摘要
以亚甲基蓝为降解物,在模拟可见光照射下比较Ag_3PO_4和TiO_2的光催化性能,探究Ag_3PO_4在不同pH、波长、催化剂用量和亚甲基蓝浓度下的光催化活性,并利用TOC分析降解的矿化效果。利用X射线衍射仪(XRD)、激光拉曼光谱仪(RRS)、傅里叶变换红外光谱仪(FT-IR)分析磷酸银样品的晶相组成。结果表明,在同等条件下Ag_3PO_4光催化活性远高于TiO_2。而Ag_3PO_4在中碱性环境、光照波长不大于535 nm、催化剂用量较大、亚甲基蓝溶液浓度不大于50mg/L这些条件下能有效降解亚甲基蓝。
The photocatalytic properties of Ag3PO4 and TiO2 were compared under simulated visible light irradiation with methylene blue as a degradant.And the effects of Ag3PO4 on photocatalytic activity under different pH, wavelength, catalyst dosage and methylene blue concentration were investigated.TOC was used to characterize the degree of methylene blue mineralization and test whether methylene blue was actually degraded.The crystal phase composition of silver phosphate samples were analyzed by X-ray diffraction (XRD), laser Raman spectrometer (RRS) and FT-IR.The results showed that the photocatalytic activity of Ag3PO4 was much higher than that of TiO2 under the same conditions. Ag3PO4 can effectively degrade methylene blue under conditions of medium alkaline environment, light wavelength was not greater than 535 nm with large amount of catalyst, and concentration of methylene blue solution was not greater than 50 mg/ L.TOC showed that the mineralization rate of methylene blue increased to 21% at 30 min.Through XRD, RRS and FT-IR analysis, it was confirmed that the prepared sample was silver phosphate with less impurities and was relatively pure.
作者
谢婉丽
尚荣
崔文权
XIE Wan-li;SHANG Rong;CUI Wen-quan(North China University of Science and Technology,Hebei Tangshan 063210,China)
出处
《广州化工》
CAS
2019年第4期31-34,共4页
GuangZhou Chemical Industry
