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Recent advances in kaolinite-based material for photocatalysts

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Chinese Chemical Letters 2021年第9期32卷 2617-2628页

作者： Zhou Cao qizhao wang Hongfei Cheng School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang’an UniversityXi’an 710054China Department of Materials Science and Engineering Northwestern UniversityEvanstonIL60208United States

The composite catalytic materials based on the mineral kaolinite are considered to be a potential approach for solving global energy scarcity and environmental pollution,which have excellent catalytic performance,low cost and excellent chemical ***,pure kaolinite does not have visible light absorption ability and cannot be used as a potential photocatalytic ***,the unique physical and chemical properties of kaolinite can be acted as a good semiconductor ***,this paper firstly presents the mineralogical characteristics of ***,kaolinite-based photocatalysts(such as TiO_(2)/kaolinite,g-C_(3)N_(4)/kaolinite,g-C_(3)N_(4)/TiO_(2)/kaolinite,Zn O)are discussed in detail from the formation of heterostructures,synthesis-modification methods,photocatalytic mechanisms,and electron transfer ***,the specific role of kaolinite in photocatalytic materials is summarized and *** addition,the photocatalytic applications of kaolinite-based photocatalysts in the fields of water decomposition,pollutant degradation,bacterial disinfection are ***,the modification of kaolinite is hard,the manufacture of a large number of kaolinite-based photocatalysts is difficult,the cost of doping noble metals is expensive,and the utilization rate of visible light is low,which limits its application in industrial ***,this paper presents some perspectives on the future development of kaolinite-based photocatalysts.

关键词： Kaolinite Titanium dioxide Graphite carbonitride Photocatalyst Heterojunction

Enhanced performance of NiF_(2)/BiVO_(4)photoanode for photoelectrochemical water splitting

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Frontiers in Energy 2021年第3期15卷 760-771页

作者： Ziwei ZHAO Kaiyi CHEN Jingwei HUANG Lei wang Houde SHE qizhao wang College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of EducationChang’an UniversityXi’an 710054China

The serious surface charge recombination and fatigued photogenerated carriers transfer of the BiVO_(4)photoanode restrict its photoelectrochemical(PEC)water splitting *** this work,nickel fluoride(NiF_(2))is applied to revamp pure BiVO_(4)photoanode by using a facile electrodeposition *** a result,the asprepared NiF_(2)/BiVO_(4)photoanode increases the dramatic photocurrent density by approximately 180%compared with the pristine BiVO_(4)***,the correlative photon-to-current conversion efficiency,the charge injection,and the separation efficiency,as well as the hydrogen generation of the composite photoanode have been memorably enhanced due to the synergy of NiF_(2)and BiVO_(4).This study may furnish a dependable guidance in fabricating the fluoride-based compound/semiconductor composite photoanode system.

关键词： BiVO_(4) NiF_(2) heterojunction photoelectrochemical water splitting

In-situ incorporation of Copper （Ⅱ） porphyrin functionalized zirconium MOF and TiO2 for efficient photocatalytic CO2 reduction

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Science Bulletin 2019年第13期64卷 926-933页

作者： Lei wang Pengxia Jin Shuhua Duan Houde She Jingwei Huang qizhao wang College of Chemistry and Chemical Engineering Key Laboratory of Eco-Environment-Related Polymer MaterialsMinistry of EducationNorthwest Normal UniversityLanzhou 730070China School of Environmental Science and Engineering Chang'an UniversityXi'an 710064China

As one of the highly effective methods to prepare catalysts for photocatalytic reduction of CO2 into valueadded chemicals,using metalloporphyrin as light-harvesting mixed ligand to modify metal-organic framework(MOF)is very valuable since it can greatly improve the prophyrin dispersibility and consequently inhibit its potential ***,we employed a one-pot synthetic strategy to chemically immobilize Cu(II)tetra(4-carboxylphenyl)porphyrin(CuTCPP)into UiO-66 MOF structure through coordination ***,in-situ growth of TiO2 nanoparticles onto the MOF is actualized with the generation of CuTCPP c UiO-66/TiO2(CTU/TiO2)*** Xe lamp irradiation(λ>300 nm),the catalytic result presents that an optimal value of 31.32 μmol g^-1 h^-1 CO evolution amount,about 7 times higher than that of pure TiO2 was obtained through the *** is supposed owning to a consistent augment of light absorption derived from chemically implanted porphyrin derivative,which is simultaneously functioning with an efficacious separation of photo-induced carries given by the newly engendered composites between MOF and TiO2,an effective catalytic activity and approving recyclability of CTU/TiO2 can be achieved in the photocatalytic reduction of CO2 into CO.

关键词： Cu (Ⅱ) tetra (4-carboxylphenyl) porphyrin (CuTCPP) Metal-organic frameworks Photocatalytic CO2 reduction TiO2

Facile fabrication of CdIn_(2)S_(4)/TiO_(2)heterojunction for enhanced solar light efficient CO_(2)reduction

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 101-112页

作者： Xiaoyu Ma Longlong wang Houde She Yu Zhou Lei wang Jingwei Huang qizhao wang College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China School of Environment Science and Engineering Chang’an UniversityXi’an 710064China

Photocatalytic CO_(2)reduction is a promising solution to simultaneously provide renewable chemical fuels and address the greenhouse ***,designing practical photocatalysts with advanced architectures remains ***,we report the preparation of a novel CdIn_(2)S_(4)/TiO_(2)binary heterojunction via an in situ solvothermal approach,which exhibits superior photocatalytic activity for sunlight-driven CO_(2)*** CdIn_(2)S_(4)/TiO_(2)composites exhibit significantly enhanced photocatalytic performance for CO_(2)reduction compared to unmodified TiO_(2).Among them,the 3%CdIn_(2)S_(4)/TiO_(2)composite has optimal CO and CH_(4) evolution rates of 18.32 and 1.03μmol·g^(–1)·h^(–1),*** yield of CO is 4.7 times higher than that of pristine TiO_(2).This improved photocatalytic activity of the CdIn_(2)S_(4)/TiO_(2)heterostructure can be attributed to its large surface area,extended light absorption range and high separation efficiency of photogenerated electron-hole pairs,which are supported by the results of photoluminescence spectroscopy and the photoelectrochemical ***,the photocatalytic mechanism based on the binary CdIn_(2)S_(4)/TiO_(2)heterojunction is proposed and separation process of photogenerated electron-hole pairs is *** brief,we aim to provide insights into the application of TiO_(2)in energy conversion processes through the construction of heterogeneous junctions.

关键词： TiiO_(2) CdIn_(2)S_(4) heterojunction photocatalytic CiO_(2)reduction

Recent advances in bismuth vanadate-based photocatalysts for photoelectrochemical water splitting

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Chinese Chemical Letters 2021年第6期32卷 1869-1878页

作者： Lina wang Xiaoqiang Shi Yuefa Jia Hongfei Cheng Lei wang qizhao wang School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang'an UniversityXi'an 710054China College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China

Photoelectrochemical(PEC)technology is considered to be a promising approach for solar-driven hydrogen production with zero *** vanadate(BiVO_(4))is a kind of photocatalytic material with strong photoactivity in the visible light region and appropriate band gap for PEC water ***,the solar-to-hydrogen efficiency(STH)of BiVO_(4)is far away from the 10%target needed for practical application due to its poor charge separation ***,this review attempts to summarize the strategies for improving the photocurrent density and especially hydrogen production of BiVO_(4)materials through PEC techniques in the last three years,such as doping nonmetal and metal elements,depositing noble metals,constructing heterojunctions,coupling with carbon and metalorganic framework(MOF)materials to further enhance the PEC performance of BiVO_(4)*** review aims to serve as a general guideline to fabricate highly efficient BiVO_(4)-based materials for PEC water splitting.

关键词： Bismuth vanadate(BiVO_(4)) Photoelectrochemical Water splitting Hydrogen production Heterojunctions

In situ conversion builds MIL-101@NiFe-LDH heterojunction structures to enhance the oxygen evolution reaction

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Chinese Chemical Letters 2022年第8期33卷 3787-3791页

作者： Jingwei Huang Kai Li Lei wang Houde She qizhao wang College of Chemistry and Chemical Engineering Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional MaterialsNorthwest Normal UniversityLanzhou 730070China School of Environmental Science and Engineering Chang'an UniversityXi'an 710054China Tianjin Key Laboratory of Building Green Functional Materials Tianjin Chengjian UniversityTianjin 300384China

The construction of rich phase interfaces to increase active reaction area in hybrid materials is an excellent strategy to improve electrochemical *** this guideline,MIL-101@OX-metal organic framework(MOF)is constructed by the"MOF on MOF"method,then converts to MIL-101@NiFe-layered double hydroxides(LDH)by in situ transformation in alkaline ***-101@NiFe-LDH shows excellent electrochemical water oxidation *** needs only an overpotential of 215 m V to drive10 m A/cm^(2)of oxygen evolution reaction(OER),which is less than that of NiFe-LDH,*** addition,MIL-101@NiFe-LDH has the smallest Tafel slope(55.1 mV/dec)compared with Ni Fe-LDH(61.1 m V/dec),MIL-101(150.8 m V/dec).The excellent water oxidation activity is due to the high phase interfaces derived from high specific surface area of *** work offers an alternative method for making MOF/LDH heterostructures with an optimized phase interfaces and provides new insights for OER.

关键词： Mil-101@NiFe-LDH OER Electrocatalysis Alkalize

Boosting the photoelectrochemical water oxidation performance of bismuth vanadate by ZnCo_(2)O_(4) nanoparticles

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Chinese Chemical Letters 2022年第4期33卷 2060-2064页

作者： Jingwei Huang Yani wang Kaiyi Chen Tingting Liu qizhao wang School of Environment Science and Engineering Chang’an UniversityXi’an 710064China College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China Tianjin Key Laboratory of Building Green Functional Materials Tianjin Chengjian UniversityTianjin 300384China

Due to the involvement of four-electron transfer process at photoanode,water oxidation is the ratelimiting step in water splitting *** settle this dilemma,ZnCo_(2)O_(4)nanoparticles are combined with BiVO_(4)to form a p-n ZnCo_(2)O_(4)/BiVO;heterojunction photoanode,which is proved by an input voltage-output current *** built-in electric field formed within the heterojunction structure promotes the effective separation of electrons and ***_(2)O_(4)is also an effective water oxidation cocatalyst,since it could cause the holes entering the electrode/electrolyte interface rapidly for the subsequent water oxidation *** photocurrent density of ZnCo_(2)O_(4)/BiVO_(4)composite photoanode reaches 3.0 mA/cm^(2) at 1.23 V *** in 0.5 mol/L sodium sulfate under AM 1.5 G simulated sunlight,about 2.1 times greater than that of BiVO_(4)(1.4 mA/cm^(2)).These results suggest the potential of ZnCo_(2)O_(4)nanoparticles for improving photoelectrochemical water splitting anode materials.

关键词： Photoelectrochemical water oxidation BiVO_(4) ZnCo_(2)O_(4) p-n junction

Construction of ternary CuO/CuFe_(2)O_(4)/g-C_(3)N_(4)composite and its enhanced photocatalytic degradation of tetracycline hydrochloride with persulfate under simulated sunlight

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Journal of Environmental Sciences 2022年第2期34卷 59-70页

作者： Lei wang Xiaolei Ma Guofang Huang Rui Lian Jingwei Huang Houde She qizhao wang Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China School of Environmental Science and Engineering Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang'an UniversityXi'an 710054China

In this study,a graphitic carbon nitride(g-C_(3)N_(4))based ternary catalyst Cu O/Cu Fe_(2)O_(4)/gC_(3)N_(4)(CCCN)is successfully prepared thorough calcination *** confirming the structure and composition of CCCN,the as-synthesized composites are utilized to activate persulfate(PS)for the degradation of organic *** using tetracycline hydrochloride(TC)as pollutant surrogate,the effects of initial p H,PS and catalyst concentration on the degradation rate are systematically *** the optimized reaction condition,CCCN/PS is able to give 99%degradation extent and 74%chemical oxygen demand removal in assistance of simulated solar light,both of which are apparently greater than that of either Cu O/Cu Fe_(2)O_(4)and pristine g-C_(3)N_(4).The great improvement in degradation can be assignable to the effective separation of photoinduced carriers thanks to the integration between Cu O/Cu Fe_(2)O_(4)and g-C_(3)N_(4),as well as the increased reaction sites given by the g-C_(3)N_(4)***,the scavenging trials imply that the major oxidative matters involved in the decomposition are hydroxyl radicals(·OH),superoxide radicals(·O_(2)^(-))and photo-induced holes(h^(+)).

关键词： Copper ferrite Graphitic carbon nitride Heterojunction photocatalyst Peroxydisulfate Tetracycline hydrochloride

Boosting charge separation of BiVO_(4)photoanode modified with 2D metal-organic frameworks nanosheets for high-performance photoelectrochemical water splitting

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Chinese Chemical Letters 2023年第6期34卷 287-292页

作者： Lina wang Zejun Liu Jinming Zhang Yuefa Jia Jingwei Huang Qiong Mei qizhao wang School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang’an UniversityXi’an 710054China College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China School of Land Engineering Chang’an UniversityXi’an 710054China

Water splitting by photoelectrochemical(PEC)processes to convert solar energy into hydrogen energy using semiconductors is regarded as one of the most ideal methods to solve the current energy crisis and has attracted widespread ***,Co-based metal-organic framework(Co(bpdc)(H_(2)O)_(4)(CoMOF)nanosheets as passivation layers were in-situ constructed on the surface of Bi VO_(4)films through an uncomplicated hydrothermal method(Co-MOF/Bi VO_(4)).Under AM 1.5G illumination,synthesized CoMOF/BiVO_(4)electrode exhibited a 4-fold higher photocurrent than bare Bi VO_(4),measuring 6.0 m A/cm^(2)at 1.23 V *** in 1 mol/L potassium borate electrolyte(pH 9.5)***,the Co-MOF/BiVO_(4)film demonstrated a 96%charge separation efficiency,a result caused by an inhibited recombination rate of photogenerated electrons and holes by the addition of Co-MOF *** work provides an idea for depositing inexpensive 2D Co-MOF nanosheets on the photoanode as an excellent passivation layer for solar fuel production.

关键词： Photoelectrochemical BiVO_(4) Water splitting Co-MOF 2D nanosheets Charge separation