期刊
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
卷 18, 期 9, 页码 2619-2632出版社
SPRINGER
DOI: 10.1007/s13762-020-02976-7
关键词
Sonophotocatalysis; Water treatment; Doped zinc oxide nanostructures; Band gap engineering
The synthesis of metal- and non-metal-doped zinc oxide nanostructures via microwave-assisted thermal decomposition method showed promising photocatalytic activity in degrading methylene blue under visible light. The sodium-doped ZnO with nanorod morphology exhibited high crystallinity. The study suggests the potential application of this photocatalyst in water treatment processes due to its admirable degradation rate and photostability.
The use of photocatalysis in wastewater treatment using low cost photocatalyst plays a vital role in thwarting the enigma of water pollution. In this work, we report synthesis of metal- and non-metal-doped zinc oxide (ZnO) nanostructures via solid state, solvent and surfactant-free microwave-assisted thermal decomposition method. HRTEM images confirm the formation of highly crystalline nanorod morphology in the case of sodium-doped ZnO. The photocatalytic activity of the synthesized samples initially assessed by the degradation of methylene blue under visible light illumination suggests that SZO-3 (15wt% Na-doped) with admirable degradation rate (95% in 180 min with apparent rate constant of 1.69 x 10(-2) min(-1)) and tenacious photostability envisages its potential applications in water treatment processes. The coalescence of ultrasound, visible light and catalyst resulted in augmented degradation (99.5%) in 60 min.
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