A facile method for preparation of uniformly decorated-spherical SnO2 by CuO nanoparticles for highly responsive toluene detection at high temperature

作     者：Angga Hermawan Yusuke Asakura Miki Inada Shu Yin Angga Hermawan;Yusuke Asakura;Miki Inada;Shu Yin

作者机构：Institute of Multidisciplinary Research for Advanced Materials(IMRAM)Tohoku University2-1-1 KatahiraAoba-kuSendaiMiyagi980-857乙Japan Center of Advanced Instrumental AnalysisKyushu University6-1 Kasuga-Koen Kasuga-ShiFukuoka816-8580Japan 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第47卷第16期

页      面：119-129页

核心收录：

学科分类：07[理学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the Japan Society for the Promotion of Science(JSPS)Grant-in-Aid for the Scientific Research(KAKENHI)on Innovative Areas“Mixed Anion”(No.16H06439,No.16H06440) by the Dynamic Alliance for Open Innovations Bridging Human,Environment and Materials,the Cooperative Research Program of“Network Joint Research Center for Materials and Devices” 

主　　题：CuO SnO2 p-n heterojunction Toluene gas sensor 

摘      要：We reported a facile preparation of a uniform decoration of spherical n-type SnO2 by p-type CuO nanopa rticles as well as their utilization for enhanced performance on toluene gas *** nanoparticles and spherical SnO2 were synthesized by a facile non-hydrolytic solvothermal reaction,which could easily control their morphology.A uniform CuO nanoparticles decoration onto spherical SnO2 was achieved by a simple sonication and vigorous stirring at room tempe *** revealed orga nic solvents used in the oxide synthesis had a considerable influence on its surface charge that was beneficial for a uniformly electrostatic self-decoration between positively charged p-type CuO nanoparticles and negatively charged n-type spherical ***,CuO was partially reduced to Cu metal during high concentration of toluene exposure destroying p-n contact and developing new metal-semiconductor contact so-called ohmic junction,resulting in extraordinarily responsive and selective to toluene gas at 400℃as compared to a single p-CuO and *** was also found that the amount of particle decoration had an influence on sensor response and *** optimum amount of CuO nanoparticle decoration was0.1 mmol on 0.5 mmol *** re s ponse(S=Ra/Rg)and selectivity of CuO/S nO2 based material toward the exposure of 75 ppm toluene had reached to such high as 540 and 5,*** effect of p-n heterojunction and metal-semiconductor contact on the gas sensing mechanism of p-type CuO/n-type SnO2 was ***,by decorating with CuO nanoparticles,CuO/SnO2 morphology was well-maintained after gas sensing evaluation demonstrated its excellency for high temperature toluene gas sensor application.