PdO/CeO<sub>2</sub>类芬顿降解酸性橙7和水杨酸的催化性能

引用本文: 葛琳, 臧成杰, 陈锋. PdO/CeO₂类芬顿降解酸性橙7和水杨酸的催化性能[J]. 催化学报, 2015, 36(3): 314-321. doi: 10.1016/S1872-2067(14)60261-8 shu

Citation: Lin Ge, Chengjie Zang, Feng Chen. The enhanced Fenton-like catalytic performance of PdO/CeO₂ for the degradation of acid orange 7 and salicylic acid[J]. Chinese Journal of Catalysis, 2015, 36(3): 314-321. doi: 10.1016/S1872-2067(14)60261-8 shu

PdO/CeO₂类芬顿降解酸性橙7和水杨酸的催化性能

基金项目:
国家自然科学基金(21177039) (21177039)

上海市教委科研创新项目(13ZZ042). (13ZZ042)

摘要: 采用沉淀-沉积法制备了PdO/CeO₂催化剂, 并使用X射线衍射、高分辨透射电镜、N₂吸附-脱附等温线、X射线光电子能谱和Raman光谱对催化剂进行了表征. 表征结果显示, Pd在复合物中以Pd²⁺形式存在; PdO和CeO₂间的相互作用提高了CeO₂中的Ce³⁺含量. 通过酸性橙7和水杨酸的类芬顿降解考察了PdO/CeO₂的多相类芬顿和可见光芬顿催化活性. 结果表明, PdO沉积显著地促进了水杨酸的类芬顿降解, 催化剂的PdO含量为1.0 at%时其活性最佳. 染料酸性橙7在可见光照射条件下会引发染料光敏化效应. 吸附的染料分子在光激发后通过界面电子注入促进了Ce³⁺自表面过氧物种的再生. 由此, PdO负载和可见光照射的共同作用下, 1.0 PdO/CeO₂催化剂的酸性橙7类芬顿降解速率常数为3.90 h^-1, 为纯CeO₂活性的50倍左右.

关键词:

English

The enhanced Fenton-like catalytic performance of PdO/CeO₂ for the degradation of acid orange 7 and salicylic acid

1.
Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China
Received Date: 21 October 2014
Available Online: 20 March 2015
Fund Project:
国家自然科学基金(21177039)

上海市教委科研创新项目(13ZZ042).

Abstract: A PdO/CeO₂ catalyst was prepared by deposition-precipitation method and characterized with X-ray diffraction, high-resolution transmission electron microscopy, N₂ adsorption-desorption, X-ray photoelectron spectroscopy and Raman spectroscopy. The results show that the Pd is presented as Pd²⁺ in the catalyst. The interaction between the deposited PdO and CeO₂ increases the Ce³⁺ content. The catalytic activity of PdO/CeO₂ was tested in the heterogeneous Fenton-like degradation of acid orange 7 (AO7) and salicylic acid (SA), both in the dark and under visible irradiation. Deposition of PdO accelerates the Fen-ton-like degradation of SA, which reaches a maximum at 1.0 atom% PdO loading. A dye sensitization effect was seen with AO7 under visible irradiation. Dye sensitization promotes the regeneration of Ce³⁺ by interfacial peroxides species through interfacial electron injection. Consequently, the combined effects of PdO loading and visible light irradiating enhanced the Fenton-like activity to a reaction rate constant of 3.90 h^-1 for the 1.0 PdO/CeO₂, a ca. 50-fold improvement.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

PdO/CeO₂类芬顿降解酸性橙7和水杨酸的催化性能

English

The enhanced Fenton-like catalytic performance of PdO/CeO₂ for the degradation of acid orange 7 and salicylic acid

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

PdO/CeO2类芬顿降解酸性橙7和水杨酸的催化性能

English

The enhanced Fenton-like catalytic performance of PdO/CeO2 for the degradation of acid orange 7 and salicylic acid

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

PdO/CeO₂类芬顿降解酸性橙7和水杨酸的催化性能

The enhanced Fenton-like catalytic performance of PdO/CeO₂ for the degradation of acid orange 7 and salicylic acid

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs