暴露不同晶面WO_(3)的简单合成及光催化性能  

Simple synthesis and photocatalytic performance of WO_(3) exposed different crystal facets

作　　者：李百裕[1] 朱蓓蓓[1] 陈玲霞[1] 王璐[1] 周杰[1] LI Bai-yu;ZHU Bei-bei;CHEN Ling-xia;WANG Lu;ZHOU Jie(College of Pharmaceutical and Environmental Engineering,Nantong Vocational University,Nantong 226007,China)

机构地区：[1]南通职业大学药品与环境工程学院,江苏苏南通226007

出　　处：《化学研究与应用》2024年第6期1318-1323,共6页Chemical Research and Application

基　　金：江苏省“333人才培养工程”;南通市科技局市级计划项目(MS22022033);江苏省“青蓝工程”资助项目。

摘　　要：以二水钨酸钠和水合偏钨酸铵为前驱体,在没有模板剂和助剂的条件下,采用简单水热法合成暴露不同晶面的WO_(3)纳米短棒。通过XRD、TEM、FT-IR和UV-visDRS等手段对合成样品的晶型、微观结构、表面官能团和光吸收性能进行表征;通过可见光下降解罗丹明B考察样品的光催化活性。结果表明:以二水钨酸钠为前驱体所合成的WO_(3)(WO_(3)-ST)沿[001]轴生长,主要暴露(100)和(010)晶面;以水合偏钨酸铵为前驱体所合成的WO_(3)(WO_(3)-AT)沿[110]轴生长,主要暴露(001)晶面,并且拥有比前者更宽的可见光吸收范围和更窄的禁带宽度;可见光下对罗丹明B的降解速率为为0.018min^(-1),为前者的18倍。WO_(3)nanorods with distinct crystal facets exposed were synthesized utilizing a simple hydrothermal approach without templates or additives using sodium tungstate dihydrate and ammonium metatungstate hydrate as precursors.XRD,TEM,FT-IR,and UV-vis DRS techniques were used to evaluate the crystal structure,microstructure,surface functional groups,and light absorption performance of the synthesized materials;the photocatalytic activity of the samples was studied by degrading rhodamine B under visible light.The results show that WO_(3)synthesized with sodium tungstate dihydrate as a precursor(WO_(3)-ST)grows along the[001]axis,primarily exposing the(100)and(010)crystal facets;WO_(3)synthesized with hydrated ammonium metatungstate as a precursor WO_(3)(WO-AT)grows along the[110]axis,primarily exposing the(001)crystal facet,and has a wider visible light absorption range and narower band gap than WO-ST.Under visible light,the degradation rate of rhodamine B over WO_(3)-AT is O.O18 min^(-1),which is 18 times that of WO_(3)-ST.

关 键 词：WO_(3) 水热法 晶面 光催化 

分 类 号：O643.36[理学—物理化学] O649.1[理学—化学]