钇沉积的二氧化钛-SBA-15纳米催化剂制备及其应用

摘要/Abstract

摘要：

近年来,二氧化钛被广泛应用于污水处理领域。为合理改善二氧化钛在光催化应用中的缺陷,提高二氧化钛的使用范围,首先采用水热法制备了介孔型分子筛SBA-15,将二氧化钛沉积到介孔型分子筛上,再通过硝酸钇的浸渍将不同质量的钇沉积到分子筛上,制备出新型光催化剂钇-二氧化钛-SBA-15（Y-TiO₂-SBA-15）。采用X射线衍射仪（XRD）、透射电镜（TEM）、元素分析仪（EDS）、傅里叶红外光谱仪（FT-IR）和氮气吸附-脱附等对催化剂进行分析,并以甲基橙溶液为目标降解物考察了催化剂在不同条件下对甲基橙的的光降解能力。结果表明:在溶液pH=4且采用300 W氙灯照射140 min条件下,甲基橙脱色效果明显,降解率为93.1%。

关键词: SBA-15分子筛, 二氧化钛, 光催化性能

Abstract:

In recent years,TiO₂ has been widely used in wastewater treatment.In order to reasonably improve the defects of TiO₂ in photocatalytic applications and improve the use scope of TiO₂,this paper first used hydrothermal synthesis to prepare SBA-15 mesoporous molecular sieves and deposit TiO₂ on them.Then a new photocatalyst Y-TiO₂-SBA-15 was prepared by impregnating yttrium nitrate deposit different amounts of yttrium on the molecular sieves.The catalysts were characterized by XRD,TEM,EDS,FT-IR and N₂ adsorption-desorption.The photo degradation ability of methyl orange was investigated under different conditions with methyl orange solution as the target degradant.The results showed that when the pH was 4 and the solution was irradiated by xenon lamp for 140 min at 300 w,the decolorization effect of orange was obvious and the degradation rate was 93.1%.

Key words: SBA-15 Zeolite, titanium dioxide, photocatalytic properties

中图分类号:

TQ134.11

王硕,白丽明. 钇沉积的二氧化钛-SBA-15纳米催化剂制备及其应用[J]. 无机盐工业, 2019, 51(3): 77-81.

Wang Shuo,Bai Liming. Preparation and application of yttrium-deposited TiO₂-SBA-15 nano-catalyst[J]. Inorganic Chemicals Industry, 2019, 51(3): 77-81.

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样品	BET比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	BJH孔径/ nm
SBA-15	676.43	1.40	7.92
TiO₂-SBA-15	593.48	0.93	6.55
Y-TiO₂-SBA-15	552.67	0.84	5.96

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