二维少层碳化钛/氧化锌复合材料的制备及其气敏性能研究  

Fabrication of two-dimensional few-layer titanium carbide/zinc oxide composite and study on its gas sensitive property

作　　者：尹优优 刘晨辉 杨黎[2] 王访 李燕 许仙琼 高冀芸 YIN You-you;LIU Chen-hui;YANG Li;WANG Fang;LI Yan;XU Xian-qiong;GAO Ji-yun(School of Chemistry and Environment,Yunnan Minzu University,Kunming 650500,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南民族大学化学与环境学院,云南昆明650500 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《现代化工》2023年第7期113-119,共7页Modern Chemical Industry

基　　金：国家自然科学基金(51964046,51864028);云南省教育厅科学研究基金项目(2022J0441);云南省稀贵金属材料基因工程重大科技专项(202002AB080001);四川省科技项目(22QYCX0097)。

摘　　要：通过水热法和化学选择性刻蚀法分别制备一维氧化锌(ZnO)纳米线和二维层状碳化钛(Ti_(3)C_(2)T_(x)),采用静电自组装和双向冷冻干燥技术得到超轻少层碳化钛/氧化锌(f-Ti_(3)C_(2)T_(x)/ZnO)复合材料,并利用XRD、SEM、TEM等对样品进行结构和形貌表征。将f-Ti_(3)C_(2)T_(x)/ZnO复合材料制成气敏元件,考察其气敏性能,并与纯Ti_(3)C_(2)T_(x)进行比较。结果表明,200℃下,Ti_(3)C_(2)T_(x)质量分数为14%的复合材料对100μL/L二氧化氮(NO_(2))的响应值(S=R_(g)/R_(a))达到30.31,相比纯Ti_(3)C_(2)T_(x)提高7.27倍。f-Ti_(3)C_(2)T_(x)/ZnO复合材料可用作检测NO_(2)气体的新型传感材料。One-dimensional zinc oxide nanowire(ZnO)and two-dimensional layered titanium carbide(Ti_(3)C_(2)T_(x))are prepared by hydrothermal method and chemical etching method,respectively.Ultralight few-layer titanium carbide/zinc oxide composite(f-Ti_(3)C_(2)T_(x)/ZnO)is prepared via electrostatic self-assembly and bidirectional freeze-drying technologies.The structure and morphology of the samples are characterized by mean of XRD,SEM and TEM.The obtained f-Ti_(3)C_(2)T_(x)/ZnO composite is made into a gas sensor,and its gas-sensing properties are investigated and compared with pure Ti_(3)C_(2)T_(x).It is shown that the response value(S=R_(g)/R_(a))of the composite with a Ti_(3)C_(2)T_(x)mass fraction of 14%to a 100 ppm nitrogen dioxide reaches 30.31 at 200℃,which is 8.27 times that of pure Ti_(3)C_(2)T_(x).f-Ti_(3)C_(2)T_(x)/ZnO composite material can be used as a new sensing material for detecting NO2 gas.

关 键 词：碳化钛/氧化锌复合物 静电自组装 双向冷冻干燥 NO_(2)气敏传感器 

分 类 号：TB33[一般工业技术—材料科学与工程]