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In Situ Synthesis of Cu_(3)P/P-doped g-C_(3)N_(4)Tight 2d/2d heterojunction Boosting Photocatalytic H2 Evolution

Chinese Journal of Chemistry 2023年第2期41卷 173-180页

作者： Fangyong Hou Feng Liu Haochen Wu Muhammad Qasim Yi Chen Yang duan Zhibo Feng Maochang Liu International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'anShaanxi 710049China School of Electronic Engineering Jiujiang UniversityJiujiangJiangxi 332005China Gree Altairnano New Energy Inc ZhuhaiGuangdong 519040China Suzhou Academy of Xi'an Jiao tong University SuzhouJiangsu 215123China

heterojunction design in a two-dimensional(2d)fashion has been deemed beneficial for improving the photocatalytic activity of g-C_(3)N_(4)because of the promoted interfacial charge transfer,yet still facing challenges.Herein,we construct a novel 2d/2d Cu_(3)P nanosheet/P-doped g-C_(3)N_(4)(PCN)nanosheet heterojunction photocatalyst(PCN/Cu_(3)P)through a simple in-situ phosphorization treatment of 2d/2d CuS/g-C_(3)N_(4)composite for photocatalytic H2 evolution.We demonstrate that the 2d lamellar structure of both CuS and g-C_(3)N_(4)could be well reserved in the phosphorization process,while CuS and g-C_(3)N_(4)in-situ transformed into Cu_(3)P and PCN,respectively,leading to the formation of PCN/Cu_(3)P tight 2d/2d heterojunction.Owing to the large contact area provided by intimate face-to-face 2d/2d structure,the PCN/Cu_(3)P photocatalyst exhibits significantly enhanced charge separation efficiency,thus achieving a boosted visible-light-driven photocatalytic behavior.The highest rate for H2 evolution reaches 5.12 umol·h^(-1),nearly 24 times and 368 times higher than that of pristine PCN and g-C_(3)N_(4),respectively.This work represents an excellent example in elaborately con-structing g-C_(3)N_(4)-based 2d/2d heterostructure and could be extended to other photocatalyst/co-catalyst system.

关键词： Photocatalysis Water splitting 2d/2d heterojunction g-C_(3)N_(4) Energy conversion Charge transfer Nanosheet photocatalyst

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2d/2d hierarchical Co_(3)O_(4)/ZnIn_(2)S_(4)heterojunction with robust builtin electric field for efficient photocatalytic hydrogen evolution

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Nano Research 2023年第5期16卷 6134-6141页

作者： Guping Zhang Xunxun Li Mengmeng Wang Xueqing Li Yaru Wang Shuting Huang dongyun Chen Najun Li Qingfeng Xu Hua Li Jianmei Lu College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

Because of its importance in enhancing charge separation and transfer,built-in electric field engineering has been acknowledged as an effective technique for improving photocatalytic performance.Herein,a stable p–n heterojunction of 2d/2d(2d:twodimensional)Co_(3)O_(4)/ZnIn_(2)S_(4)with a strong built-in electric field is precisely constructed.The Co_(3)O_(4)/ZnIn_(2)S_(4)heterojunction exhibits a higher visible-light photocatalytic hydrogen(H2)evolution rate than the individual components,which is primarily attributed to the synergy effect of improved light absorption,abundant active sites,short charge transport distance,high separation efficiency of photogenerated carriers.Furthermore,the photoelectrochemical studies and density functional theory(dFT)calculation results demonstrate that the enhanced interfacial charge separation and migration induced by the generated built-in electric field are the critical reasons for the boosted photocatalytic performance.This research might pave the way for the rational design and manufacturing of 2d/2d heterojunction photocatalysts with extremely efficient photocatalytic performance for solar energy conversion.

关键词： 2d/2d heterojunction photocatalysis built-in electric field interfacial charge transfer H_(2)evolution

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2d/2d BiOIO_(3)/g-C_(3)N_(4) S-scheme hybrid heterojunction with face-to-face interfacial contact for effective photocatalytic H_(2) production and norfloxacin degradation

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Journal of Materials Science & Technology 2023年第17期148卷 19-30页

作者： dong-Eun Lee Satyanarayana Moru KasalaPrabhakar Reddy Wan-Kuen Jo Surendar Tonda School of Architecture CivilEnvironmental and Energy EngineeringKyungpook National University80 Daehak-roBuk-guDaegu 41566Republic of Korea School of Advanced Sciences Vellore Institute of Technology-Andhra Pradesh(VIT-AP University)AmaravatiAndhra Pradesh 522237India department of Chemistry and Biochemistry University of South Carolina631 Sumter StreetColumbiaSC 29208United States

A two-dimensional(2d)/2d hybrid heterojunction with face-to-face interfacial assembly is a desirable dimensionality design with significant potential for various photocatalytic applications due to the large interfacial contact area,which facilitates charge migration and separation.Herein,we developed an ef-ficient 2d/2d hybrid heterojunction consisting of BiOIO 3 nanoplates(BIO)and g-C_(3)N_(4) nanosheets(CN)using a simple but effective in situ growth method for photocatalytic aqueous antibiotic degradation and H_(2) generation.The face-to-face interfacial assembly of the BIO and CN components in the BIO/CN hy-brid heterojunction was verified using electron microscopy.Remarkably,the BIO/CN hybrid heterojunc-tion outperformed both the BIO and CN counterparts in terms of norfloxacin degradation and H_(2) gen-eration under simulated solar light irradiation.Moreover,the photocatalytic performance of the hybrid catalyst remained nearly unchanged throughout five consecutive test runs.The exceptional performance and stability of the hybrid catalyst are attributable to its extended optical absorption range,large interfa-cial contact area provided by the face-to-face assembly in the 2d/2d hybrid configuration,and enhanced photoexcited charge separation efficiency and redox power of the separated charges,which are supported by an efficient S-scheme charge transfer mechanism.This study illuminates the rational construction of novel 2d/2d S-scheme hybrid heterojunction photocatalysts with practical applications in environmental remediation and sustainable energy generation.

关键词： g-C_(3)N_(4) BiOIO_(3) Face-to-face interface 2d/2d heterojunction S-scheme charge transfer Solar energy conversion

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Face-to-face heterojunctions within 2d/2d porous NiCo oxyphosphide/g-C_(3)N_(4)towards efficient and stable photocatalytic H_(2)evolution

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Nano Research 2023年第5期16卷 6568-6576页

作者： Genrui Zhang Xiaojing Li Na Li Tingting Wu Lei Wang Key Laboratory of Eco-chemical Engineering Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life ScienceTaishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and TechnologyQingdao University of Science and TechnologyQingdao 266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China

Constructing 2d/2d face-to-face heterojunctions is believed to be an effective strategy to enhance photocatalytic performance due to the enlarged contact interface and increased surface active sites.Herein,2d porous NiCo oxyphosphide(NiCoOP)was synthesized for the first time and coupled with graphitic carbon nitride(g-C_(3)N_(4))nanosheets to form 2d/2d heterojunctions via an in-situ phosphating method.The optimal 4 wt.%2d/2d NiCoOP/g-C_(3)N_(4)(OPCN)photocatalyst achieves a hydrogen evolution rate of 1.4 mmol·h^(−1)·g^(−1),which is 33 times higher than that of pure g-C_(3)N_(4).The greatly improved photocatalytic performance of the composite photocatalysts could be attributed to the formation of interfacial surface bonding states and sufficient charge transfer channels for accelerating carrier separation and transfer and the porous structure of NiCoOP nanosheets with abundant surface active sites for promoting surface reactions.Amazingly,the 2d/2d OPCN composite photocatalysts also exhibit superior stability during photocatalytic reactions.This study not only designs new noble-metal-free NiCoOP/g-C_(3)N_(4)composite photocatalysts but also provides a new sight in fabricating face-to-face 2d/2d heterojunctions for their application in energy conversion areas.

关键词： 2d porous NiCo oxyphosphide(NiCoOP) graphitic carbon nitride(g-C_(3)N_(4))nanosheets 2d/2d heterojunction photocatalyst hydrogen evolution

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Highly efficient charge separation and transfer at 2d/2d N doped La2Ti2O7 nanosheets/ZnIn2S4 nanosheets heterojunction interface

Highly efficient charge separation and transfer at 2D/2D N d...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Mengyang Xia Guidong Yang Xi’an Jiaotong University

LaTiO,as a perovskite-type layer-structured material,has a wide applications in photocatalytic hydrogen production.However,the wide band gap(3.6 eV) of LaTiO and the high electron and hole pairs recombination rate which severely limits its practical photocatalysis applications.On this issue,we design the 2 d/2 d heterojunction and adjust the electronic band structure of LaTiO by nitrogen doping.We first report a novel 2 d/2 d N-LaTiO/ZnInS heterojunction via in-situ growing abundant well-dispersed ZnInS nanosheets on the N-LaTiO nanosheets.The experimental results show that the optimized 2 d/2 d N-LaTiO/ZnInS sample exhibits the best light-driven H evolution activity,which is nearly 5.2 higher than that of pristine ZnInS nanosheets.This is due to the unique 2 d/2 d heterojunction can produce massive high-speed charge transfer channels,thus significantly enhancing photo-carriers separation efficiency.Meanwhile,the dFT calculations confirm that nitrogen doping would form the impurity energy states at the top of valence band,thus narrowing the band gap of LaTiO.This report will hopefully provide a practical strategy for designing heterojunction composite for hydrogen evolution.

关键词： Nitrogen doped La2Ti2O7 2d/2d heterojunction Photocatalytic hydrogen evolution

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