Rice Husk Templated Mesoporous ZnO Nanostructures for Ethanol Sensing at Room Temperature

作     者：M. Chitra K. Uthayarani N. Raj asekaran N. Neelakandeswari E. K. Girija D. Pathinettam Padiyan 

作者机构：Department of Physics Sri Ramakrishna Engineering College Coimbatore 641022 India Department of Chemistry Sri Ramakrishna Engineering College Coimbatore 641022 India Department of Physics Periyar University Salem 636011 India Department of Physics Manonmaniam Sundaranar University Abhishekapatti Tirunelveli 627012 lndia 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2015年第32卷第7期

页      面：202-205页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080202[工学-机械电子工程] 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）] 0802[工学-机械工程] 0704[理学-天文学] 0702[理学-物理学] 

主　　题：ZnO Rice Husk Templated Mesoporous ZnO Nanostructures for Ethanol Sensing at Room Temperature 

摘      要：Mesoporous zinc oxide nanostructures are successfully synthesized via the sol-gel route by using a rice husk as the template for ethanol sensing at room temperature. The structure and morphology of the nanostructures are characterized by x-ray diffraction, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, and nitrogen adsorption-desorption analyses. The mechanism for the growth of zinc oxide nanostructures over the biotemplate is proposed. SEM and TEM observations also reveal the formation of spherical zinc oxide nanoparticles over the interwoven fibrous network. Multiple sized pores having pore diameter ranging from 10- 4Ohm is also evidenced from the pore size distribution plot. The larger surface area and porous nature of the material lead to high sensitivity （40.93% for 300 ppm of ethanol）, quick response （42s） and recovery （40 s） towards ethanol at 30014. The porous nature of the interwoven fibre-like network affords mass transportation of ethanol vapor, which results in faster surface accessibility, and hence it acts as a potential candidate for ethanol sensing at room temperature.