WS_(2)–CdSnO_(3)复合材料的制备及甲醛气敏性能  

Preparation and Formaldehyde Sensing Properties of WS_(2)-CdSnO_(3)Composite Materials

作　　者：刘醒醒 胡梦婷 刘翠翠 李佳豪 储向峰[1] 梁士明 LIU Xingxing;HU Mengting;LIU Cuicui;LI Jiahao;CHU Xiangfeng;LIANG Shiming(School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan 243002,Anhui;School of Materials Science and Engineering,Linyi University,Linyi 276005,Shandong,China)

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山243002 [2]临沂大学材料科学与工程学院,山东临沂276005

出　　处：《硅酸盐学报》2024年第12期3849-3855,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(62371003);山东省自然科学基金项目(ZR2020MF025)。

摘　　要：实现甲醛气体的高效检测对人类健康和环境污染十分重要。采用共沉淀–煅烧法制备了CdSnO_(3),并利用超声分散法制备了一系列不同质量比的WS_(2)–CdSnO_(3)复合材料。用X射线衍射、扫描电子显微镜和X射线能谱等对CdSnO_(3)和复合材料WS_(2)–CdSnO_(3)的相结构、形貌和元素价态进行了表征,研究了WS_(2)对CdSnO_(3)的气体传感性能的影响,结果表明:与适量的WS_(2)复合可以提高CdSnO_(3)的气敏性能。在工作温度140℃条件下,3.5%(质量分数)的WS_(2)–CdSnO_(3)复合材料对0.01%甲醛气体的响应为15.7,是CdSnO_(3)的4.2倍。Introduction Organic compound formaldehyde(HCHO)is a toxic volatile gas with an irritating odour,which is mainly derived from building materials,furniture and various adhesive coatings.Living in an environment containing formaldehyde gas for a long time can cause a series of hazards to human health,such as headaches,allergies,nausea,and even genetic mutations and leukaemia.It is thus necessary to design a gas sensor with a superior sensing performance to detect formaldehyde in real time.ABO_(3)type chalcogenide metal oxides have attracted much attention in sensor research,but their application is restricted due to the drawbacks such as poor sensitivity and high operating temperature.Many studies indicate that the modification of metal oxides with two-dimensional transition metal dihalides(2D TMDs)is one of the effective strategies to improve the gas sensing performance,and among the 2D TMDs materials,WS_(2)has aroused much interest in sensor research because of its high specific surface area,good thermal stability and excellent electron mobility.The gas sensor performance of metal oxides can be improved via the combination of WS_(2)to form a novel nanocomposite material.Hence,in this paper,a series of WS_(2)–CdSnO_(3)composites with different mass ratios were prepared by an ultrasonic mixing method.The microstructure,crystal structure,and valence state structure of WS_(2)–CdSnO_(3)composite material were characterized,and the gas sensing performance of the composite material was analyzed.Methods Cd Sn O_(3)was prepared with Cd(NO_(3))_2·4H_(2)O(AR,Shanghai Sarn Chemical Technology,China)and SnCl_(4)·5H_(2)O(AR)(Shanghai Aladdin Reagent Co.,China).CdSnO_(3)was ultrasonically compounded with WS_(2)(99.9%)to obtain WS_(2)–CdSnO_(3)composites.The physical phase composition,surface morphology,elemental composition,valence and pore size distribution and specific surface area of the composites were characterized by a model SmartLab SE X-ray diffractometer(XRD,Rigaku Co.,),scanning electron microscope(SEM,Tescan

关 键 词：二硫化钨 偏锡酸镉 甲醛 气敏性能 

分 类 号：O649[理学—物理化学] O614.27[理学—化学]