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Re-usable Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF piezo-photocatalytic film with exceptional hydrogen evolution capability triggered by the synergetic advantages of piezoelectricity and S-Scheme heterojunction

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Journal of Energy Chemistry 2024年第9期96卷 164-176页

作者： Ping Su Dong zhang Minghui Zhu Tengteng Liang Nan Yang Huaihao Zhao dafeng zhang Junchang Liu Peiqing Cai Xipeng Pu School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Science and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Sciencend TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018ZhejiangChina

Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic ***,polyvinylidene fluoride(PVDF),a flexible piezoelectric material,was introduced to synthesize a novel Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF(CZS-ZO@C/PVDF)piezo-photocatalytic film by spin coating and immersion phase conversion *** from the piezoelectricity of PVDF and the internal electric field(IEF)of CZS-ZO@C Step-scheme(S-Scheme)heterojunction,CZS-ZO@C/PVDF was able to induce a hydrogen generation rate of 34.9 mmol g^(−1)h^(−1)activated by ultrasound and visible light(U-L),which is∼17.5 times of Cd_(0.9)Zn_(0.1)S/PVDF(CZS/PVDF)and∼7.4 times of the photocatalysis rate activated by visible light only(L).Piezoelectric measurements and COMSOL simulation illustrated the excellent piezoelectricity of CZS-ZO@C/PVDF film,which exhibits a piezoelectric coefficient(d33)of 9.9 pm V−1 and a piezoelectric potential of 874 mV(under 0.5 MPa).The reaction mechanism for the exceptional piezo-photocatalytic performance was finally disclosed through density functional theory(DFT)calculation and electrochemical *** study enriches the application scope of piezoelectric materials in sustainable energy catalysis and provides a new direction to develop efficient piezoelectric photocatalysts.

关键词： Piezo-photocatalysis Heterojunction Cd_(0.9)Zn_(0.1)S Zno@c PVDF

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Rational construction of CuFe_(2)O_(4)@C/Cd_(0.9)Zn_(0.1)S S-scheme heterojunction photocatalyst for extraordinary photothermal-assisted photocatalytic H_(2) evolution

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Journal of Energy Chemistry 2024年第5期92卷 240-249页

作者： Dong zhang Minghui Zhu Ran Qin Peixian Chen Maoye Yin dafeng zhang Junchang Liu Hengshuai Li Xipeng Pu Peiqing Cai School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Science and TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018ZhejiangChina

Rational design of photocatalyst to maximize the use of sunlight is one of the issues to be solved in photocatalysis *** this study,the CuFe_(2)O_(4)@C/Cd_(0.9)Zn_(0.1)S(CFO@C/CZS)S-scheme photocatalyst with photothermal effect was synthesized by ultrasonic self-assembly combined with *** dark CFO@C absorbed visible light and partly converted into heat to promote the hydrogen evolution *** presence of heterojunctions inhibited the photogenerated electron-hole *** graphite-carbon layer provided a stable channel for electron transfer,and the presence of magnetic CFO made recycle *** the action of photothermal assistance and heterojunction,the hydrogen evolution rate of the optimal CFO@C/CZS was 80.79 mmol g^(-1) h^(-1),which was 2.55 times and 260.61 times of that of pure CZS and CFO@C,***,the composite samples also exhibit excellent stability and a wide range of environmental *** experimental tests and first-principles simulation calculation methods,the plausible mechanism of photoactivity enhancement was *** work provided a feasible strategy of photothermal assistance for the development of heterojunction photocatalysts with distinctive hydrogen evolution.

关键词： Photothermal effect S-scheme heterojunction Photocatalytic hydrogen evolution First-principles calculations

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绣球花状ZnIn_(2)S_(4)/CoWO_(4)S型异质结的构建及可见光催化产氢性能

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高等学校化学学报 2024年第5期45卷 81-91页

作者：赵玉彤王仕凯赵福萍陈志合赵丽杰张大凤葛博蒲锡鹏聊城大学材料科学与工程学院聊城252059

通过合理设计异质结结构来加速光催化产氢反应在高效光催化材料的开发中发挥着不可或缺的作用.ZnIn_(2)S_(4)(ZIS)由于其优异的光电性能和较负的导带位置,在光催化产氢领域受到了广泛关注,但其仍存在严重的光生载流子复合和团聚问题.为... 详细信息

通过合理设计异质结结构来加速光催化产氢反应在高效光催化材料的开发中发挥着不可或缺的作用.ZnIn_(2)S_(4)(ZIS)由于其优异的光电性能和较负的导带位置,在光催化产氢领域受到了广泛关注,但其仍存在严重的光生载流子复合和团聚问题.为此,首先通过理论计算预测了ZnIn_(2)S_(4)/CoWO_(4)(ZIS/CWO)S型异质结的能带结构及电子转移路径,并通过电子局域函数和电荷密度差分确定了异质结界面处的电子交换.随后,采用超声-搅拌-煅烧法将CWO纳米颗粒分散并负载到ZIS花球表面,获得了绣球花状ZIS/CWOS型异质结光催化剂.由于ZIS与CWO之间紧密的界面以及形成的内部电场,致使ZIS/CWOS型异质结的光生电子-空穴对得到了有效分离,进而提高了光催化产氢效率.同时,实验结果确定了S型异质结的形成和载流子的传输路径,揭示了光催化反应机理.

关键词：光催化产氢 S型异质结 ZnIn_(2)S_(4) CoWO_(4) 理论计算

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SnFe_(2)O_(4)/ZnIn_(2)S_(4)/PVDF piezophotocatalyst with improved photocatalytic hydrogen production by synergetic effects of heterojunction and piezoelectricity

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Journal of Advanced Ceramics 2023年第9期12卷 1685-1700页

作者： Ping Su Dezhi Kong Huaihao Zhao Shangkun Li dafeng zhang Xipeng Pu Changhua Su Peiqing Cai School of Materials Science and Engineering Shandong Key Laboratory of Chemical Energy Storage and New Battery TechnologyLiaocheng UniversityLiaocheng 252000China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China

The polarized electric field inside piezoelectric materials has been proven to be a promising technique to boost photogenerated charge ***,a novel flexible SnFe_(2)O_(4)/ZnIn_(2)S_(4)/polyvinylidene fluoride((CH2CF2)_(n),PVDF)(P-SZ)film piezophotocatalyst was successfully synthesized by combining PVDF,an organic piezoelectric material,with a SnFe_(2)O_(4)/ZnIn_(2)S_(4)(SFO/ZIS)type II heterojunction *** hydrogen evolution rate of SFO/ZIS heterojunction with a SFO content of 5%is about 846.79μmol·h^(−1)·g^(−1),which is 3.6 times that of pristine ***,after being combined with PVDF,the optimum hydrogen evolution rate of P-SZ is about 1652.7μmol·h^(−1)·g^(−1)in the presence of ultrasound,which exceeds that of 5%SFO/ZIS by an approximate factor of *** on experimental results,the mechanism of the improved photocatalytic performance of P-SZ was proposed on the basis of the piezoelectric field in PVDF and the formed heterojunction between SFO and ZIS,which effectively boosted the separation of photoinduced *** work provides an efficient strategy for multi-path collection and utilization of natural solar and vibrational energy to enhance photoactivity.

关键词： heterojunction piezophotocatalysis SnFe_(2)O_(4)(SFO) ZnIn_(2)S_(4)(ZIS) polyvinylidene fluoride((CH_(2)CF_(2))_(n),PVDF)film

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High-Performance Na-Ion Storage of S-Doped Porous Carbon Derived from Conjugated Microporous Polymers

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Nano-Micro Letters 2019年第4期11卷 84-96页

作者： Yuquan Li Bin Ni Xiaodan Li Xianghui Wang dafeng zhang Qingfei Zhao Jinliang Li Ting Lu Wenjie Mai Likun Pan Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal University3663 N.Zhongshan Rd.Shanghai 200062People’s Republic of China Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongPeople’s Republic of China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000ShandongPeople’s Republic of China Department of Chemical Engineering School of Environmental and Chemical EngineeringShanghai University99 Shangda RoadShanghai 200444People’s Republic of China Testing and Analysis Centre College of Chemistry and Materials ScienceShanghai Normal University100 Guilin RoadShanghai 200234People’s Republic of China

Na-ion batteries(NIBs)have attracted considerable attention in recent years owing to the high abundance and low cost of *** is well known that S doping can improve the electrochemical performance of carbon materials for ***,the current methods for S doping in carbons normally involve toxic precursors or rigorous *** this work,we report a creative and facile strategy for preparing S-doped porous carbons(SCs)via the pyrolysis of conjugated microporous polymers(CMPs).Briefly,thiophene-based CMPs served as the precursors and doping sources *** direct carbonization of CMPs produced S-doped carbon materials with highly porous *** used as an anode for NIBs,the SCs exhibited a high reversible capacity of 440 mAh g?1 at 50 mA g?1 after 100 cycles,superior rate capability,and excellent cycling stability(297 mAh g?1 after 1000 cycles at 500 mA g?1),outperforming most S-doped carbon materials reported thus *** excellent performance of the SCs is attributed to the expanded lattice distance after S ***,we employed ex situ X-ray photoelectron spectroscopy to investigate the electrochemical reaction mechanism of the SCs during sodiation-desodiation,which can highlight the role of doped S for Na-ion storage.

关键词： Conjugated microporous polymer S-doped porous carbons Na-ion batteries Reaction mechanism

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Coralline-like Ni_(2)P decorated novel tetrapod-bundle Cd_(0.9)Zn_(0.1)S ZB/WZ homojunctions for highly efficient visible-light photocatalytic hydrogen evolution

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Chinese Journal of Catalysis 2021年第3期42卷 439-449页

作者： Zhuwang Shao Xiao Meng Hong Lai dafeng zhang Xipeng Pu Changhua Su Hong Li Xiaozhen Ren Yanling Geng School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina State Key Laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

In this study,Ni_(2)P-Cd_(0.9)Zn_(0.1)S(NPCZS)composites were synthesized by coupling tetrapod bundle Cd_(0.9)Zn_(0.1)S(CZS)and coralline-like Ni_(2)P(NP)via a simple calcination *** shows outstanding activity in photocatalytic hydrogen evolution(1.31 mmol h^(‒1)),owing to its unique morphology and heterophase homojunctions(ZB/WZ),which accelerate the separation and transfer of photogenerated *** coupling with NP,the photoactivity of NPCZS was enhanced,and the maximum hydrogen evolution rate of 1.88 mmol h^(‒1)was reached at a NP content of 12 wt%,which was 1.43 times higher than that of pure *** experimental results of the photocatalytic activity,*** spectra,surface photovoltage spectra,and electrochemical test showed that the enhanced photoactivity of NPCZS should be attributed to the synergistic effects of the novel tetrapod-bundle morphology,heterophase homojunctions,and decoration of the NP ***,the as-prepared NPCZS composites exhibited excellent photostability and ***,we propose a possible mechanism for the enhanced photocatalytic activity.

关键词： Photocatalytic hydrogen evolution Cd_(0.9)Zn_(0.1)S Ni_(2)P Homojunctions Noble-metal-free

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Cu_(3)Mo_(2)O_(9)/Mn_(0.3)Cd_(0.7)S S型异质结的构筑及其光解水产氢性能研究

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聊城大学学报（自然科学版） 2024年第1期37卷 52-61页

作者：于佳慧姚欣彤苏萍王仕凯张大凤葛博蒲锡鹏聊城大学材料科学与工程学院山东聊城252059

采用超声辅助研磨煅烧法制备了Cu_(3)Mo_(2)O_(9)/Mn_(0.3)Cd_(0.7)S S型异质结光催化剂,通过X射线粉末衍射仪、扫描电子显微镜、X射线光电子能谱、固体紫外漫反射等测试技术表征了样品的物相、形貌、化学元素组成以及光吸收能力等物理... 详细信息

采用超声辅助研磨煅烧法制备了Cu_(3)Mo_(2)O_(9)/Mn_(0.3)Cd_(0.7)S S型异质结光催化剂,通过X射线粉末衍射仪、扫描电子显微镜、X射线光电子能谱、固体紫外漫反射等测试技术表征了样品的物相、形貌、化学元素组成以及光吸收能力等物理化学性质。在可见光加近红外光照射下进行了光催化析氢性能测试,结果表明,Cu_(3)Mo_(2)O_(9)/Mn_(0.3)Cd_(0.7)S复合材料的光解水产氢性能均优于纯相的Mn_(0.3)Cd_(0.7)S和Cu_(3)Mo_(2)O_(9),其中Cu 3Mo 2O 9的质量分数为1%的Cu_(3)Mo_(2)O_(9)/Mn_(0.3)Cd_(0.7)S显示出最佳的产氢速率(1.554 mmol·h^(-1)·g^(-1)),是Mn 0.3 Cd_(0.7)S的5.5倍。且经过四次循环实验后仍保持较好的光催化活性。此外,根据电化学测试以及红外热成像结果提出了合理的机理,Cu 3Mo 2O 9的光热效应与S型异质结的协同作用是Cu_(3)Mo_(2)O_(9)/Mn_(0.3)Cd_(0.7)S光催化活性提高的关键。

关键词：光解水产氢 S型异质结 Mn_(0.3)Cd_(0.7)S Cu_(3)Mo_(2)O_(9) 光热效应

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Photoluminescence Properties of NaLu1-xEux（WO4）2 Novel Red Phosphors Synthesized by Combustion Method

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环境科学前沿（中英文版） 2014年第1期3卷 1-5页

作者： dafeng zhang Jianxiu Liu Xipeng Pu School of Materials Science and Engineering Liaocheng University Liaocheng 252000 P. R. China

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Coupling effects of Zn single atom and high curvature supports for improved performance of CO_(2) reduction

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Science Bulletin 2021年第16期66卷 1649-1658,M0004页

作者： Zhongjing Hao Junxiang Chen dafeng zhang Lirong Zheng Yueming Li Zi Yin Gang He Lei Jiao Zhenhai Wen Xiao-Jun Lv State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New EnergyNorth China Electric Power UniversityBeijing 102206China State Key Laboratory of Metastable Materials Science and Technology College of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Province Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Department of Energy and Chemical Engineering College of Chemistry and Chemical EngineeringHenan Key Laboratory of Coal Green ConversionHenan Polytechnic UniversityJiaozuo 454003China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Single-atom catalysts(SACs)have emerged as one of the most competitive catalysts toward a variety of important electrochemical reactions,thanks to their maximum atom economy,unique electronic and geometric ***,the role of SACs supports on the catalytic performance does not receive enough research ***,we report an efficient route for synthesis of single atom Zn loading on the N-doped carbon nano-onions(ZnN/CNO).ZnN/CNO catalysts show an excellent high selectivity for CO_(2) electro-reduction to CO with a Faradaic efficiency of CO(FECO)up to 97%at -0.47 V(*** hydrogen electrode,RHE)and remarkable durability without activity *** our knowledge,ZnN/CNO is the best activity for the Zn based catalysts up to now,and superior to single atom Zn loading on the two-dimensional planar and porous structure of graphene substrate,although the graphene with larger surface *** exact role of such carbon nano-onions(CNO)support is studied systematically by coupling characterizations and electrochemistry with density functional theory(DFT)calculations,which have attributed such good performance to the increased *** increased curvature modifies the surface charge,which then changes the adsorption energies of key intermediates,and improves the selectivity for CO generation accordingly.

关键词： Single-atom catalysts Highly curved substrate Electrocatalytic CO_(2) reductions High activity and selectivity Coupling effect

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考虑固结过程的单桩负摩擦数值模型

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清华大学学报（自然科学版） 2015年第12期55卷 1276-1280页

作者：杨军张大峰清华大学土木工程系土木工程安全与耐久教育部重点实验室北京100084

该文旨在建立考虑地基土固结过程的桩基负摩擦计算模型。基于岩土工程有限元软件Plaxis建立有限元模型,并使用换土法模拟离心机加速前土的欠固结状态,进而模拟试验负摩擦发展过程。计算结果表明:该模型计算精度较高,固结完成时远端土的... 详细信息

该文旨在建立考虑地基土固结过程的桩基负摩擦计算模型。基于岩土工程有限元软件Plaxis建立有限元模型,并使用换土法模拟离心机加速前土的欠固结状态,进而模拟试验负摩擦发展过程。计算结果表明:该模型计算精度较高,固结完成时远端土的沉降计算误差为6.8%,桩基沉降和轴力的计算误差分别为34.7%和18.3%;此外,不同固结时刻下的超静孔压以及桩基最大轴力相对值与离心机试验数据吻合,且桩基轴力均近似与时间的平方根成线性关系。该模型可为考虑地基图固结的桩基负摩擦问题的计算提供参考。

关键词：单桩负摩擦固结数值模型离心机试验

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