引用本文:
卢远刚, 杨迎春, 刘盛余, 叶芝祥. 氮掺杂Bi2O3光催化剂可见光催化降解2,4-二氯酚[J]. 应用化学,
2012, 29(9): 1023-1029.
doi:
10.3724/SP.J.1095.2012.00479
Citation: LU Yuangang, YANG Yingchun, LIU Shengyu, YE Zhixiang. Photocatalytic Degradation of 2, 4-Dichlorophenol under Visible-light Irradiation Using Nitrogen-doped Bi2O3 Photocatalyst[J]. Chinese Journal of Applied Chemistry, 2012, 29(9): 1023-1029. doi: 10.3724/SP.J.1095.2012.00479
Citation: LU Yuangang, YANG Yingchun, LIU Shengyu, YE Zhixiang. Photocatalytic Degradation of 2, 4-Dichlorophenol under Visible-light Irradiation Using Nitrogen-doped Bi2O3 Photocatalyst[J]. Chinese Journal of Applied Chemistry, 2012, 29(9): 1023-1029. doi: 10.3724/SP.J.1095.2012.00479
氮掺杂Bi2O3光催化剂可见光催化降解2,4-二氯酚
摘要:
采用自制的Bi2O3及氮掺杂Bi2O3(N-Bi2O3)光催化剂,以卤钨灯为光源,在可见光下对2,4-二氯酚进行光催化降解。结果表明,N-Bi2O3较Bi2O3具有更高的可见光催化活性。当N-Bi2O3光催化剂投加量为2.0 g/L、2,4-二氯酚初始浓度为20 mg/L和pH=7时,光催化反应320 min,2,4-二氯酚的降解率最高可达到91.5%。2,4-二氯酚的光催化反应初活性与其浓度之间的关系符合Langmuir-Hinshelwood动力学速率模型。对降解过程中总有机碳及Cl-测试结果表明,N-Bi2O3光催化剂能较好地完成对2,4-二氯酚的深度矿化及脱氯。
English
Photocatalytic Degradation of 2, 4-Dichlorophenol under Visible-light Irradiation Using Nitrogen-doped Bi2O3 Photocatalyst
Abstract:
The photocatalytic degradation of 2,4-dichlorophenol was carried out using un-doped and nitrogen-doped bismuth oxide as catalysts under visible-light irradiation.The results indicated that the nitrogen-doped bismuth oxide exhibited a higher photocatalytic activity than that of the un-doped bismuth oxide.When 2.0 g/L of nitrogen-doped bismuth oxide was added to 20 mg/L of 2,4-dichlorophenol aqueous solution with initial pH=7,the degradation rate could reach 91.5%.Moreover,the relationship between 2,4-dichlorophenol degradation rate and its initial concentration follows the Langmuir-Hinshelwood model.The variations of total organic carbon and Cl- were also inspected during the photocatalytic reaction.It is suggested that it is beneficial for the mineralization and dechlorination for 2,4-dichlorophenol by using nitrogen-doped bismuth oxide as photocatalyst.
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Key words:
- nitrogen-doped bismuth oxide
- / photocatalysis
- / visible-light
- / dichlorophenol
- / kinetics
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