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Activation of peroxymonosulfate by bicarbonate and acceleration of the reaction by freezing.

Sci Total Environ 2021 Apr 27;785:147369. Epub 2021 Apr 27.

Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea; Department of Polar Science, University of Science of Technology (UST), Incheon 21990, Republic of Korea. Electronic address:

This study demonstrates the positive effects of dissolved bicarbonate and carbonate anions on peroxymonosulfate (PMS) induced oxidation and the remarkable acceleration of the reaction by freezing. More than 90% of the initial 4-chlorophenol (4-CP) decomposed in the frozen case, whereas only less than 20% of the 4-CP was removed in the aqueous case in the same time period. This accelerated reaction is attributed to the freeze-concentration of the dissolved substrates (i. Read More

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The Spectral Irradiance, Growth, Photosynthetic Characteristics, Antioxidant System, and Nutritional Status of Green Onion ( L.) Grown Under Different Photo-Selective Nets.

Front Plant Sci 2021 25;12:650471. Epub 2021 Mar 25.

College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.

The active regulation of the plant growth environment is a common method for optimizing plant yield and quality. In horticulture today, light quality control is carried out using photo-selective nets or membranes to improve the yield and quality of cultivated plants. In the present study, with natural light as the control (CK), we tested different photo-selective nets (white, WN; blue, BN; green, GN; yellow, YN; and red, RN) with 30% shade for characteristics of growth, development, quality, yield, photosynthesis, and chlorophyll fluorescence, considering the antioxidant system, as well as the influence of element absorption and transformation of green onion ( L. Read More

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Photo-CIDNP in Solid State.

Appl Magn Reson 2021 Apr 6:1-17. Epub 2021 Apr 6.

Institut für Medizinische Physik und Biophysik, Universität Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany.

Photo-CIDNP (photo-chemically induced dynamic nuclear polarization) refers to nuclear polarization created by the spin-chemical evolution of spin-correlated radical pairs (SCRPs). This phenomenon occurs in gases, liquids and solids. Based on the solid-state photo-CIDNP effect observed under magic-angle spinning (MAS), photo-CIDNP MAS NMR has been developed as analytical method. Read More

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Drivers and consequences of child marriage in a context of protracted displacement: a qualitative study among Syrian refugees in Egypt.

BMC Public Health 2021 Apr 7;21(1):674. Epub 2021 Apr 7.

Johns Hopkins Bloomberg School of Public Health, Baltimore, USA.

Background: Child marriage is a human rights violation disproportionately impacting girls in low- and middle-income countries. In the Middle East region, conflict and displacement have prompted concerns that families are increasingly resorting to child marriage to cope with economic insecurity and fears from sexual violence. This study set out to examine child marriage among Syrian refugees residing in Egypt with the aim of understanding drivers of child marriage in this context of displacement as well as how child marriage affects refugee girls' wellbeing. Read More

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Photomorphogenesis in the Picocyanobacterium Includes Increased Phycobilisome Abundance Under Blue Light, Phycobilisome Decoupling Under Near Far-Red Light, and Wavelength-Specific Photoprotective Strategies.

Front Plant Sci 2021 18;12:612302. Epub 2021 Mar 18.

Balaton Limnological Institute, Centre for Ecological Research, Tihany, Hungary.

Photomorphogenesis is a process by which photosynthetic organisms perceive external light parameters, including light quality (color), and adjust cellular metabolism, growth rates and other parameters, in order to survive in a changing light environment. In this study we comprehensively explored the light color acclimation of , a common cyanobacterium in turbid freshwater shallow lakes, using nine different monochromatic growth lights covering the whole visible spectrum from 435 to 687 nm. According to incident light wavelength, cells performed great plasticity in terms of pigment composition, antenna size, and photosystem stoichiometry, to optimize their photosynthetic performance and to redox poise their intersystem electron transport chain. Read More

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Amplify antimicrobial photo dynamic therapy efficacy with poly-beta-amino esters (PBAEs).

Sci Rep 2021 Mar 31;11(1):7275. Epub 2021 Mar 31.

Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, UK.

Light-activated antimicrobial agents (photosensitisers) are promising alternatives to antibiotics for the treatment of skin infections and wounds through antimicrobial photo dynamic therapy (aPDT); utilisation of this technique is still restricted by general low efficacy requiring long exposure time (in the order of tens of minutes) that make the treatment very resource intensive. We report for the first time the possibility of harvesting the cell penetrating properties of poly-beta-amino esters (PBAEs) in combination with toluidine blue O (TBO) to shorten aPDT exposure time. Candidates capable of inactivation rates 30 times quicker than pure TBO were discovered and further improvements through PBAE backbone optimisation could be foreseen. Read More

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Lighting up forensic science by aggregation-induced emission: A review.

Anal Chim Acta 2021 Apr 2;1155:238119. Epub 2020 Dec 2.

Department of Forensic Medicine, Tongji Medical School, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan, 430030, China. Electronic address:

Forensic science requires a fast, sensitive, and anti-interfering imaging tool for on-site investigation and bio-analysis. The aggregation-induced emission (AIE) phenomenon exhibits remarkable luminescence properties (large Stokes shift, diverse molecular structures, and high photo-stability), which can provide a viable solution for on-site analysis, while at the same time overcoming the problem of aggregation-caused quenching (ACQ). Based on the outstanding performance in chemical analysis and bio-sensing, AIE materials have great prospects in the field of forensic science. Read More

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[Cu (PPh ) (PET) ] : a Copper Nanocluster with Crystallization Enhanced Photoluminescence.

Small 2021 Mar 19:e2006839. Epub 2021 Mar 19.

KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.

Due to their atomically precise structure, photoluminescent copper nanoclusters (Cu NCs) have emerged as promising materials in both fundamental studies and technological applications, such as bio-imaging, cell labeling, phototherapy, and photo-activated catalysis. In this work, a facile strategy is reported for the synthesis of a novel Cu NCs coprotected by thiolate and phosphine ligands, formulated as [Cu (PPh ) (PET) ] , which exhibits bright emission in the near-infrared (NIR) region (≈720 nm) and crystallization-induced emission enhancement (CIEE) phenomenon. Single crystal X-ray crystallography shows that the NC possesses an extraordinary distorted trigonal antiprismatic Cu core and a, unique among metal clusters, "tri-blade fan"-like structure. Read More

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Applications of bioluminescence in biotechnology and beyond.

Chem Soc Rev 2021 May 18;50(9):5668-5705. Epub 2021 Mar 18.

Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.

Bioluminescence is the fascinating natural phenomenon by which living creatures produce light. Bioluminescence occurs when the oxidation of a small-molecule luciferin is catalysed by an enzyme luciferase to form an excited-state species that emits light. There are over 30 known bioluminescent systems but the luciferin-luciferase pairs of only 11 systems have been characterised to-date, whilst other novel systems are currently under investigation. Read More

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Robust and practical measurement of volume transport parameters in solid photo-polymer materials for 3D printing.

Opt Express 2021 Mar;29(5):7568-7588

Volumetric light transport is a pervasive physical phenomenon, and therefore its accurate simulation is important for a broad array of disciplines. While suitable mathematical models for computing the transport are now available, obtaining the necessary material parameters needed to drive such simulations is a challenging task: direct measurements of these parameters from material samples are seldom possible. Building on the inverse scattering paradigm, we present a novel measurement approach which indirectly infers the transport parameters from extrinsic observations of multiple-scattered radiance. Read More

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Light driven diffusioosmotic repulsion and attraction of colloidal particles.

J Chem Phys 2020 May;152(19):194703

Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany.

In this paper, we introduce the phenomenon of light driven diffusioosmotic long-range attraction and repulsion of porous particles under irradiation with UV light. The change in the inter-particle interaction potential is governed by flow patterns generated around single colloids and results in reversible aggregation or separation of the mesoporous silica particles that are trapped at a solid surface. The range of the interaction potential extends to several times the diameter of the particle and can be adjusted by varying the light intensity. Read More

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Ultrasound for diagnosis of birth weight discordance in twin pregnancies.

Cochrane Database Syst Rev 2021 03 9;3:CD012553. Epub 2021 Mar 9.

Section of Neonatology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA.

Background: There is a need to standardize monitoring in obstetric research of twin pregnancies. Identification of birth weight discordance (BWD), defined as a difference in the birth weights of twins, is a well-documented phenomenon in twin pregnancies. Ultrasound for the diagnosis of BWD informs complex decision making including whether to intervene medically (via laser photo coagulation) or deliver the twins to avoid fetal morbidities or even death. Read More

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Remediation of emerging environmental pollutants: A review based on advances in the uses of eco-friendly biofabricated nanomaterials.

Chemosphere 2021 Jul 15;275:129975. Epub 2021 Feb 15.

Laboratory of Plant Healthcare and Diagnostics, PG Department of Biotechnology and Microbiology, Karnataka University, Dharwad, 580 003, Karnataka, India. Electronic address:

The increased environmental pollutants due to anthropogenic activities are posing an adverse effects and threat on various biotic forms on the planet. Heavy metals and certain organic pollutants by their toxic persistence in the environment are regarded as significant pollutants worldwide. In recent years, pollutants exist in various forms in the environment are difficult to eliminate by traditional technologies due to various drawbacks. Read More

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An insight into the dual fluorescence of 3,6-dihydroxybenzene-1,2,4,5-tetracarboxylic acid tetraethyl ester - An experimental and theoretical study.

Spectrochim Acta A Mol Biomol Spectrosc 2021 May 22;252:119496. Epub 2021 Jan 22.

Department of Chemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram 695581, Kerala, India. Electronic address:

The Excited State Intramolecular Proton Transfer (ESIPT) phenomenon involving photo-induced keto-enol tautomerization is known to cause significant variations in the excited state structures and photophysical properties of certain molecules. Here, the dual emission exhibited by 3,6-dihydroxybenzene-1,2,4,5-tetracarboxylic acid tetraethyl ester has been studied both experimentally and theoretically and it is concluded that the second emission is due to ESIPT in polar protic solvents, while it is due to dianion formation in solvents like DMSO and DMF. Read More

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Degradation of Antibiotics in Wastewater: New Advances in Cavitational Treatments.

Molecules 2021 Jan 25;26(3). Epub 2021 Jan 25.

Dipartimento di Scienza e Tecnologia del Farmaco, University of Turin, Via P. Giuria 9, 10125 Turin, Italy.

Over the past few decades, antibiotics have been considered emerging pollutants due to their persistence in aquatic ecosystems. Even at low concentrations, these pollutants contribute to the phenomenon of antibiotic resistance, while their degradation is still a longstanding challenge for wastewater treatment. In the present literature survey, we review the recent advances in synergistic techniques for antibiotic degradation in wastewater that combine either ultrasound (US) or hydrodynamic cavitation (HC) and oxidative, photo-catalytic, and enzymatic strategies. Read More

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January 2021

Ag-nanoparticles-loaded BaCaTiZrO for multicatalytic dye degradation.

Nanotechnology 2021 Jan 19;32(14):145716. Epub 2021 Jan 19.

BaCaTiZrO (BCZTO) ferroelectric ceramic loaded with Ag nanoparticles (NPs) was explored for its photo/piezocatalytic performance. The presence of Ag loading on BCZTO ceramic was confirmed using electron microscopes. X-ray photoelectron spectroscopy revealed the metallic chemical state of Ag NPs loaded on the surface of BCZTO ceramic. Read More

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January 2021

One-pot synthesis of novel water-dispersible fluorescent silicon nanoparticles for selective CrO sensing.

Anal Methods 2021 01;13(3):390-398

School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, PR China.

Chromium (Cr(vi)), a highly toxic metal-oxyanion which is carcinogenic and mutagenic to humans, is a severe environmental pollutant. Developing simple methods for sensitive and selective detection of Cr(vi) is of great significance. In this work, fluorescent silicon nanoparticles (SiNPs) with good water solubility were facilely synthesized via a one-step hydrothermal method by using (3-aminopropyl)triethoxysilane (APTES) as the silicon source and natural antioxidant quercetin as the reducing agent. Read More

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January 2021

Photo-responsive functional gold nanocapsules for inactivation of community-acquired, highly virulent, multidrug-resistant MRSA.

J Mater Chem B 2021 01;9(3):846-856

Department of Biomedical Engineering, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, wybrzeże Stanisława Wyspiańskiego 27, Wrocław 50-370, Poland.

The indiscriminate and sporadic use of antibiotics has contributed to the emergence of drug resistance phenomenon in bacteria including but not limited to Staphylococcus aureus. These drug-resistant bacteria have been threatening safety in hospitals and adversely affecting human health. Here we report a strategy to design photo-stimulated theranostic nanoprobes against methicillin-resistant Staphylococcus aureus (MRSA) "superbug" USA300. Read More

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January 2021

Ag nanoparticles loadedBa0.85Ca0.15Ti0.9Zr0.1O3for multicatalytic dye degradation.

Nanotechnology 2020 Dec 22. Epub 2020 Dec 22.

School of Engineering, Indian Institute of Technology - Bombay, Mandi 175001, Mandi, INDIA.

Ba0.85Ca0.15Ti0. Read More

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December 2020

Surgical Outcomes of Unilateral Marcus Gunn Jaw Winking Ptosis Correction: A Novel Whitnall's Ligament Approach.

Korean J Ophthalmol 2021 02 11;35(1):18-25. Epub 2020 Dec 11.

Department of Orbit & Oculoplasty and Reconstructive Surgery, Regional Institute of Ophthalmology, Medical College and Hospital, Calcutta, India.

Purpose: To evaluate the surgical, functional, and cosmetic outcome in moderate to severe ptosis with Marcus Gunn jaw winking phenomenon and recurrence of disease after ptosis correction. This procedure has been emphasized on a child.

Methods: This was a prospective, non-comparative, interventional study conducted over 4 years on 30 people. Read More

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February 2021

New insights on the enhanced non-hydroxyl radical contribution under copper promoted TiO/GO for the photodegradation of tetracycline hydrochloride.

J Environ Sci (China) 2021 Feb 24;100:99-109. Epub 2020 Jul 24.

State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China.

TiO/graphene oxide (GO) as photocatalyst in the photo-degradation of multitudinous pollutants has been extensively studied. But its low photocatalytic efficiency is attributed to the high band gap energy which lead to low light utilization. Cu-TiO/GO was synthesized via the impregnation methods to enhance the catalytic performance. Read More

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February 2021

A systematic protocol of microplastics analysis from their identification to quantification in water environment: A comprehensive review.

J Hazard Mater 2021 02 19;403:124049. Epub 2020 Sep 19.

Department of Environmental Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, South Korea. Electronic address:

With microplastics (MPs) being detected in aquatic environments, numerous studies revealed that they caused severe environmental issues, including damage to ecosystems and human health. MPs transport persistent organic pollutants by adsorbing them, and in nanoplastics this phenomenon is exacerbated by increased surface area. Despite their environmental risk, systematic protocol for qualitative and quantitative analysis are yet to be established in environmental analytical chemistry. Read More

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February 2021

Photocatalytic and biocidal activities of ZnTiO oxynitride heterojunction with MOF-5 and g-CN: A case study for textile wastewater treatment under direct sunlight.

J Hazard Mater 2021 May 18;410:124562. Epub 2020 Nov 18.

Petroelum Biotechnology Lab., Department of Process Design and Development, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt; Center of Excellence, October University for Modern Sciences and Arts (MSA), 6th of October City, Giza, PO 12566, Egypt; Nanobiotechnology Program, Faculty of Nanotechnology for Postgraduate Studies, Cairo University, Sheikh Zayed Branch Campus, Sheikh Zayed City, Giza, PO 12588, Egypt.

The work aimed to synthesize three heterojunction photocatalysts (E = 2.65-2.78 eV) via in-situ encapsulation of 5% zinc doped titanium oxynitride (ZnTiON) catalyst into MOF-5 and bulk (BCN)/sulfur-doped (SCN) g-CN supports using a microwave method. Read More

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Luminescence imaging of leaf damage induced by lipid peroxidation products and its modulation by β-cyclocitral.

Physiol Plant 2021 Feb 1;171(2):246-259. Epub 2020 Dec 1.

Institute of Biosciences and Biotechnologies, CEA/Cadarache, Aix Marseille University, CEA, CNRS, BIAM, UMR7265, Saint-Paul-lez-Durance, France.

Lipid peroxidation is a primary event associated with oxidative stress in plants. This phenomenon secondarily generates bioactive and/or toxic compounds such as reactive carbonyl species (RCS), phytoprostanes, and phytofurans, as confirmed here in Arabidopsis plants exposed to photo-oxidative stress conditions. We analyzed the effects of exogenous applications of secondary lipid oxidation products on Arabidopsis plants by luminescence techniques. Read More

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February 2021

Thiol-Norbornene gelatin hydrogels: influence of thiolated crosslinker on network properties and high definition 3D printing.

Biofabrication 2020 Nov 11. Epub 2020 Nov 11.

Polymer Chemistry and Biomaterials Research Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Gent, BELGIUM.

Photocrosslinkable gelatin hydrogels are excellent bioinks or biomaterial ink components to serve biofabrication applications. Especially the widely investigated gelatin-methacroyl hydrogels hold an impressive track record. However, over the past decade, increasing attention is being paid to thiol-ene photo-click chemistry to obtain hydrogel networks benefitting from a faster reactivity (i. Read More

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November 2020

A new photochromic Gd-MOF with photoswitchable bluish-white to greenish-yellow emission based on electron transfer.

Chem Commun (Camb) 2020 Nov;56(93):14689-14692

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.

Utilization of photochromism in photo-switchable white-light emitters (WLEs) is a challenging task. In an effort to achieve this, we have recently developed a new Gd-MOF using a photoactive pyridinium-based inner salt. The compound shows interesting photoswitchable bluish white light to greenish yellow light emission as a result of electron transfer, a phenomenon that has not been observed previously in photochromic crystal compounds. Read More

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November 2020

Bio-Inspired Toughening of Composites in 3D-Printing.

Materials (Basel) 2020 Oct 22;13(21). Epub 2020 Oct 22.

TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.

Natural materials achieve exceptional mechanical properties by relying on hierarchically structuring their internal architecture. In several marine species, layers of stiff and hard inorganic material are separated by thin compliant organic layers, giving their skeleton both stiffness and toughness. This phenomenon is fundamentally based on the periodical variation of Young's modulus within the structure. Read More

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October 2020

Radiation Dose-Enhancement Is a Potent Radiotherapeutic Effect of Rare-Earth Composite Nanoscintillators in Preclinical Models of Glioblastoma.

Adv Sci (Weinh) 2020 Oct 7;7(20):2001675. Epub 2020 Sep 7.

Synchrotron Radiation for Biomedical Research (STROBE) UA7 INSERM Université Grenoble Alpes Medical Beamline at the European Synchrotron Radiation Facility 71 Avenue des Martyrs Grenoble Cedex 9 38043 France.

To improve the prognosis of glioblastoma, innovative radiotherapy regimens are required to augment the effect of tolerable radiation doses while sparing surrounding tissues. In this context, nanoscintillators are emerging radiotherapeutics that down-convert X-rays into photons with energies ranging from UV to near-infrared. During radiotherapy, these scintillating properties amplify radiation-induced damage by UV-C emission or photodynamic effects. Read More

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October 2020

Adsorption-photocatalysis synergistic removal of contaminants under antibiotic and Cr(VI) coexistence environment using non-metal g-CN based nanomaterial obtained by supramolecular self-assembly method.

J Hazard Mater 2021 02 5;404(Pt A):124171. Epub 2020 Oct 5.

School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China.

Due to the rapid development of modern industry, the coexistence of antibiotics and inorganic heavy metals pollutants in wastewater has become a universal phenomenon. Therefore, developing efficient and eco-friendly photocatalyst for mixed pollutants degradation is significant. In this work, a well-designed phosphorus and sulfur co-doped g-CN with feeble N vacancies catalyst (P/S-g-CN) was fabricated by supramolecular self-assembly method, and was applied to remove berberine hydrochloride (BH) and Cr(VI) simultaneously with the synergy of adsorption-photocatalysis. Read More

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February 2021

UV-irradiation assisted functionalization and binding of Pd nanoparticles in polycarbonate membranes for hydrogen separation.

Environ Sci Pollut Res Int 2020 Oct 9. Epub 2020 Oct 9.

Department of Physics, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India.

For hydrogen-based energy systems development, purified hydrogen (H) is a basic requirement and it can be achieved by using the H-selective membranes. For having H-selective membranes, it is a decent approach to embed the H-sensitive materials in the polymeric membranes. Palladium (Pd) is one of the widely used materials for hydrogen-selective membranes due to its strong affinity towards H absorption. Read More

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October 2020