摘要
以葡萄糖(C6H12O6),分析纯硝酸铋(Bi(NO3)3·5H2O)和钨酸钠(Na2WO4·2H2O)为原料,在简单的微波水热-煅烧条件下成功制备了形貌可控的交叉薄片状C/Bi2WO6微晶。研究了反应体系中前驱物的不同摩尔比对产物的结构形貌以及光催化性能的影响。采用X-射线衍射仪(XRD)、EDS能谱分析、扫描电子显微镜(SEM),Perkin Elmer Lambda 950型紫外可见漫反射光谱仪和康塔公司NOVA 2200e型表面空隙度分析仪分别对产物的结构、形貌,光学性能以及氮吸附-脱附等温线进行表征。结果表明:当前驱物葡萄糖,硝酸铋和钨酸钠的摩尔比为1∶10∶5时,合成了形貌可控且具有较好可见光催化性能的C/Bi2WO6微晶,其禁带宽度为3.055 e V,在可见光照射240 min后对罗丹明B的降解效率可达到94.8%。
Using analytical Bi（NO3 ） 3 · 5H20, Na2WO4 · 2H20, and glucose as raw materials, crossed sheet morphology of C/BizWO6 crystallites were successfully prepared by a facile microwave hydrothermal-calcination method. The precursors in the different molar ratio in the reaction system on the structure of the morphology and the influence of photocatalytic performance were studied. The phase compositions, morphologies, optical properties and nitrogen adsorption-desorption isotherm of the as- prepared samples were characterized by X-ray diffraction, energy dispersive spectroscopy, scanning electron microscope, Perkin Elmer Lambda 950 ultraviolet-visible spectrophotometer. The results show that using raw materials of glucose, Bi （ NO3 ） 3, Na2WO4 with molar ratio of 1 ： 10 ： 5, controllable morphology and enhanced photocatalytic activity under visible-light of C/Bi2WO6 microcrystalline was synthesized, which band gap is 3. 055 eV. It exhibits good photocatalytic activities under visible light as the photocatalytic efficiency reaches 94.8% when subjected to light irradiation for 240 min.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第7期1820-1825,共6页
Journal of Synthetic Crystals
基金
国家科技支撑计划(2013BAF09B02)
国家自然科学基金(51472152)
陕西科技大学科研创新团队资助基金(TD12-05)
陕西省科研创新团队资助项目(2013KCT-06)
陕西科技大学研究生创新基金资助项目
