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Nano Materials Science 2023年第2期5卷 202-209页

作者： zhangqian liang Yanjun Xue Xinyu Wang Xiaoli Zhang Jian Tian Hongzhi Cui School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

2D-layered graphitic carbon nitride(g-C_(3)N_(4))is regarded as a great prospect as a photocatalyst for H_(2)***,g-C_(3)N_(4)’s photocatalytic hydrogen evolution(HER)activity is significantly restricted by the recombination of *** find that cobalt sulfide(CoS_(2))as a cocatalyst can promote g-C_(3)N_(4)nanosheets(NSs)to realize very efficient photocatalytic H_(2)*** prepared CoS_(2)/g-C_(3)N_(4)hybrids display highly boosted photocatalytic H_(2)generation performance and outstanding cycle *** optimized 7%-CoS_(2)/g-C_(3)N_(4)hybrids show a much improved photocatalytic H_(2)generation rate of 36.2μmol-1h-1,which is about 180 times as much as bare g-C_(3)N_(4)(0.2μmol-1h-1).In addition,the apparent quantum efficiency(AQE)of all the samples was computed under light atλ=370 nm,in which the AQE of 7%-CoS_(2)/g-C_(3)N_(4)hybrids is up to 5.72%.The experimental data and the DFT calculation suggest that the CoS_(2)/g-C_(3)N_(4)hybrid’s excellent HER activity is attributable to the lower overpotential and the smaller Co-H bond activation energy for ***,the CoS_(2)cocatalyst loading effectively boosts the photocatalytic performance of g-C_(3)N_(4)for H_(2)*** project promotes fast development of high-efficiency photocatalysts and low-cost for photocatalytic H_(2)generation.

关键词： Non-precious-metal cocatalysts Photocatalytic hydrogen evolution reaction CoS_(2)cocatalysts 2D-layered g-C_(3)N_(4)

Photocatalytic H2 Evolution on TiO2 Assembled with Ti3C2 MXene and Metallic 1T-WS2 as Co-catalysts

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Nano-Micro Letters 2020年第1期12卷 63-74页

作者： Yujie Li Lei Ding Shujun Yin zhangqian liang Yanjun Xue Xinzhen Wang Hongzhi Cui Jian Tian School of Materials Science and Engineering Shandong University of Science and Technology

The biggest challenging issue in photocatalysis is efficient separation of the photoinduced carriers and the aggregation of photoexcited electrons on photocatalyst’s *** this paper,we report that double metallic co-catalysts Ti3C2 MXene and metallic octahedral(1T)phase tungsten disulfide(WS2)act pathways transferring photoexcited electrons in assisting the photocatalytic H2 ***2 nanosheets were in situ grown on highly conductive Ti3C2 MXenes and 1T-WS2 nanoparticles were then uniformly distributed on TiO2@Ti3C2 ***,a distinctive 1T-WS2@TiO2@Ti3C2 composite with double metallic co-catalysts was achieved,and the content of 1T phase reaches 73%.The photocatalytic H2 evolution performance of 1T-WS2@TiO2@Ti3C2 composite with an optimized 15 wt%WS2 ratio is nearly 50 times higher than that of TiO2 nanosheets because of conductive Ti3C2 MXene and 1T-WS2 resulting in the increase of electron transfer ***,the 1T-WS2 on the surface of TiO2@Ti3C2 composite enhances the Brunauer–Emmett–Teller surface area and boosts the density of active site.

关键词： Photocatalytic H2 production Ti3C2 MXene Octahedral phase WS2 TiO2 nanosheets Co-catalysts

Synthesis of porous few-layer carbon nitride with excellent photocatalytic nitrogen fixation

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Journal of Materiomics 2020年第1期6卷 128-137页

作者： Yanjun Xue Xiangkun Kong Yichen Guo zhangqian liang Hongzhi Cui Jian Tian School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China

The porous few-layer g-C_(3)N_(4)(PFL-g-C_(3)N_(4))is prepared by a simple molecular self-assembly *** with pure g-C_(3)N_(4),the as-prepared PFL-g-C_(3)N_(4) is ultrathin,the surface is rich in pores,and the photocatalytic nitrogen fixation activity is greatly increased to 8.20 mM h^(-1) gCat^(-1).Few-layer and ultrathin nature of PFL-g-C_(3)N_(4) can provide a larger specific surface area,expose more active sites,and reduce the diffusion path of charges and protons from the inside to the *** addition,the porous structure can narrow the band gap,thereby increasing the light absorption range and enhancing the light absorption ***,the presence of nitrogen vacancies causes PFL-g-C_(3)N_(4) to move to a more negative conductive band *** importantly,the isotopic experiments using ^(15)N_(2) as nitrogen source confirm the ammonia production originating from N2 rather than the decomposition of g-C_(3)N_(4).Therefore,PFL-g-C_(3)N_(4) can greatly improve the efficiency of visible light photocatalytic nitrogen fixation.

关键词： Molecular self-assembly g-C_(3)N_(4) Porous structure Nitrogen vacancies Photocatalytic nitrogen fixation

Au nanorods decorated TiO_(2)nanobelts with enhanced full solar spectrum photocatalytic antibacterial activity and the sterilization file cabinet application

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Chinese Chemical Letters 2021年第4期32卷 1523-1526页

作者： Yingying Qin Yichen Guo zhangqian liang Yanjun Xue Xiaoli Zhang Lei Yang Jian Tian Archives Department China University of Petroleum(East China)Qingdao 266580China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Shenzhen HUASUAN Technology Co. Ltd.Shenzhen 518055China

TiO_(2)photocatalysts have been widely studied and applied for removing bacteria,but its antibacterial efficiency is limited to the ultraviolet(UV)range of the solar *** this work,we use the gold(Au)nanorods to enhance the visible and near-infrared(NIR)light absorption of TiO_(2)NBs,a typical UV light photocatalyst,thus the enhancement of its full solar spectrum(UV,visible and NIR)photocatalytic antibacterial properties is *** surface plasmon resonance(SPR)enhancement photocatalytic antibacterial mechanism is *** one hand,transverse and longitudinal SPR of Au NRs is beneficial for visible and NIR light *** the other hand,Au NRs combined with TiO_(2)NBs to form the heterostructure,which can improve the photogenerated carrier separation and direct electron transfer increases the hot electron concentration while Au NRs as the electron channel can well restrain charge *** produces the high yield of radical oxygen species and exhibits a superior antibacterial ***,we design a sterilization file cabinet with Au NR/TiO_(2)NB heterostructures as the photocatalytic coating *** study reveals that Au NR/TiO_(2)NB heterostructure is a potential candidate for sterilization of bacteria and archives protection.

关键词： Au nanorods TiO_(2)nanobelts Photocatalytic antibacterial activity Surface plasmon resonance Sterilization file cabinet

The metallic 1T-WS_(2)as cocatalysts for promoting photocatalytic N_(2) fixation performance of Bi_(5)O_(7)Br nanosheets

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Chinese Chemical Letters 2021年第11期32卷 3501-3504页

作者： Pengyuan Qiu Jianwei Wang zhangqian liang Yanjun Xue Yanli Zhou Xiaoli Zhang Hongzhi Cui Guiqing Cheng Jian Tian School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Environmental and Material Engineering Yantai UniversityYantai 264005China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Recently,widespread attention has been devoted to the typical layered BiOCl or BiOBr because of the suitable nanostructure and band ***,owing to the fast carrier recombination,the photocatalytic performance of BiOX materials is not so *** 1T phase WS_(2)nanosheets(NSs)onto Bi_(5)O_(7)Br NSs can improve the photocatalytic N_(2)fixation *** these,the obtained 1T-WS_(2)@Bi_(5)O_(7)Br composites with optimum 5%1T-WS_(2)NSs display a significantly improved photocatalytic N_(2)fixation rate(8.43 mmol L^(−1)h^(−1)g^(−1)),2.51 times higher than pure Bi_(5)O_(7)Br(3.36 mmol L^(−1)h^(−1)g^(−1)).And the outstanding stability of 1T-WS_(2)@Bi_(5)O_(7)Br-5 composites is also ***,the photoexcited electrons from Bi_(5)O_(7)Br NSs are quickly transferred to conductive 1T phase WS_(2)as electron acceptors,which can promote the separation of *** addition,1T-WS_(2)NSs can provide abundant active sites on the basal and edge planes,which can promote the efficiency of photocatalytic N_(2)*** work offers a novel solution to improve the photocatalytic performance of Bi_(5)O_(7)Br NSs.

关键词： Photocatalytic N_(2)fixation Bi_(5)O_(7)Br IT phase WS_(2) Electron-hole pairs Photocatalytic performance

Noble metal-like behavior of plasmonic Bi particles deposited on reduced TiO2 microspheres for efficient full solar spectrum photocatalytic oxygen evolution

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Chinese Journal of Catalysis 2020年第2期41卷 333-340页

作者： Hang Zhao zhangqian liang Xiang Liu Pengyuan Qiu Hongzhi Cui Jian Tian School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590ShangdongChina

Herein, novel plasmonic Bi metal in situ deposited in reduced Ti O2 microspheres(Bi@R-Ti O2) are fabricated via a bimetallic MOF-derived synthesized strategy by adjusting the synthesizing temperature. Different characterization techniques, including XRD, SEM, TEM, XPS, DRS, PL, EIS, and photocurrent generation, are performed to investigate the structural and optical properties of the as-prepared samples. The results indicate that the Bi particles are generated inside and outside of reduced Ti O2 microspheres via the reduction of Ti4+ and Bi3+ by ethylene glycol. When the annealing temperature is controlled at 300 o C, the corresponding Bi@R-Ti O2-300 sample with an appropriate amount of Bi nanoparticles exhibits the highest full solar spectrum photocatalytic oxygen evolution activity(4728.709 μmol h–1 g–1), which is 5.9 and 9.5 times higher than that of pure Ti O2 and Bi-Ti bimetal organic frameworks(Bi-Ti-MOFs). Several reasons are suggested for the above results:(1) Bi metal behaves as an "electron acceptor" to accelerate the charge carrier transfer from Ti O2 to Bi;(2) The surface plasmon resonance effect of loaded metallic Bi particles can enhance the visible and NIR light absorption capacity;(3) The generation of Ti3+ further narrows the band gap of TiO2.

关键词： Bi nanoparticles Full solar spectrum O2 evolution Photocatalysis Porous microspheres

Synthesis of salicylic acid-modified graphite carbon nitride for enhancing photocatalytic nitrogen fixation

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Synthesis of salicylic acid-modified graphite carbon nitride...

Synthesis of porous few-layer carbon nitride with excellent photocatalytic nitrogen fixation

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Pengyuan Qiu zhangqian liang Xiang Liu Xiu Qian Hongzhi Cui Jian Tian School of Materials Science and Engineering Shandong University of Science and Technology

Finding an efficient and environment-friendly photocatalyst is significant for *** this research,a simple calcination with urea and salicylic acid(SA) is created for constructing a SA-modified graphite carbon nitride(g-C3N4-SA) *** to pure g-C3N4,g-C3N4-SApresents broadened light absorption,due to n→π* transition at nitrogen ***,SA modification can strongly affect chemical and physical properties of g-C3N4,including increasing Brunauer-Emmett-Teller(BET) specific area,forming porous structure,improving optical absorption and promoting carrier separation,thus achieving the improved photocatalytic activity of *** optimumg-C3N4-SA with the mass of SA 0.05 g(g-C3N4-SA-0.05) presents a high ammonia evolution rate of 7.92 mmol L-1 h-1 g-1,2.5 and 1.4 times than g-C3N4(3.2 mmol L-1 h-1 g-1) and g-C3N4 loaded with Pt(5.47 mmol L-1 h-1 g-1).Furthermore,the excellent photostability of g-C3N4-SA is also achieved.

关键词： photocatalyst SA mod-ification photocatalytic nitrogen fixation photocatalytic activity

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Synthesis of porous few-layer carbon nitride with excellent ...

Analysis and experimental study on resistance-increasing behavior of composite high efficiency autonomous inflow control device

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Yanjun Xue Xiangkun Kong Yichen Guo zhangqian liang Hongzhi Cui Jian Tian School of Materials Science and Engineering Shandong University of Science and Technology

The porous few-layer g-CN(PFL-g-CN) is prepared by a simple molecular self-assembly *** with pure g-CN,the as-prepared PFL-g-CN is ultrathin,the surface is rich in pores,and the photocatalytic nitrogen fixation activity is greatly increased to 8.20 mM h ***-layer and ultrathin nature of PFL-g-CN can provide a larger specific surface area,expose more active sites,and reduce the diffusion path of charges and protons from the inside to the *** addition,the porous structure can narrow the band gap,thereby increasing the light absorption range and enhancing the light absorption ***,the presence of nitrogen vacancies causes PFL-g-CN to move to a more negative conductive band *** importantly,the isotopic experiments using 15 N as nitrogen source confirm the ammonia production originating from N rather than the decomposition of ***,PFL-g-CN can greatly improve the efficiency of visible light photocatalytic nitrogen fixation.

关键词： Molecular self-assembly g-C3N4 porous structure nitrogen vacancies photocatalytic nitrogen fixation

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Petroleum Science 2024年第2期21卷 1290-1304页

作者： liang-liang Dong Yu-Lin Zhang School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500SichuanChina State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan ProvinceChengdu610500SichuanChina

Bottom water coning is the main reason to reduce the recovery of horizontal bottom water reservoir. By water coning, we mean the oil-water interface changes from a horizontal state to a mound-shaped cone and breaks through to the wellbore. Autonomous inflow control device(AICD) is an important instrument maintain normal production after bottom water coning, however, the resistance increasing ability of the swirl type AICD is insufficient at present, which seriously affects the water control effect. Aiming this problem, this paper designs a multi-stage resistance-increasing and composite type AICD. The separation mechanism of oil-water two phases in this structure, the resistance form of oil-water single phase and the resistance-increasing principle of water phase are analyzed. Establishing the dual-phase multi-stage separation and resistance-increasing model, and verified by measuring the throttling pressure drop and oil-water volume fraction of the AICD, it is found that the composite type AICD has the effect of ICD and AICD at the same time, which can balance the production rate of each well section at the initial stage of production, delay the occurrence of bottom water coning. In the middle and later stages of production, water-blocking can be effectively increased to achieve water control and stable *** structural sensitivity analysis, the influence law of various structural parameters on the water control performance of composite AICD was obtained. The simulation calculation results show that,compared with the existing swirl type AICD, composite AICD has higher sensitivity to moisture content,the water phase throttling pressure drop is increased by 4.5 times on average. The composite AICD is suitable for the entire stage of horizontal well production.

关键词： Water control Flow separation Flow resistance-increasing AICD device Simulation and experiment

Global existence and large-time behavior for primitive equations with the free boundary

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Science China Mathematics 2024年第10期67卷 2303-2330页

作者： Hai-liang Li Chuangchuang liang School of Mathematical Sciences Capital Normal UniversityBeijing 100048China Academy for Multidisciplinary Studies Capital Normal UniversityBeijing 100048China College of Mathematics and Statistics Chongqing UniversityChongqing 401331China

In the present paper, the primitive equations, which can be used to simulate the large-scale motion of the ocean and atmosphere, are considered in the three-dimensional domain bounded below by a fixed solid boundary and above by a free-moving boundary. The global existence and uniqueness of strong solutions are established, and the long-time convergence to the equilibrium state is shown to be either at an exponential rate for the horizontal periodic domain or at an algebraic rate for the horizontal whole space.

关键词： primitive equations the free boundary value problem global well-posedness large-time behavior

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