A facile construction of heterostructured ZnO/Co_(3)O_(4) mesoporous spheres and superior acetone sensing performance  

作　　者：Mengli Lei Xinran Zhou Yidong Zou Junhao Ma Fahad AAlharthi Abdulaziz Alghamdi Xuanyu Yang Yonghui Deng 

机构地区：[1]Department of Chemistry,State Key Laboratory of Molecular Engineering of Polymers,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,iChEM,Fudan University,Shanghai 200433,China [2]Institute of Translational Medicine,Shanghai University,Shanghai 200444,China [3]Department of Chemistry,College of Science,King Saud University,P.O.Box 2455,Riyadh 11451,Saudi Arabia [4]State Key Lab of Transducer Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China

出　　处：《Chinese Chemical Letters》2021年第6期1998-2004,共7页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21673048,21875044,52073064,22005058 and 22005057);National Key R&D Program of China(No.2018YFA0209401);Key Basic Research Program of Science and Technology Commission of Shanghai Municipality(No.20JC1415300);Program of Shanghai Academic Research Leader(No.19XD1420300);the state key laboratory of Transducer Technology of China(No.SKT1904);supporting project number(No.RSP-2020/155)。

摘　　要：The rapid development of internet and internet of things brings new opportunities for the expansion of intelligent sensors,and acetone as a major disease detection indicator(i.e.,diabetes)making it become extremely important clinical indicator.Herein,uniform mesoporous ZnO spheres were successfully synthesized via novel formaldehyde-assisted metal-ligand crosslinking strategy.In order to adjust the pore structure of mesoporous ZnO,various mesoporous ZnO spheres were synthesized by changing weight percentage of Zn(NO_(3))_(2)·6 H_(2)O to tannic acid(TA).Moreover,highly active heterojunction mesoporous ZnO/Co_(3)O_(4)has been fabricated based on as-prepared ultra-small Co_(3)O_(4)nanocrystals(ca.3 nm)and mesoporous ZnO spheres by flexible impregnation technique.Profit from nano-size effect and synergistic effect of p-n heterojunction,mesoporous ZnO/Co_(3)O_(4)exhibited excellent acetone sensing performance with high selectivity,superior sensitivity and responsiveness.Typically,5 wt%Co_(3)O_(4)embedded mesoporous ZnO sphere showed prominent acetone response(ca.46 for 50 ppm),which was about 11.5 times higher than that in pure ZnO sensing device,and it was also endowed high cyclic stability.The nanocrystals embedded hybrid material is expected to be used as promising efficient material in the field of catalysis and gas sensing.

关 键 词：Mesoporous materials P-N heterojunction Nanocrystal Nano-size effect Gas sensing 

分 类 号：TB383.4[一般工业技术—材料科学与工程] R318.08[医药卫生—生物医学工程]