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s-scheme ZnO/WO3 heterojunction photocatalyst for efficient H2O2 production

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Journal of Materials science & Technology 2022年第29期124卷 193-201页

作者： Zicong Jiang Bei Cheng Yong Zhang s.wageh Ahmed A.Al-Ghamdi Jiaguo Yu Linxi Wang state Key Laboratory of Advanced Technology for Materials synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Designing highly efficient photocatalyst for hydrogen peroxide(HO)production is an ideal strategy to avoid the shortcomings of traditional HOproduction and to realize the conversion of solar energy to chemical *** this work,a step-scheme(s-scheme)heterojunction photocatalyst composed of Zn O and WOis carefully prepared by hydrothermal and calcination method for efficient photocatalytic *** ZW30 composite photocatalysts exhibit enhanced activity with the highest HO-production rate of 6788μmol *** results show that the photocatalytic HOproduction process is dominated by a direct two-electron Oreduction *** enhanced photocatalytic HO-production activity is attributed to the formation of interfacial internal electric field(IEF)in the s-scheme heterojunction,which boosts the spatial separation of charge carriers and enables electrons with the strongest reduction power to participate in *** work provides an in-depth insight of the great advantages of s-scheme heterojunction in photocatalytic HOproduction.

关键词： Photocatalysis Hydrogen peroxide step-scheme heterojunction O2 reduction Zinc oxide

A new heterojunction in photocatalysis:s-scheme heterojunction

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Chinese Journal of Catalysis 2021年第5期42卷 667-669页

作者： s.wageh Ahmed A.Al-Ghamdi Rashida Jafer Xin Li Peng Zhang 沙特阿拉伯阿卜杜勒-阿齐兹国王大学理学院物理系沙特阿拉伯华南农业大学林学与风景园林学院农业部能源植物资源与利用重点实验室广东广州510642 郑州大学材料与工程学院低碳环保材料智能设计国际联合研究中心河南郑州450001

To harness abundant and clean solar energy along with relieving energy and environmental issues,photocatalysis holds great ***-based photocatalysts are crucial to its successful ***,the photocatalytic efficiency based on a unitary semiconductor material falls short of expectations,mainly because of the rapid recombination of photogenerated electrons and *** originates in the extremely strong Columbic force between ***,it is impossible for a single photocatalyst to achieve wide light absorption and ample redox ability concurrently.

关键词： s型异质结异质结光催化剂电荷分离机制充电转移路线 Z型光催化剂

significant capacitance enhancement induced by cyclic voltammetry in pine needle-like Ni-Co-Cu multicomponent electrode

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Journal of Materials science & Technology 2021年第19期78卷 100-109页

作者： Liqianyun Xu Liuyang Zhang Bei Cheng Jiaguo Yu Ahmed A.Al-Ghamdi s.wageh state Key Laboratory of Advanced Technology for Materials synthesis and Processing Wuhan University of TechnologyWuhan430070China school of Materials science and Engineering Zhengzhou UniversityZhengzhou.450001China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia

Poor conductivity and rate capability are the obstacles faced by nickel-cobalt composites as electrode materials for supercapacitor ***,simple electrochemical treatment conducted by cyclic voltammetry is applied and the overall performance of the active material is considerably *** discover that this treatment triggers the formation of Ni-Co-Cu ternary composite and optimizes the crystal structure of the untreated *** areal capacitance of the treated sample rockets up to 6.13 F cm^(-2)at 2 m A cm^(-2),almost 13 times higher than the untreated ***,the resistance is substantially reduced by cyclic voltammetry ***,the Coulombic efficiency and stability are concurrently *** reasons behind this treatment are mulled over and reasonable hypothesis is *** study provides a cheap and effortless way to reform the structures of as-obtained samples as well as vigorously raise the performance of current available materials.

关键词： Cyclic voltammetry Ni-Co-Cu ternary composite Ion exchange supercapacitor

s‐scheme 2D/2D Bi_(2)MoO_(6)/BiOI van der Waals heterojunction for CO_(2) photoreduction

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Chinese Journal of Catalysis 2022年第7期43卷 1657-1666页

作者： Zhongliao Wang Bei Cheng Liuyang Zhang Jiaguo Yu Youji Li s.wageh Ahmed A.Al‐Ghamdi state Key Laboratory of Advanced Technology for Materials synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina College of chemistry and chemical engineering Jishou UniversityJishou 416000HunanChina Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Reducing CO_(2) to hydrocarbon fuels by solar irradiation provides a feasible channel for mitigating excessive CO_(2) emissions and addressing resource ***,severe charge recombi‐nation and the high energy barrier for CO_(2) photoreduction on the surface of photocatalysts com‐promise the catalytic ***,a 2D/2D Bi_(2)MoO_(6)/BiOI composite was fabricated to achieve improved CO_(2) photoreduction *** transfer in the composite was facilitated by the van der Waals heterojunction with a large‐area *** function calculation demon‐strated that s‐scheme charge transfer is operative in the composite,and effective charge separation and strong redox capability were revealed by time‐resolved photoluminescence and electron para‐magnetic resonance ***,the intermediates of CO_(2) photoreduction were identi‐fied based on the in situ diffuse reflectance infrared Fourier‐transform *** functional theory calculations showed that CO_(2) hydrogenation is the rate‐determining step for yielding CH_(4) and *** Bi_(2)MoO_(6) into the composite further decreased the energy barrier for CO_(2) photoreduction on BiOI by 0.35 *** study verifies the synergistic effect of the s‐scheme heterojunction and van der Waals heterojunction in the 2D/2D composite.

关键词： 2D/2D s‐scheme heterojunction van der Waals heterojunction CO_(2)photoreduction

Cds/polymer s‐scheme H_(2)‐production photocatalyst and its in‐situ irradiated electron transfer mechanism

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Chinese Journal of Catalysis 2022年第3期43卷 586-588页

作者： s.wageh Ahmed A.Al‐Ghamdi Omar A.Al‐Hartomy Maged F.Alotaibi Linxi Wang King Abdulaziz University Saudi Arabia China University of Geosciences China

Hydrogen(H_(2))is a clean,efficient,and renewable energy with zero carbon emission,which is expected to replace the extensively used fossil *** water splitting is a promising strategy for sustainable H2 ***,the performance of single‐component photocatalysts is often confined by fast electron‐hole recombination due to strong Coulombic force,and their inability to simultaneously attain a wide absorption range and enough redox *** problems can be addressed by constructing a heterojunction between two semiconductors with different Fermi levels(EF),conduction band(CB)and valence band(VB)*** promotes light harvesting through light absorption on both semiconductors and facilitates charge separation by decoupling them on different *** are mainly three types of heterojunctions,namely the type‐II heterojunction,the Z‐scheme heterojunction,and the step‐scheme(s‐scheme)heterojunction[1–3].In a type‐II heterojunction,photogenerated electrons migrate from the higher CB to the lower one,while photogenerated holes transfer from the lower to the higher ***,this schematic is thermodynamically flawed since the charge transfer discounts the redox powers of the electrons and *** transfer is also dynamically unfavorable due to strong repulsion between the photogenerated electrons(or holes)in different *** Z‐scheme heterojunction utilizes dissolved redox ion pairs(traditional Z‐scheme)or conductive materials(all‐solid‐state Z‐scheme)as the shuttle for charge transfer and ***,the photogenerated carriers with stronger redox powers would preferentially react with the ion pairs or combine at the conductor because of stronger driving forces,leading to deducted redox powers and reduced photocatalytic activity.s‐scheme heterojunction could avoid these drawbacks and has exhibited excellent performance in organics degradation[4,5],CO_(2) reduction[6,7],hydrogen evolution[8],

关键词： s型异质结电子转移机理开尔文探针表面电势图像原位光照X射线光电子能谱

钙钛矿太阳能电池中CsPbBr3纳米晶界面修饰剂的作用机制

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物理化学学报 2022年第7期38卷 1-3页

作者： s.wageh Ahmed A.Al-Ghamdi 赵丽 Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia 湖北大学材料科学与工程学院功能材料绿色制备与应用教育部重点实验室有机化工新材料湖北省协同创新中心武汉430062

During the past decade,organic-inorganic hybrid perovskite solar cell(PsC)has attracted great attention in the photovoltaic field 1,*** the third-generation solar cell,PsC in laboratory has already achieved certified power conversion efficiency(PCE)exceeding 25%.The superb photovoltaic performance of PsC is attributed to the unique optoelectronic properties of organic-inorganic halide perovskite light absorption layer,including low exciton binding energy,high absorption coefficients,and outstanding carrier mobility 3,***,the quality of perovskite film plays a decisive role in the photovoltaic performance of *** are inevitably formed on the surface and inside of polycrystalline perovskite film during the conventional preparation ***’s widely acknowledged that defects are the recombination centers of photogenerated electrons and holes,resulting in the loss of useful photogenerated charges 5,***,decreasing the charge loss is advantageous to improving the PCE of PsC.

关键词：钙钛矿太阳能电池界面修饰 perovskite

Photocatalytic antibacterial and osteoinductivity

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Chinese Journal of Catalysis 2021年第7期42卷 1051-1053页

作者： s.wageh Ahmed A.Al-ghamdi Lijun Liu 阿卜杜勒阿齐兹国王大学理学院物理系沙特阿拉伯吉达21589 武汉纺织大学化学与化工学院中国湖北武汉430200

Implants of titanium(Ti)and its alloys have been widely used for decades in bone tissue *** implantation is unavoidably accompanied by bacterial infection,which requires extensive surgical intervention and antibiotic *** infections increase the risk of implant failure and bone loss and can result in limb amputation in severe *** antibiotic treatment also induces irreversible drug resistance in humans[1,2].studies designed to optimize Ti containing implants have focused on surface modification or improvements of topological *** implants can induce stem cell differentiation and bone regeneration[3].However,designing implants that resist colonization by bacteria has not been explored extensively.

关键词：石墨炔活性氧物种抗菌性诱导骨组织生长生物相容性

核壳Au@Nis1+x助催化剂实现高效TiO_(2)光催化制氢

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物理化学学报 2022年第7期38卷 4-6页

作者： s.wageh Ahmed A.Al-Ghamdi 徐全龙 Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia 温州大学化学与材料工程学院浙江省碳材料技术研究重点实验室浙江温州325027

The convertion of solar energy into hydrogen energy with high energy density by photocatalysis is a green and eco-friendly avenue to solve the energy crisis and environmental pollution issues 1,***,most photocatalysts usually suffer from the rapid quenching of photogenerated carriers and depressed interfacial H_(2)-generation dynamics 3,*** overcome the above shortcomings,cocatalysts are widely employed to promote the separation of photocarriers and to create active sites for surface catalytic reactions *** a superb cocatalyst,its active sites usually play a key role in the overall performance of photocatalytic H_(2) evolution because the active sites can not only provide a large number of adsorption centers to enrich H+,but also present an outstanding catalytic efficiency to convert H+into H_(2) by reducing its reaction overpotential ***,the active-site number and efficiency of cocatalysts should be maximized as much as possible to greatly boost the cocatalytic H2-evolution activity by photocatalysis.

关键词： convert overcome shortcomings

Preparation of epoxy resin/rare earth doped aluminate nanocomposite toward photoluminescent and superhydrophobic transparent woods

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Journal of Rare Earths 2023年第3期41卷 397-405,I0003页

作者： Mehrez E.El-Naggar sami Ullah s.wageh M.A.Abu-saied Tawfik A.Khattab Dalal Alhashmialameer Manal Abou Taleb E.A.Matter Institute of Textile Research and Technology National Research CenterDokkiCairo16221Egypt Research Center for Advanced Materials science(RCAMs) King Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia K.A.CARE Energy Research and Innovation Center King Abdulaziz UniversityJeddah21589Saudi Arabia Polymeric Materials Research Department Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTACITY)New Borg El-Arab CityAlexandria21934Saudi Arabia Department of Chemistry College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Chemistry College of Science and HumanitiesPrince Sattam Bin Abdulaziz UniversityAl-kharj11942Saudi Arabia Department of Polymer Chemistry National Center for Radiation Research and Technology(NCRRT)Egyptian Atomic Energy AuthorityNasr CityP.O.Box 7551Cairo11762Egypt Department of Chemistry Faculty of ScienceDamanhour University22111 DamanhourEgypt

A translucent wooden substrate with long-lasting phosphorescence,high photostability and durability,tough surface,ultraviolet protection,high optical transmittance,and superhydrophobicity was *** long-lasting phosphorescent wooden substrate is able to continue emitting light for extended time ***-modified wood(LMW)was immobilized with a solution of epoxy resin(ER)and rare-earth doped aluminate(REDA)phosphor nanoparticles(NPs).For an improved dispersion of pigment,REDA was synthesized in a nanoscale particle size,and characterized by transmission electron microscopy(TEM)to indicate a particle size of 8-14 *** crystal structure of REDA nanoparticles was also proved by X-ray diffraction(XRD).For an improved production of long-persistent phosphorescent colo rless woods,REDA must be well-dispersed in MAA without *** and emissio n,as well as decay and lifetime spectra were *** morphologies of the wooden substrates with different ratios of REDA were investigated by scanning electron microscopy(sEM),X-ray fluorescence(XRF)analysis,Fourier transform infrared spectra(FT-IR),elemental mapping,and energy-dispersion Xray(EDXA).The phosphorescent woods show changes in color from colorless to green under ultraviolet(UV)irradiation,and to yellowish-green in the dark,as proved by the colorimetric parameters of the CIE Lab *** afterglow wood samples display an absorbance band at 365 nm and two phosphorescent bands at 431 and 520 *** UV shielding,photostability,and hydrophobicity were *** increasing REDA ratio,both static contact and slide angles are found to improve in the ranges of147.6°-163.6°and 9°-14°,*** long-lasting photoluminescence is optimized at a REDA ratio of 8%.The present strategy shows a large-scale production approach of multiple functional woods for many potential applications,such as smart glow in the dark windows and safety signs.

关键词： Translucent wood Rare-earth doped aluminate superhydrophobic Long-lasting light emission Ultraviolet protection