AgCl/AgIO4 composites as an efficient photocatalyst for visible-light-driven degradation of rhodamine B

AgCl/AgIO4 composites as an efficient photocatalyst for visible-light-driven degradation of rhodamine B

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A novel AgCl/AgIO4 composite was fabricated via an in-suit synthetic method. The as-prepared samples have been characterised by using X-ray diffraction, transmission electron microscopy, scanning electron microscopy, UV–vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy. Rhodamine B dilute solution was used to discuss the photocatalytic activities of the as-prepared composites under the visible light irradiation. Experimental results showed that with increasing the contents of AgIO4 the photocatalytic activity of the as-prepared hybrids was first increased and then decreased. When the molar ratio of AgCl to AgIO4 was 1:5, in 30 min, the as-prepared composites with the bandgap of 1.21 eV exhibited the highest photocatalytic activity and possessed 96.3% of degradation efficiency. That was increased by 71.5 and 27.9% compared with AgCl and AgIO4, respectively. Moreover, AgCl was linked with AgIO4 via chemical bonds rather than physical contact at the interfaces of these two semiconductors. In addition, a possible photocatalytic degradation mechanism for the as-prepared hybrids was also presented.


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