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Oxygen vacancy self-doped single crystal-like TiO_(2) nanotube arrays for efficient light-driven methane non-oxidative coupling

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先进陶瓷(英文) 2023年第8期12卷 1577-1592页

作者： Jinbo Xue Jinyu Li Zhe Sun Huimin Li Huan Chang Xuguang Liu Husheng Jia Qi Li Qianqian Shen Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu 610031China

Photocatalytic non-oxidative coupling of methane(PNOCM)is a mild and cost-effective method for the production of multicarbon compounds.However,the separation of photogenerated charges and activation of methane(CH4)are the main challenges for this reaction.Here,single crystal-like TiO_(2) nanotubes(VO-p-TNTs)with oxygen vacancies(VO)and preferential orientation were prepared and applied to PNOCM.The results demonstrate that the significantly enhanced photocatalytic performance is mainly related to the strong synergistic effect between preferential orientation and VO.The preferential orientation of VO-p-TNT along the[001]direction reduces the formation of complex centers at grain boundaries as the form of interfacial states and potential barriers,which improves the separation and transport of photogenerated carriers.Meanwhile,VO provides abundant coordination unsaturated sites for CH4 chemisorption and also acts as electron traps to hinder the recombination of electrons and holes,establishing an effective electron transfer channel between the adsorbed CH4 molecule and photocatalyst,thus weakening the C–H bond.In addition,the introduction of VO broadens the light absorption range.As a result,VO-p-TNT exhibits excellent PNOCM performance and provides new insights into catalyst design for CH4 conversion.

关键词： TiO_(2)nanotubes(TNTs) oxygen vacancies(VO) preferential orientation photocatalytic non-oxidative coupling of methane(PNOCM)

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Effect of chlorine doping on the structural, morphological, optical and electrical properties of spray deposited CdS thin films

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Progress in Natural Science:Materials International 2015年第5期25卷 392-398页

作者： T.Sivaraman V.Narasimman V.S.Nagarethinam A.R.Balu PG and Research Department of Physics A.V.V.M Sri Pushpam College

CdS and chlorine doped CdS(CdS:Cl) thin films with different Cl-doping levels(0,2,4,6 and 8 at%) have been deposited on glass substrates by a spray pyrolysis technique using a perfume atomizer.The effect of Cl doping on the structural,morphological,optical and electrical properties of the films was investigated.XRD patterns revealed that all the films exhibit hexagonal crystal structure with a preferential orientation along the(0 0 2) plane irrespective of the Cl doping level.The particle size value decreases from 22.03 nm to 18.12 nm with increase in Cl concentration.Optical band gap is blue-shifted from 2.48 eV to 2.73 eV with increase in Cl doping concentration.All the films have resistivity in the order of 10～4 Ω cm.The obtained results confirm that chlorine as an anionic dopant material can enhance the physical properties of CdS thin films to a large extent.

关键词： X-ray diffraction Crystal structure preferential orientation Thin films Optical band gap

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A Study of AlN Films Prepared by Arc Ion Plating

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Journal of Materials Science & Technology 2003年第1期19卷 27-29页

作者： Meidong HUANG, Chunyan LU, Bing WANG, Chao SUN, Rongfang HUANG and Lishi WENInstitute of Metal Research, Chinese Academy of Science, Shenyang 110016, ChinaGuoqiang LIN and Chuang DONGState Key Laboratory for Materials Modification by Laser, Ion, and Electron Beams, Dalian University of Technology, Dalian 116024, China Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China Lab. for Mat. Modification by Laser Ion. and Electron. Beams Dalian Univ. of Technol. Dalian 116024 China

Hexagonal AIN films have been obtained by arc ion plating at different negative biases. X-ray diffraction and scanningelectron microscopy results show that AIN films with smooth surfaces and (002) preferred orientation are obtainedat low biases, whereas those with coarse surfaces and (100) preferred orientation are obtained at high biases. Theformation mechanism of AIN is analyzed and the experiment results are discussed. The effect of bias on adhesionstrength has also been examined.

关键词： A1N AIP preferential orientation Bias

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Structural and Magnetic Properties of Electrodeposited Ni_(70)Fe_(30) Nanowire Array

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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 472-474页

作者： XU Jinxia WANG Keyu Department of Materials Science and Engineering Hohai university Nanjing 210098 China Analysis ＆ Test Center Nanjing Normal University Nanjing 210097 China

Ordered Ni70Fe30 nanowire array was fabricated in a porous alumina template by alternating current electrodeposition. The structural and magnetic properties of the as-obtained nanowire array were investigated by SEM, TEM, XRD, EDS and VSM. The results indicate that the as-obtained Ni70Fe30 nanowires exhibit a diameter of about 69.9 nm and aspect ratio of more than 60. Meanwhile, a preferred orientation [110] of bcc lattice was observed. The as-obtained nanowire array has an obvious magnetic anisotropy, of which the easy direction is perpendicular to the surface of the array. Moreover, after annealed, the Ni70Fe30 nanowire array exhibits an enhanced magnetic anisotropy.

关键词： Ni70Fe30 nanowire array preferential orientation magnetic anisotropy

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