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Journal of Materials Science & Technology 2020年第19期54卷 20-30页

作者： Qianqian Liu Quan Zhang Lu Zhang wei-lin dai School of Chemistry Biology and Materials EngineeringSuzhou University of Science and TechnologySuzhou 215009China Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200433China

For the first time in this work,we manage to synthesize single-crystalline NaNb_(0.875)Ta_(0.125)O_(3) wires by combining the advantages of one-dimensional(1 D)nanostructure and heteroatom doping *** Ta doping was performed to figure out the correlation between morphological and structural evolution as well as the photocatalytic performance towards H2 *** was found that,the as-prepared NaNb_(0.875)Ta_(0.125)O_(3) wires presented a highest and stable photocatalytic performance,which was appropriately 41 and 2 folds higher than that of bare Na TaO_(3) and Na *** optical activity was mainly ascribed to the synergistic effect between appropriate Ta doping and perfect 1 D wire-like morphology,which resulted in fewer defects,improved charge transfer efficiency and higher reduction capability of *** the other hand,a possible photocatalytic mechanism of photocatalytic H_(2) production was proposed in *** work creates a new perspective into designing multi-component materials and understanding the mechanism of H_(2) evolution,which offers new opportunities for solar-energy conversion.

关键词： NaNb_(0.875)Ta_(0.125)O_(3)wires Single crystal Ta-doping effect Photocatalytic H2 production Mechanism

Facile oxalic acid-assisted construction of laminated porous N-deficient graphitic carbon nitride: Highly efficient visible-light-driven hydrogen evolution photocatalyst

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Journal of Energy Chemistry 2019年第6期28卷 1-8页

作者： Fengli Yang Jia Ren Qianqian Liu Lu Zhang Yuanyuan Chai wei-lin dai Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University

The laminated porous N-deficient g-C3N4(CN–H)is successfully synthesized by a facile two-step hydrothermal calcination method using oxalic acid-assisted melamine as the *** with pristine g-C3N4(224μmol g-1h-1),the CN–H shows superior photocatalytic hydrogen production activity(up to 728μmol g-1h-1),which is three times higher than the unmodified *** draw out the multifaceted influences of oxalic acid modification on the visible-light-induced photocatalytic activity,various techniques are utilized to investigate the formation mechanism,structural characteristics and photoelectrical properties of CN–*** results indicate that the addition of a trace amount of oxalic acid to the precursor melamine results in a g-C3N4 structure possessing the advantage of both nitrogen defects and laminated *** properties can enlarge specific surface areas of g-C3N4,enhance an efficient separating of photogenerated electron-hole pairs and extend the range of spectral response,all contributing to the enhancement of the visible-light-induced photocatalytic activity.

关键词： Oxalic acid Melamine Laminated porous N-deficient g-C3N4 Visible-light-induced photocatalytic activity for H2 generation

Structure Engineered g-C3N4 Nano-Sheets by Switching the Pyrolysis Gas Atmosphere for Enhanced Photo-Catalytic Degradation

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Chinese Journal of Chemistry 2017年第2期35卷 173-182页

作者： Yuanyuan Chai Qianqian Liu Lu Zhang Jia Ren wei-lin dai Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200433 China

We developed a new one step approach to synthesize g-C3N4 nano-sheets by direct thermal pyrolysis process of urea in NH3 atmosphere. For the first time, the influence of the preparation gas atmosphere on the composition, crystalline and polymerization degree, and the activity of the g-C3N4 synthesized from thermal condensation of urea was investigated. Impressively, the g-C3N4 nano-sheets obtained under NH3 gas atmosphere exhibited much superi- or photo-catalytic activities to the prepared g-C3N4 in air or N2, and the rate of the g-C3N4-NH3 was about 5 times higher than that on g-C3N4-N2 sample. The detailed characterization analysis revealed that NH3 thermal pyrolysis atmosphere contributed to the polymerization degree and the formation of the layer with a more regular structure due to the efficiently extending of the conjugated π-conjugative system, which was favorable to the transfer of the photo-induced charge carriers. Furthermore, we studied in depth the structure-performance relationship in the sys- tem, and it was found that the synergistic effect of the larger surface area, the adjusted band energy structure and the well crystallization may be conductive to the higher separation of the electron-hole pair, thus leading to the won- derful performance for the g-C3N4-NH3. Notably, the method has the merits of low cost, scalable production and environmental friendliness.

关键词： g-C3N4 nano-sheets NH3 urea photo-catalyst

Electroless-hydrothermal construction of nickel bridged nickel sulfide@mesoporous carbon nitride hybrids for highly efficient noble metal-free photocatalytic H2 production

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Journal of Materials Science & Technology 2020年第10期42卷 176-186页

作者： Lu Zhang Yuanyuan Cui Fengli Yang Quan Zhang Juhua Zhang Mengting Cao wei-lin dai Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai200433China Shimadzu China Co.LTD. Shanghai200233China

Metallic Ni bridged Ni S@mesoporous carbon nitride hybrids were for the first time fabricated through a one-pot electroless-assisted hydrothermal *** intimate Ni bridge between the interface of mesoporous carbon nitride and Ni S was confirmed by HRTEM and in-depth XPS analysis using an Ar+-cluster sputtering gun and a possible mechanism was put forward to elucidate the formation process of the unique *** adding any noble metals as cocatalysts,the optimized catalyst 10%NiS/mCN-160-12 showed a H2 evolution rate of 1419μmol·g^-1·h^-1,which is about 34 and 14 fold higher than that of bare mesoporous carbon nitride and Ni S,*** dramatically enhanced photocatalytic performance was mainly ascribed to the synergistic effect of Ni S cocatalyst loading and the formation of metallic Ni between the interface of mesoporous carbon nitride and Ni S,which served as a charge-transfer bridge to facilitate the transfer and separation of photo-induced electron-hole pairs.

关键词： Electroless-hydrothermal method Hydrogen production NiS/mesoporous carbon nitride Hybrids photocatalysts

Highly efficient Ag-modified copper phyllosilicate nanotube:Preparation by co-ammonia evaporation hydrothermal method and application in the selective hydrogenation of carbonate

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Journal of Materials Science & Technology 2020年第12期47卷 29-37页

作者： Huabo Li Yuanyuan Cui Yixin Liu Lu Zhang Quan Zhang Juhua Zhang wei-lin dai Department of Chemistry&Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai200438China School of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyEastern Hualan AvenueXinxiang453000China

Rapidly deactivation of Cu/SiO2 catalysts at high liquid hour space velocity(LHSV) has been an important obstacle for scale-up ***,silver modified copper phyllosilicate nanotubes were fabricated by different strategies,and implemented to the selective hydrogenation of ethylene carbonate(EC) to methanol and ethylene glycol(EG) as alternative route for the indirect utilization of *** CuPs Ag-copre catalyst synthesized by the co-ammonia evaporation hydrothermal process achieved79% methanol and 99% EG yield within various ranges of EC LHSV,which was attributed to the balanced Cu+/CuO ratio and the enhanced H2 dissociation *** silver species over copper phyllosilicate promoted the interaction between the metal and the support,which substantially regulated the reducibility and dispersion of copper species,meanwhile,increased the stability for long-term running of the catalyst.

关键词： Copper Silver Carbonate Hydrogenation Methanol Ethylene glycol

Facile construction of highly efficient MOF-based Pd@UiO-66-NH_(2)@ZnIn_(2)S_(4)flower-like nanocomposites for visible-light-driven photocatalytic hydrogen production

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Journal of Materials Science & Technology 2021年第17期76卷 189-199页

作者： Mengting Cao Fengli Yang Quan Zhang Juhua Zhang Lu Zhang lingfeng Li Xiaohao Wang wei-lin dai Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200438China

Construction of metal-organic-frame works-based composite photocatalysts has attracted much attention for the reasonable band gap and high surface areas to improve the photocatalytic *** this study,the ternary heterojunction Pd@UiO-66-NH_(2)@ZnIn_(2)S_(4)nanocomposites were facilely prepared for the first time by a two-step *** visible-light-promoted hydrogen production rate of 0.3%Pd@UiO-66-NH_(2)@ZnIn_(2)S_(4)reaches up to 5.26 mmol g^(-1)h^(-1),which is evidently much higher than pure UiO-66-NH_(2),ZnIn_(2)S_(4)and binary UiO-66-NH_(2)/ZnIn_(2)S_(4)*** a huge improvement in the photocatalytic performance is mainly attributed to the matched band gap of ZnIn_(2)S_(4)and UiO-66-NH_(2),and the introduction of Pd NPs into photocatalysts that broaden spectral response range and promote the photon induced charge carrier *** work may provide a feasible approach for the design and construction of metal-organic-frameworks-based photocatalytic materials.

关键词： Metal-organic frameworks(MOFs) UiO-66-NH_(2) ZnIn_(2)S_4 Pd nanoparticles Photocatalytic hydrogen production

One step method of structure engineering porous graphitic carbon nitride for efficient visible-light photocatalytic reduction of Cr(Ⅵ)

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Journal of Materials Science & Technology 2021年第12期71卷 211-220页

作者： Xueru Chen Yin Zhang Dashui Yuan Wu Huang Jing Ding Hui Wan wei-lin dai Guofeng Guan State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 210009China Department of Chemistry&Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200433China

Porous g-C_(3)N_(4)nanosheets(PCN)were prepared by the nickel-assisted one-step thermal polymerization ***(H2)which was produced by the reaction between nickel(Ni)foam and ammonia(NH3)defined the structure and properties of *** the formation of PCN,the participation of H2 not only enhanced the spacing between layers but also boosted the specific surface area that more active sites were ***,H2 promoted pores formation in the nanosheets,which was beneficial to the transfer of photons through lamellar structure and improved the absorption efficiency of visible ***,the obtained PCN possessed better Cr(Ⅵ)photocatalytic reduction efficiency than pure g-C_(3)N_(4).The reaction rate constant(k)of PCN(0.013 min-1)was approximately twice that of bare g-C_(3)N_(4)(0.007 min-1).Furthermore,the effects of original pH and concentration of Cr(Ⅵ)-containing solution on re moval efficiency of Cr(Ⅵ)were explored.A possible photocatalytic mecha nism was proposed based on the experiments of radical scavengers and photoelectrochemical characterizations.

关键词： Porous carbon nitride Nickel foam Hydrogen Cr(VI) Photocatalysis

Morphology and crystal-plane effects of Zr-doped CeO2 nanocrystals on the epoxidation of styrene with tert-butylhydroperoxide as the oxidant

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Journal of Energy Chemistry 2017年第4期26卷 681-687页

作者： Jia Ren Xin Liu Ruihua Gao wei-lin dai Department of Chemistry&Shanghai Key Laboratory of Molecular Catalysis and Innovative Material Fudan UniversityShanghai 200433China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China

The morphology effect of Zr-doped CeOwas studied in terms of their activities in the selective oxidation of styrene to styrene oxide using tert-butyl hydroperoxide as the oxidant. In the present work, Zrdoped CeOnanorods exhibited the highest catalytic performance（yield of styrene oxide and TOF value）followed by nanoparticles and nanocubes. For the Zr-doped CeOnanorods, the apparent activation energy is 56.3 k J/mol, which is much lower than the values of catalysts supported on nanoparticles and nanocubes（73.3 and 93.4 k J/mol）. The high resolution transmission electron microscopy results indicated that（100） and（110） crystal planes are predominantly exposed for Zr-doped CeOnanorods while（100）and（111） for nanocubes,（111） for nanoparticles. The remarkably increased catalytic activity of the Zrdoped CeOnanorods is mainly attributed to the higher percentage of Cespecies and more oxygen vacancies, which are associated with their exposed（100） and（110） crystal planes. Furthermore, recycling studies proved that the heterogeneous Zr-doped CeOnanorods did not lose its initial high catalytic activity after five successive recycles.

关键词： Morphology effect Zr-doped CeO2 Styrene Selective oxidation Oxygen vacancies

THE CAUCHY TYPE INTEGRAL FOR M-ANALYTIC FUNCTION AND ITS APPLICATION

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Acta Mathematica Scientia 1990年第2期10卷 149-166页

作者：林伟戴道清 ZHONGSHAN UNIV DEPT MATHGUANGZHOUPEOPLES R CHINA

In this paper, the Cauchy type integral for M-analytic function is investigated which is by definition the regular solution of the elliptic system f_x+Mf_y=0, where M is a constant m×m matrix without any real eigenva... 详细信息

关键词： Pr THE CAUCHY TYPE INTEGRAL FOR M-ANALYTIC FUNCTION AND ITS APPLICATION

苯甲醇氧化制苯甲酸钠反应中金钯双金属催化剂的协同效应

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催化学报 2014年第11期35卷 1846-1857页

作者：张召艳王英李娴戴维林复旦大学化学系上海市分子催化和功能材料重点实验室上海200433

研究了不同Au/Pd摩尔比的AuPd/CeO2双金属催化剂在苯甲醇氧化制苯甲酸及其钠盐反应中的催化活性,利用XRD,UV-Vis DRS,TEM和XPS等手段对催化剂的结构进行了系统考察.结果表明,Au-Pd纳米颗粒以合金形式分散在CeO2载体上,不同Au/Pd摩尔比... 详细信息

研究了不同Au/Pd摩尔比的AuPd/CeO2双金属催化剂在苯甲醇氧化制苯甲酸及其钠盐反应中的催化活性,利用XRD,UV-Vis DRS,TEM和XPS等手段对催化剂的结构进行了系统考察.结果表明,Au-Pd纳米颗粒以合金形式分散在CeO2载体上,不同Au/Pd摩尔比会影响催化剂表面活性物种的粒径大小和尺寸分布,并改变催化剂表面物种的组成.Au-Pd之间的电子效应和协同效应显著影响其催化活性.当Au/Pd摩尔比为3时催化剂表现出最好的催化活性,苯甲酸产率可达92%.此外,双金属催化剂的催化活性显著优于单金属催化剂,主要归因于Au和Pd之间的协同效应.AuPd/CeO2催化剂还具有良好的稳定性,Au/Pd摩尔比为3的AuPd/CeO2催化剂使用7次后仍然具有较高的催化活性.

关键词：金钯氧化铈双金属催化剂苯甲醇催化氧化苯甲酸盐