双金属银铜氧化物溴化刻蚀制备多孔纳米CuO及其硫化氢气体传感性能研究  

Porous CuO from Ag_(2)Cu_(2)O_(x)(x=3 or 4)Etched by CTAB for H_(2)S Gas Sensing

作　　者：张蒙[1] 秦庸博 张富豪 奉雨静 Seda Nur Ozer 孙文龙[1] 赵永明 许章炼 Zhang Meng;Qin Yongbo;Zhang Fuhao;Feng Yujing;Seda Nur Ozer;Sun Wenlong;Zhao Yongming;Xu Zhanglian(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an,710049)

机构地区：[1]西安交通大学能源与动力工程研究院,西安710049

出　　处：《化学通报》2024年第6期701-709,641,共10页Chemistry

基　　金：国家自然科学基金项目(21906128);西安交通大学青年拔尖人才基金项目(7121181102)资助。

摘　　要：基于十六烷基三甲基溴化铵(CTAB)对双金属银铜氧化物Ag2Cu2Ox的刻蚀及硫代硫酸钠溶解副产物AgBr的方法制备了两种多孔纳米CuO骨架结构,并且利用X射线衍射仪、X射线光电子能谱仪和洛伦兹透射电镜进一步研究了刻蚀机理,结果表明CuO有独特的形貌结构和更大的比表面积。利用所制备的氧化铜具有大孔隙和多位点的优势,开展了H_(2)S气体传感实验。实验结果显示,在150℃的较低温度下纳米CuO传感器对0.0005‰H_(2)S仍具有1.7(CuO-Ag_(2)Cu_(2)O_(3))和1.3(CuO-Ag_(2)Cu_(2)O_(4))的灵敏度值,响应和恢复时间短,具有良好的选择性和长期稳定性;未来还可以通过构建异质结或者贵金属修饰多孔氧化铜来进一步提高传感性能。Two nanoporous CuO skeleton structures were prepared based on the etching of Ag2Cu2Ox by CTAB and the dissolution of AgBr by sodium thiosulphate,the etching mechanism was further investigated using XRD,XPS and TEM.Tests showed that the CuO had unique morphology and large specific surface areas.H2 S gas sensing experiments were carried out based on CuO with large pores and multiple sites.The sensors based on nano-CuO skeleton structures demonstrated the sensitivity of 1.7(CuO-Ag_(2)Cu_(2)O_(3))and 1.3(CuO-Ag_(2)Cu_(2)O_(4))for 0.0005‰H2 S at a low temperature of 150℃.The response and recovery time of the sensors were short and a long-term stability was observed for the sensors.In the future,the performance could be further improved by constructing heterojunction or modifying porous copper oxide with noble metals.

关 键 词：双金属银铜氧化物 CTAB 多孔氧化铜 H_(2)S传感 

分 类 号：TQ131.21[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]