WO3/g-C3N4 modified by CeO2 and its oxidation and desulfurization properties

被引：0

作者：

Liu S. ^{[1
]}

Li X. ^{[2
]}

Wang S. ^{[1
]}

Li X. ^{[2
]}

Wang Y. ^{[1
]}

Yuan X. ^{[1
]}

Zhang J. ^{[1
]}

Feng R. ^{[1
]}

机构：

[1] College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, 113001, Liaoning

[2] Department of Chemical and Environmental Engineering, Yingkou Institute of Technology, Yingkou, 115014, Liaoning

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 04期

关键词：

Catalyst; CeO[!sub]2[!/sub; Distribution; Oxidation; Oxygen storage and release capacity; Oxygen vacancy;

D O I：

10.11949/0438-1157.20191332

中图分类号：

学科分类号：

摘要：

Using ammonium tungstate, cerium nitrate hexahydrate, and urea as raw materials, CeO2-WO3 / g-C3N4 catalyst was prepared by the melt method, and the samples were characterized by XRD, UV-Vis, TEM, PL, and XPS. XRD characterization results show that the introduction of CeO2 can improve the dispersion of active component WO3 on g-C3N4, and XPS characterization indicates the good oxygen storage and release capacity of Ce4+/Ce3+ is conducive to the formation of oxygen vacancy and reactive oxygen species. The PL characterization also indicates that the introduction of CeO2 can capture electrons and thus inhibits photogenic electron hole pair recombination. The introduction of the CeO2 for the catalytic activity of compound photocatalysis was investigated by oxidation and desulfurization experiment, the high-pressure sodium lamp was used to simulate visible light source, using the mixture of n-heptane and dibenzothiophene (DBT) as a simulation oil. Experimental results show that in 80℃, O/S molar ratio 5.0, 5% (mass fraction) CeO2 payload, 180 min of reaction conditions, the introduction of CeO2 catalyst on the oxidation of DBT in n-heptane conversion rate was 86.4%, higher than WO3/g-C3N4 on the oxidation of DBT conversion rate 72.9%. The characterization results and oxidation desulfurization experiments showed that the introduction of CeO2 could interact well with WO3/g-C3N4, thus improving the activity of the composite photocatalyst. © All Right Reserved.

引用

页码：1618 / 1626

页数：8

共 32 条

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