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以尿素、硫脲分别作为N、S源,氯化锡作为Sn源,利用水热法合成了N/S/Sn O_2-Ti O_2产品.同时,采用XRD、SEM、XPS等技术对不同煅烧温度处理后的产品进行了表征.最后,以质量浓度为0.02 g·L~(-1)的甲基橙水溶液为模拟污染物,采用UV-vis光谱及BET分析研究了产品的光催化活性效果.实验结果表明,当煅烧温度为550℃时,水热合成出的产品结晶度较高,粒径较小,约20 nm左右.S以+6价形式进入Ti O_2晶格形成Ti—O—S键,N通过取代晶格中的O形成O—Ti—N键,Sn以Sn O_2的形式分散在Ti O_2产品中.Sn Cl4的加入不仅与C16H36O4Ti竞争水源,缓解C16H36O4Ti的水解,而且对产品有一定的分散效果.光催化活性实验结果表明,当紫外灯照射时间达到1 h时,N/S/Sn O_2-Ti O_2降解甲基橙溶液基本完成,脱色率达到95%以上.
The products of N / S / Sn O 2 -Ti O 2 were synthesized by hydrothermal method using urea and thiourea as N, S sources and SnCl 3 as Sn sources respectively. Meanwhile, the effects of calcination temperature Finally, the aqueous methyl orange solution with a concentration of 0.02 g · L ~ (-1) was used as a simulated pollutant, and the photocatalytic activity of the product was studied by UV-vis spectroscopy and BET analysis. The experimental results show that when the calcination temperature is 550 ℃, the hydrothermally synthesized product has higher crystallinity and smaller particle size of about 20 nm, and the S enters the Ti O 2 lattice in the form of +6 valences to form Ti-O-S Bond, N forms O-Ti-N bond by substituting O in the crystal lattice and Sn is dispersed in Ti O 2 product as Sn O 2 .Sn Cl 4 can not only compete with C16H36O4Ti for water supply but also alleviate the hydrolysis of C16H36O4Ti, The results of photocatalytic activity show that when UV irradiation time reaches 1 h, the degradation of methyl orange solution by N / S / Sn O 2 -Ti O 2 is basically completed and the decolorization rate reaches more than 95%.