Preparation and Photocatalytic Performance of Ruthenium Dioxide/Titanium Dioxide Composite Catalyst

doi:10.19894/j.issn.1000-0518.240090

Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (9): 1324-1332.DOI: 10.19894/j.issn.1000-0518.240090

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Preparation and Photocatalytic Performance of Ruthenium Dioxide/Titanium Dioxide Composite Catalyst

Zhen-jian JIA¹^,²(), Xi HAN³, Jie ZHANG³

^1.School of Energy Science and Engineering，Harbin Institute of Technology，Harbin 150001，China
^2.Institute of Advanced Energy and Power Technology，Zhengzhou Research Institute of Harbin Institute of Technology，Zhengzhou 450003，China
^3.College of Chemistry and Chemical Engineering，Guangxi University，Nanning 530004，China

Received:2024-03-22 Accepted:2024-07-16 Published:2024-09-01 Online:2024-10-09
Contact: Zhen-jian JIA
About author:jiazhenjian2023@163.com
Supported by:
the National Natural Science Foundation of China(52106137)

Abstract

Abstract:

The RuO₂/TiO₂ composite catalyst was prepared by wet immersion method combined with heat treatment process， and its structure was characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Analyze the photocatalytic effect of the composite catalyst under different conditions such as the amount of RuO₂ solution， light intensity， pH of methyl orange solution， and ventilation rate. The results showed that the doping of RuO₂ did not significantly change the crystal plane structure of TiO₂. As the mass fraction of RuO₂ increased， the sample particle size first increased and then decreased， reaching an ideal equilibrium point at a 0.15% addition amount. When the amount of RuO₂ solution is 0.15% mass fraction and the light intensity is 4.23 mW/cm²， the degradation rate of methyl orange reaches 65%， indicating a high photocatalytic effect. When the methyl orange solution is acidic， a more ideal photocatalytic effect can be achieved. When preparing the composite catalyst， the photocatalytic effect is better when the calcination temperature is 550 ℃. However， ventilation is not the key factor affecting the photocatalytic effect. It aims to provide valuable references for the preparation and application of RuO₂/TiO₂ composite catalysts.

Key words: Ruthenium dioxide, Titanium dioxide, Composite catalyst, Photocatalysis, Degradation rate, Methyl orange

CLC Number:

O649

Zhen-jian JIA, Xi HAN, Jie ZHANG. Preparation and Photocatalytic Performance of Ruthenium Dioxide/Titanium Dioxide Composite Catalyst[J]. Chinese Journal of Applied Chemistry, 2024, 41(9): 1324-1332.

Figures/Tables 9

References 19

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Reaction time/min	Degradation rate/%
Reaction time/min	Light intensity=0	Light intensity=2.04 mW/cm²	Light intensity=4.23 mW/cm²
5	0.54	0.94	1.28
10	1.28	2.75	3.45
15	2.64	4.97	5.78
20	5.12	7.44	9.67
25	7.07	10.06	12.74
30	10.59	13.95	15.69
35	18.75	26.46	29.74
40	20.31	37.06	41.97
45	23.67	52.66	58.44
55	25.04	60.15	69.15
60	27.69	65.43	89.46

Reaction time/min	Degradation rate/%
Reaction time/min	Light intensity=0	Light intensity=2.04 mW/cm²	Light intensity=4.23 mW/cm²
5	0.54	0.94	1.28
10	1.28	2.75	3.45
15	2.64	4.97	5.78
20	5.12	7.44	9.67
25	7.07	10.06	12.74
30	10.59	13.95	15.69
35	18.75	26.46	29.74
40	20.31	37.06	41.97
45	23.67	52.66	58.44
55	25.04	60.15	69.15
60	27.69	65.43	89.46

Reaction time/min	Degradation rate/%
Reaction time/min	pH=2	pH=7	pH=11
5	5.98	3.67	1.75
10	14.76	11.44	8.96
15	19.73	16.75	13.74
20	27.86	22.34	19.31
25	36.74	31.38	27.86
30	43.97	39.84	35.47
35	52.47	46.72	42.36
40	68.47	59.31	51.63
45	72.16	66.31	62.75
55	81.82	78.29	76.33
60	91.47	88.31	82.64

Reaction time/min	Degradation rate/%
Reaction time/min	pH=2	pH=7	pH=11
5	5.98	3.67	1.75
10	14.76	11.44	8.96
15	19.73	16.75	13.74
20	27.86	22.34	19.31
25	36.74	31.38	27.86
30	43.97	39.84	35.47
35	52.47	46.72	42.36
40	68.47	59.31	51.63
45	72.16	66.31	62.75
55	81.82	78.29	76.33
60	91.47	88.31	82.64

Reaction time /min	Degradation rate/%
Reaction time /min	350 ℃	550 ℃	750 ℃
5	20.48	25.49	9.21
10	35.76	46.37	21.37
15	44.97	52.76	24.15
20	49.38	59.34	30.72
25	52.91	64.79	33.81
30	59.73	70.31	35.19
35	64.92	74.82	38.96
40	68.33	81.54	40.13
45	70.15	87.61	41.55
55	72.34	92.47	46.71
60	86.39	96.73	50.17

Preparation and Photocatalytic Performance of Ruthenium Dioxide/Titanium Dioxide Composite Catalyst

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