镧掺杂AlPO_4-5沸石的合成及湿敏性能研究  

Studies on the Synthesis of AlPO_4-5 Zeolite and Its Doping La and Their Application as Quartz Crystal Microbalance Humidity Sensor

作　　者：王炉煜 祝烨[2] 高利苹[2] 徐甲强[2] WANG Luyu ZHU Ye GAO Liping XU Jiaqiang(NEST Lab, College of Science, Shanghai University, Shanghai 200444, China Department of physics, College of Science, Shanghai University, Shanghai 200444, China.)

机构地区：[1]上海大学理学院化学系,上海200444 [2]上海大学理学院物理系,上海200444

出　　处：《郑州大学学报（工学版）》2016年第5期12-16,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(61371021;51301101)

摘　　要：以异丙醇铝、正磷酸、四甲基胍和硝酸镧为反应原料,通过一步水热法成功制备了AlPO_4-5沸石分子筛,并用稀土元素镧对其掺杂改性(LaAPO-5)以获得良好的气敏性能.通过扫描电镜可以看出,获得的La掺杂沸石分子筛为小球颗粒,并且堆积为酥松的棉絮状.将所合成的材料作为石英晶体微天平湿度传感器的敏感材料构建谐振式湿度传感器,与未掺杂La的AlPO_4-5相比,掺杂后的LaAPO-5在全湿度范围内的检测都具有较高的灵敏度,并且具有较好的线性关系和较短的响应/恢复时间,其中恢复时间可以快至3s.Undoped AlPO4-5 and La doped LaAPO-5 zeolites under different ratios were synthesized by onepot hydrothermal treatment of aluminum isopropoxide,phosphoric acid,1,1,3,3-Tetramethylguanidine,and La（ NO3）3·n H2O mixture followed by crystallization and calcination. The morphology of synthesized LaAPO-5 was small particles,and these small particles were stacked as cottonlike. The above materials were used as sensitive layer of quartz crystal micro balance（ QCM design） to build mass sensitive humidity sensor performance. Compared with undoped AlPO4-5 zeolite,the La APO-5 sensor possessed higher sensitivity,better linearity and more quickly response / recovery,and the recovery time can reach to 3s. The humidity sensor based on LaAPO-5 exhibitted excellent performance for humidity sensor.

关 键 词：ALPO4-5 掺杂镧 石英晶体微天平 湿度传感器 

分 类 号：TU528.1[建筑科学—建筑技术科学]