Heterostructure Ag@WO3-x Composites with High Selectivity for Breaking Azo-bond

doi:10.1007/s40242-018-8095-0

Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (4): 517-522.doi: 10.1007/s40242-018-8095-0

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Heterostructure Ag@WO_3-x Composites with High Selectivity for Breaking Azo-bond

FANG Zhenxing, CHEN Yan, WANG Boran, JIAO Shihui, PANG Guangsheng

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Received:2018-03-22 Online:2018-08-01 Published:2018-06-04
Contact: JIAO Shihui E-mail:jiaosh@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21371066).

Abstract

Abstract: The heterostructure Ag@WO_3-x(x=0.1 or 1) composites with high selectivity for breaking azo-bond were obtained by in situ reduction of Ag₂WO₄. The crystal structure and morphology of Ag@WO_3-x were characterized by X-ray powder diffraction(XRD), scanning electron microscope(SEM) and transmission electron microscope(TEM). The residue solution of methyl orange(MO) after degradation was tested by gas chromatograph mass spectrometer (GCMS) to analyze the exact components. The results indicate that the products after degradation are N, N-dimethylaniline, N, N-dimethyl-p-phenylenediamine and sulfanilic acid. This is caused by specific breaking of azo-bond in MO. The azo-bond breaking of MO by Ag@WO_3-x could occur in dark without any light illumination. Therefore, we proposed a possible mechanism for this azo-bond breaking reaction based on the reaction condition and results.

Key words: Heterostructure, In situ reduction, Azo-bond

FANG Zhenxing, CHEN Yan, WANG Boran, JIAO Shihui, PANG Guangsheng. Heterostructure Ag@WO_3-x Composites with High Selectivity for Breaking Azo-bond[J]. Chemical Research in Chinese Universities, 2018, 34(4): 517-522.

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Heterostructure Ag@WO_3-x Composites with High Selectivity for Breaking Azo-bond

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