金属-二氧化钛相互作用对sba -15负载型金属-二氧化钛光催化剂光降解的影响

IF 1 4区工程技术 Q4 CHEMISTRY, APPLIED

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2023-01-01 DOI:10.2298/ciceq221017001g

S. Göl, Elif Akbay

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引用次数: 0

摘要

采用两步合成方法将几种过渡金属(Fe, Cu, Ni, Cr和Co)插入Ti-SBA-15中。采用XRD、SEM-EDX、N2吸附-解吸等温线、XRF和UV-DRS分析进行表征。结果证实，与Ti-SBA-15相比，该材料保留了有序的介孔结构和分散良好的金属钛，并增强了光吸收。考察了紫外光对亚甲基蓝降解的光催化性能。结果表明，在所制备的光催化剂中，Co-Ti-SBA-15对亚甲基蓝的降解具有最高的光催化活性。SBA-15的介孔结构增加了对反应物的吸附，TiO2在SBA-15的孔隙中分布良好，金属掺杂提高了电子转移迁移率，这可能是SBA-15活性显著提高的原因。除了效率外，Co-Ti-SBA-15是一种适合染料降解的催化剂，在五次光催化运行中，亚甲基蓝降解表现出良好的稳定性，没有任何结构偏差。

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The effect of metal-titania interaction on photodegradation in SBA-15-supported metal-titania photocatalysts

Several transition metals (Fe, Cu, Ni, Cr, and Co) were inserted into the Ti-SBA-15 using two-step synthesis methods. XRD, SEM-EDX, N2 adsorption-desorption isotherms, XRF, and UV-DRS analysis were used for characterizations. The results confirm the preservation of an ordered mesoporous structure and well-dispersed Ti-metal, and enhanced the absorption of light compared with Ti-SBA-15. The photocatalytic performances were evaluated in the degradation of methylene blue under UV light. The results show that the Co-Ti-SBA-15 exhibited the highest photocatalytic activity among the prepared photocatalysts for the degradation of methylene blue. The significant activity increase might be attributed to the increased reactant adsorption by the mesoporous structure of SBA-15, the good distribution of TiO2 in the pores of SBA-15, and the increased electron transfer mobility due to metal doping. In addition to efficiency, Co-Ti-SBA-15 is a suitable catalyst for dye degradation, exhibiting good stability in methylene blue degradation over five photocatalytic runs without any deviation of the structure.

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来源期刊

Chemical Industry & Chemical Engineering Quarterly CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

3.3 months

期刊介绍： The Journal invites contributions to the following two main areas: • Applied Chemistry dealing with the application of basic chemical sciences to industry • Chemical Engineering dealing with the chemical and biochemical conversion of raw materials into different products as well as the design and operation of plants and equipment. The Journal welcomes contributions focused on: Chemical and Biochemical Engineering [...] Process Systems Engineering[...] Environmental Chemical and Process Engineering[...] Materials Synthesis and Processing[...] Food and Bioproducts Processing[...] Process Technology[...]