摘要
以五水合硝酸铋和二水合钨酸钠为原料,以十六烷基三甲基溴化铵(CTAB)为溴源,制备Br掺杂Bi_(2)WO_(6),通过调节CTAB的含量,利用水热法制备了Br掺杂量不同的Bi_(2)WO_(6)催化剂。以抗生素环丙沙星、诺氟沙星作为污染物,测试Br掺杂Bi_(2)WO_(6)催化剂的光催化性能。结果表明,2%掺杂量(物质的量分数)的Bi_(2)WO_(6)相比于Bi_(2)WO_(6)的光催化降解性能最好。此外,通过X射线粉末衍射、红外光谱、扫描电镜、荧光光谱、X射线光电子能谱和拉曼光谱等一系列表征,对Br掺杂后催化剂的物相组成、微观形貌、光生电荷分离率和光学性质等进行分析。最后进行了自由基捕获实验并提出了可能的光催化机理。
Bismuth nitrate pentahydrate and sodium tungstate dihydrate were used as raw materials,and cetyltrimethylammonium bromide(CTAB)was used as bromine source to achieve Br-doped Bi_(2)WO_(6).By adjusting the content of CTAB,Bi_(2)WO_(6) catalysts with different Br doping amounts were prepared by hydrothermal method.The antibiotics ciprofloxacin and norfloxacin were used as pollutants to test the photocatalytic performance of the Br-doped Bi_(2)WO_(6) catalyst.The results showed that the 2%(molar fraction)doped Bi_(2)WO_(6) had the best photocatalytic degradation performance compared to pure Bi_(2)WO_(6).In addition,through a series of tests such as X-ray powder diffraction,Fourier transform infrared spectra,scanning electron microscope,photoluminescence spectra,UV-Vis diffuse reflection spectra,Raman,and X-ray photoelectron spectra,the phase composition,micro morphology,photo-generated charge separation rate,and optical properties of the Br-doped catalyst were analyzed.The free radical capture experiments were carried out and the possible photocatalytic mechanisms were proposed.
作者
周鑫
张志
陈飘
杨水金
杨赟
ZHOU Xin;ZHANG Zhi;CHEN Piao;YANG Shui‑Jin;YANG Yun(College of Chemistry and Chemical Engineering,Hubei Key Laboratory of Pollutant Analysis&Ruse Technology,Hubei Normal University,Huangshi,Hubei 435002,China;College of Chemistry and Environmental Engineering,Hanjiang Normal University,Shiyan,Hubei 442000,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2022年第9期1716-1728,共13页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21171053)
湖北省教育厅重点科研项目(No.D20213102)资助。
