Ce-TiO2-RGO催化剂的制备及在印染废水处理中的应用研究

doi:10.3969/j.issn.2097-2806.2024.12.008

摘要/Abstract

摘要：

以溶胶-凝胶法和超声复合法制备了Ce-TiO₂-RGO复合光催化剂，研究了Ce掺杂质量分数对光催化剂降解纺织印染废水性能的影响。通过XRD、SEM、TEM、UV-vis、PL对复合光催化剂进行了表征。研究结果表明：Ce-TiO₂颗粒均匀吸附在GO表面，Ce-TiO₂的粒径约25~110 nm。Ce的掺杂后使TiO₂-RGO复合光催化剂的吸收带边发生了红移，禁带宽度减小。随着Ce掺杂质量分数的增大，Ce-TiO₂-RGO复合光催化剂的PL强度先降低后轻微增大，6% Ce-TiO₂-RGO复合光催化剂在410和470 nm的发射峰强度最低。以纺织印染废水为降解对象，在180 min时，6% Ce-TiO₂-RGO对COD的去除率达到最大值82.21%，降解后COD值为88.95 mg/L，符合废水排放标准。在180 min时，6% Ce-TiO₂-RGO对纺织印染废水的降解率达到了最大值99.21%。Ce-TiO₂-RGO复合光催化剂在染色纺织废水的处理方面表现出巨大的应用潜力。

关键词: 溶胶-凝胶法, 纺织印染废水, Ce-TiO₂-RGO, 光催化, 光谱性能

Abstract:

Ce-TiO₂-RGO composite photocatalyst was prepared by sol-gel method and ultrasonic treatment. The effect of Ce doping mass fraction on the degradation of textile printing and dyeing wastewater was studied. The catalysts were characterized by XRD, SEM, TEM, UV-vis and PL. The results showed that, Ce-TiO₂ particles uniformly adsorbed on the GO surface, and the particle diameter of Ce-TiO₂ was approximately 25-110 nm. After Ce doping, the absorption band edge of TiO₂-RGO composite photocatalyst was redshifted and the band gap was reduced. With the increase of Ce doping mass fraction, the PL intensity of Ce-TiO₂-RGO composite photocatalyst first decreased and then slightly increased, and the emission peak intensity of 6% Ce-TiO₂-RGO composite photocatalyst was the lowest at 410 nm and 470 nm. Taking textile printing and dyeing wastewater as the research object of degradation, the COD removal rate of 6% Ce-TiO₂-RGO reached the maximum of 82.21% at 180 min, and the COD value after degradation was 88.95 mg/L which was in line with the wastewater discharge standard. On the other hand, at 180 min, the degradation rate for textile printing and dyeing wastewater by 6% Ce-TiO₂-RGO also reached the maximum （99.21%）. Therefore, the Ce-TiO₂-RGO composite photocatalyst showed great application potential in the treatment of textile dyeing wastewater.

Key words: sol-gel method, textile printing and dyeing wastewater, Ce-TiO₂-RGO, photocatalysis, spectral performance

中图分类号:

X791

朱宝, 潘艳. Ce-TiO₂-RGO催化剂的制备及在印染废水处理中的应用研究[J]. 日用化学工业（中英文）, 2024, 54(12): 1465-1472.

Bao Zhu, Yan Pan. Preparation of Ce-TiO₂-RGO catalyst and its application in the treatment of printing and dyeing wastewater[J]. China Surfactant Detergent & Cosmetics, 2024, 54(12): 1465-1472.

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样品	ε/%	a/nm	b/nm	c/nm	V/nm³
TiO₂-RGO	0.715 8	0.378 5	0.378 5	0.949 8	0.136 07
2% Ce-TiO₂-RGO	0.763 2	0.379 2	0.379 2	0.951 5	0.136 82
4% Ce-TiO₂-RGO	0.791 8	0.379 4	0.379 4	0.954 2	0.137 35
6% Ce-TiO₂-RGO	0.803 5	0.379 5	0.379 5	0.955 3	0.137 58
8% Ce-TiO₂-RGO	0.811 2	0.379 8	0.379 8	0.956 2	0.137 93

Ce-TiO₂-RGO催化剂的制备及在印染废水处理中的应用研究

Preparation of Ce-TiO₂-RGO catalyst and its application in the treatment of printing and dyeing wastewater

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