使用 WO@MoS/Ag 中空纳米管光催化剂活化过一硫酸盐降解双酚 A。
Degradation of bisphenol a using peroxymonosulfate activated by WO@MoS/Ag hollow nanotubes photocatalyst.
机构信息
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China; University of Chinese Academy of Sciences, Beijing, 100039, China.
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China.
出版信息
Chemosphere. 2019 Jul;227:589-597. doi: 10.1016/j.chemosphere.2019.04.067. Epub 2019 Apr 16.
WO@MoS/Ag (HW@MA) hollow tubes were successfully engineered to photodegrade bisphenol A (BPA) combined with peroxymonosulfate (PMS) for the first time. XRD, XPS, TEM and SEM were conducted. The HW@MA tubes present excellent photocatalytic performance on the removal of BPA. The intermediate products of BPA were investigated by GC-MS analysis and the degradation pathway was proposed. To explore the transferred mechanism of photoproduced carriers, the electron paramagnetic resonance (EPR) technique was carried out. The results revealed that the superoxide radical (O), hydroxyl radical (OH), sulfate radical (SO) were the main active radicals. Moreover, the formed schottky junctions enhanced the separation efficiency of photoinduced electron-hole pairs. Besides, the effect of the photocatalysts' dosage, PMS concentration, pH of the initial solution and co-existing anions on the BPA degradation were investigated.
WO@MoS/Ag（HW@MA）空心管首次成功构建，可用于光降解双酚 A（BPA）与过一硫酸盐（PMS）的结合物。进行了 XRD、XPS、TEM 和 SEM 测试。HW@MA 管在去除 BPA 方面表现出优异的光催化性能。通过 GC-MS 分析研究了 BPA 的中间产物，并提出了降解途径。为了探究光生载流子的转移机制，采用电子顺磁共振（EPR）技术。结果表明，超氧自由基（O）、羟基自由基（OH）、硫酸根自由基（SO）是主要的活性自由基。此外，形成的肖特基结提高了光生电子-空穴对的分离效率。另外，还考察了催化剂用量、PMS 浓度、初始溶液 pH 值和共存阴离子对 BPA 降解的影响。
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