碳/石墨相氮化碳复合材料制备及其去除亚甲基蓝性能

doi:10.19964/j.issn.1006-4990.2022-0283

Abstract

Abstract:

To improve the performance of graphite-phase carbon nitride（g-C₃N₄） for methylene blue removal，glucose was used as carbon source，ammonium acetate was added as structural director，carbon/graphite-phase carbon nitride composites were prepared by hydrothermal method.Moreover，fourier transform infrared spectroscopy（FT-IR），X-ray diffraction（XRD） and scanning electron microscopy（SEM） were used to characterize the structure，composition，morphological characteristics and photocatalytic performance of the obtained composites.In addition，methylene blue was taken as the target pollutant.The effects of different factors on removal rate were investigated by orthogonal experiment L₉（3⁴）.The results showed that when the conditions were as follows:the light time of 20 h，pH value of 7.00，dosage of carbon/graphite carbon nitride composite of 0.15 g，the mass ratio of carbon to g-C₃N₄ of 5∶10，the removal rate reached 95.46 %.After five cycles，it could still reach 88.17 %.Carbon doping g-C₃N₄improved the methylene blue removal performance of graphite phase carbon nitride，which would provide reference for future research on printing and dyeing wastewater.

Key words: hydrothermal method, g-C₃N₄, orthogonal experiment, photocatalysis, methylene blue

CLC Number:

CHEN Zhangxu, FU Minglian, ZHU Danchen, ZHENG Bingyun. Preparation of carbon/graphite carbon nitride composites and their methylene blue removal performance[J]. Inorganic Chemicals Industry, 2023, 55(3): 134-139.

Figures/Tables 9

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项目	正交实验方案				亚甲基蓝去除率/%
项目	A 光照时间/h	B 溶液体系pH	C 复合材料投加量/g	D m（C）∶ m（g-C₃N₄）	亚甲基蓝去除率/%
实验1	5	6.00	0.05	1∶10	57.43
实验2	5	7.00	0.10	3∶10	65.62
实验3	5	8.00	0.15	5∶10	72.61
实验4	10	6.00	0.10	5∶10	79.88
实验5	10	7.00	0.15	1∶10	87.65
实验6	10	8.00	0.05	3∶10	75.73
实验7	20	6.00	0.15	3∶10	93.75
实验8	20	7.00	0.05	5∶10	88.89
实验9	20	8.00	0.10	1∶10	91.26
验证*	20	7.00	0.15	5∶10	95.46
均值1	65.22	77.02	74.02	78.78
均值2	81.09	80.72	78.92	78.37
均值3	91.30	79.87	84.67	80.46
极差R	26.08	3.70	10.65	2.09
因素主次	ACBD
最佳方案	A₃B₂C₃D₃

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Preparation of carbon/graphite carbon nitride composites and their methylene blue removal performance

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