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Photocatalytic CO2 reduction highly enhanced by oxygen vacancies on Pt-nanoparticle-dispersed gallium oxide

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Nano Research 2016年第6期9卷 1689-1700页

作者： Yun-Xiang Pan Zheng-Qing Sun huai-ping cong Yu-Long Men Sen Xin Jie Song Shu-Hong Yu School of Chemistry and Chemical Engineering Hefei University of Technology Hefei 230009 China Division ofNanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei 230026 China Institute of Nano Biomedicine and Engineering Department of Instrument Science and Engineering School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Photocatalytic CO2 reduction on metal-oxide-based catalysts is promising for solving the energy and environmental crises faced by mankind. The oxygen vacancy （Vo） on metal oxides is expected to be a key factor affecting the efficiency of photocatalytic CO2 reduction on metal-oxide-based catalysts. Yet, to date, the question of how an Vo influences photocatalytic CO2 reduction is still unanswered. Herein, we report that, on Vo-rich gallium oxide coated with Pt nanoparticles （Vo-rich Pt/Ga203）, CO2 is photocatalytically reduced to CO, with a highly enhanced CO evolution rate （21.0umol.h-1） compared to those on Vo-poor Pt/Ga2O3 （3.9 gmol-h-1） and Pt/TiO2（P25）（6.7 gmol.h-1）. We demonstrate that the Vo leads to improved CO2 adsorption and separation of the photoinduced charges on Pt/Ga203, thus enhancing the photocatalytic activity of Pt/Ga203. Rational fabrication of an Vo is thereby an attractive strategy for developing efficient catalysts for photocatalytic CO2 reduction.

关键词： photocatalytic CO2reduction oxygen vacancy metal-oxide-based catalyst C02 adsorption

Effect of pouring time on microstructure and mechanical properties of centrifugal cast Ti-46Al alloy tubes

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China Foundry 2025年

作者： Gang Huang Qian Dang cong-cong Su Jing Zhao Chi Zhang Guo-huai Liu Zhao-dong Wang The State Key Laboratory of Rolling and Automation Northeastern University School of Materials Science and Engineering Shenyang University of Technology

The grain size of TiAl alloy castings prepared by traditional casting process is coarse, thus showing poor mechanical properties. In this study, a new type of high performance Ti-46Al alloy tube prepared by vacuum centrifugal casting technology was introduced. This research comprehensively examined the influence of pouring time on the microstructure and mechanical performance of the castings, employing both experimental approaches and ProCast simulation methodologies. The findings indicate that prolonging the pouring time facilitates a microstructural evolution from coarse columnar grains to refined equiaxed grains. Under the condition of pouring temperature of 1,600 °C, rotation speed of 800 r·min-1and pouring time of 6 s, the tensile strength of Ti-46Al alloy at room temperature reaches 650 MPa, and the tensile strength at 800 °C reaches 705 MPa, which is significantly higher than that of traditional as-cast Ti-Al alloy.

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The Nano Research Young Innovators Awards in bio-inspired nanomaterials

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Nano Research 2024年第2期17卷 417-425页

作者： Jun Chen Shuotao Wang Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nano Research Young Innovators(NR45)Awards are designed to acknowledge and celebrate the achievements of young researchers under 45 years of *** individuals have made significant contributions to the field of nanoscience and *** the inaugural NR45 Awards in 2018,the journal's editorial board has recognized over a hundred innovators specializing in nanobiotechnology,nano energy,two-dimensional materials,and *** focus of the 2023 NR45 Awards is on bioinspired nanomaterials,acknowledging thirty-three outstanding young innovators for their extraordinary contributions in developing these materials with applications spanning clean energy,human healthcare,monitoring,and disease treatments,as shown in *** extend our heartfelt congratulations to all the 33 NR45 Awardees in 2023!

关键词： journal materials contributions

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磁场诱导梯度水凝胶的制备及其致动性能研究

现代化工 2025年第1期45卷 170-177页

作者：张伟腾郑奥从怀萍合肥工业大学化学与化工学院安徽合肥230009

采用酸刻蚀和高温热分解法合成了2D超顺磁性Fe_(3)O_(4)-MXene纳米片,以Fe_(3)O_(4)-MXene纳米片和聚N-异丙基丙烯酰胺(PNIPAM)为原料开发了一种各向异性梯度水凝胶致动器。结果表明,Fe_(3)O_(4)-MXene纳米片在水凝胶前溶液中垂直向下移... 详细信息

采用酸刻蚀和高温热分解法合成了2D超顺磁性Fe_(3)O_(4)-MXene纳米片,以Fe_(3)O_(4)-MXene纳米片和聚N-异丙基丙烯酰胺(PNIPAM)为原料开发了一种各向异性梯度水凝胶致动器。结果表明,Fe_(3)O_(4)-MXene纳米片在水凝胶前溶液中垂直向下移动,产生增量含量梯度,交联固定后得到各向异性梯度的网络结构。水凝胶在厚度上形成不同尺寸的孔径,在远离磁体的一侧孔具有相对较大的尺寸,约有50μm,在靠近磁体附近尺寸逐渐减小到约5μm。Fe_(3)O_(4)-MXene纳米片赋予水凝胶优异光热效应,在近红外光的照射下能够实现多种可逆的形状变化和仿生软机器人的功能。

关键词： Fe_(3)O_(4)-MXene磁性纳米片 N-异丙基丙烯酰胺光聚合梯度水凝胶软机器人

Adaptive finite element-element-free Galerkin coupling method for bulk metal forming processes

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第3期10卷 353-360页

作者： Lei-chao LIU Xiang-huai DONG cong-xin LI National Die and Mould CAD Engineering Research Center Shanghai Jiao Tong University Shanghai 200030 China

An adaptive finite element-element-free Galerkin (FE-EFG) coupling method is proposed and developed for the numerical simulation of bulk metal forming processes. This approach is able to adaptively convert distorted FE elements to EFG domain in analysis. A new scheme to implement adaptive conversion and coupling is presented. The coupling method takes both advantages of finite element method (FEM) and meshless methods. It is capable of handling large deformations with no need of remeshing procedures, while it is computationally more efficient than those full meshless methods. The effectiveness of the proposed method is demonstrated with the numerical simulations of the bulk metal forming processes including forging and extrusion.

关键词： Meshless method Adaptive coupling method Bulk metal forming Numerical simulation

Unraveling molecular-level mechanisms of reactive facet of carbon nitride single crystals photocatalyzing overall water splitting

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Rare Metals 2020年第12期39卷 1353-1355页

作者： cong-Yong Wang Chen-huai Yang Zhi-Cheng Zhang Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Department of Chemistry National University of SingaporeSingapore 117543Singapore Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China

Despite the reactive facets play a vital role in designing highly efficient photocatalysts,it has long been a tremendous challenge to reveal the principle that reactive facets favor photocatalysis at the molecular ***... 详细信息

关键词： splitting catalysis designing

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硬碳负极材料储钠性能的影响因素分析

化学试剂 2025年第1期47卷 45-50页

作者：杨耀陈平施志聪广东工业大学材料与能源学院广东广州510000 深圳市电科电源股份有限公司广东深圳518000 衡阳电科电源有限公司湖南衡阳421000

以木质素磺酸钠和酚醛树脂为前驱体,采用喷雾干燥和油浴干燥两种方法制备硬碳前驱体,前驱体在预氧化、碳化及清洗步骤后得到硬碳材料。通过扫描电子显微镜、X射线衍射、氮气吸附/脱附测试和拉曼光谱等方法探究采用不同制备方法合成的硬... 详细信息

以木质素磺酸钠和酚醛树脂为前驱体,采用喷雾干燥和油浴干燥两种方法制备硬碳前驱体,前驱体在预氧化、碳化及清洗步骤后得到硬碳材料。通过扫描电子显微镜、X射线衍射、氮气吸附/脱附测试和拉曼光谱等方法探究采用不同制备方法合成的硬碳材料在结构形貌和物相上的差别,并通过电化学测试分析所制备的硬碳材料的电化学性能。结果表明,采用喷雾干燥法合成的硬碳前驱体制备的硬碳材料具有更稳定的球形结构和较小的比表面积。作为钠离子电池负极材料,这种硬碳材料在电池中展现出更高的首次库伦效率,并且具有更稳定的循环性能。

关键词：硬碳钠离子电池负极材料喷雾干燥油浴干燥

A review of cavitation in tip-leakage flow and its control

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Journal of Hydrodynamics 2021年第2期33卷 226-242页

作者： huai-yu Cheng Bin Ji Xin-ping Long Wen-xin huai Mohamed Farhat State Key Lab of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Hubei Key Laboratory of Waterjet Theory and New Technology Wuhan 430072China Laboratory for Hydraulic Machines Ecole Polytechnique Federale de Lausanne(EPFL)LausanneSwitzerland

The tip-leakage vortex(TLV)cavitation is a challenging issue for a variety of axial hydraulic turbines and pumps from both technical and scientific *** flow characteristics of the TLV cavitation were widely studied in the past decades,but the knowledge about the tip-leakage cavitating flow is still *** present paper reviews the progresses in the researches of the TLV cavitation,including the numerical methods for the TLV cavitation,the flow characteristics of the TLV,the influences of the TLV cavitation on the local flow field and the control strategies of the TLV *** is indicated that the non-condensable gas may play an important role in the development of the TLV cavitation,and this fact should be considered during a careful simulation of the TLV *** is also suggested that the development of the TLV cavitation will significantly influence the distributions of the vorticity and the turbulence kinetic *** to the complexity of the TLV cavitation,it is still an open question how to suppress the TLV cavitation in a simple but effective ***,based on these understandings,some advanced topics for the future work are suggested to further promote the study of the TLV cavitation,for a deeper knowledge about the TLV cavitation.

关键词： Cavitation tip-leakage vortex(TLV) cavitation model flow control nuclei

New Results on Common Properties of Bounded Linear Operators RS and SR

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Acta Mathematica Sinica,English Series 2013年第10期29卷 1871-1884页

作者： Qing ping ZENG huai Jie ZHONG School of Mathematics and Computer Science Fujian Normal University

Let X, Y be Banach spaces, R ： X → Y emd S ： Y →X be bounded linear operators. When λ ≠ 0, we investigate common properties of λ i - SR and ,λ I - RS. This work should be viewed as a continuation of researches of Barnes and Lin et al.. We also apply these results obtained to B-Fredholm theory, extensions and Aluthge transforms.

关键词： Regularity spectrum extension aluthge transform