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铜铈复合氧化物催化降解甲基橙

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王书, 李攀. 铜铈复合氧化物催化降解甲基橙[J]. 环境工程学报, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
引用本文: 王书, 李攀. 铜铈复合氧化物催化降解甲基橙[J]. 环境工程学报, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
shu
WANG Shu, LI Pan. Catalytic degradation of methyl orange with Cu-Ce composite oxides[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
Citation: WANG Shu, LI Pan. Catalytic degradation of methyl orange with Cu-Ce composite oxides[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
shu

铜铈复合氧化物催化降解甲基橙

  • 1.

    同济大学环境科学与工程学院，上海 200092

  • 2.

    同济大学污染控制与资源化研究国家重点实验室，上海200092

  • 基金项目:

    国家水体污染控制与治理科技重大专项（2017ZX07201002）

Catalytic degradation of methyl orange with Cu-Ce composite oxides

  • 1.

    College of Environmental Science and Engineering, Tongji University, Shanghai 200092,China

  • 2.

    State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092,China

  • Fund Project:

摘要

  • 摘要: 采用水热法制备的铜铈复合氧化物能够直接催化降解甲基橙，探究了铜铈摩尔比、pH、投加量对催化降解效果的影响。研究发现，pH=3.5、Cu/Ce=1、投加量1.0 g·L-1时，甲基橙的降解效果最佳。在0.5~1.0 g·L-1之间时，随着投加量的增加，甲基橙的脱色速率加快，脱色率也有所增加。随着溶液中的pH逐渐下降，甲基橙脱色率有所增加，pH=3.5时，甲基橙脱色率最高；而进一步降低pH至3.0时，脱色率反而下降，可能是强酸腐蚀了金属氧化物表层，降低了甲基橙的降解效果。甲基橙主要因其被降解而脱色，促使甲基橙脱色的活性物质为·OH，且与体系中的分子氧有关，反应过程消耗一定的H+。
    Abstract: Hydrothermal method was used to prepare the copper-cerium composite oxide which could directly catalyze the degradation of methyl orange. The effects of the mole ratio of Cu and Ce, pH, and addition amount on the catalytic degradation were investigated. The results showed that the best degradation effects for methyl orange occurred at pH=3.5, Cu/Ce=1, and 1g·L-1 addition of the copper-cerium composite oxide. As the catalyst addition increased from 0.5 to 1.0 g·L-1, the decolorization rate of methyl orange was accelerated, and the decolorization efficiency also increased. When the solution pH declined, decolorization efficiency of methyl orange gradually increased, and reached the highest efficiency at pH=3.5, and then decreased as the pH decreased to 3.0 which could be attributed to the corrosion on the surface of metal oxide. The methyl orange decolorization was mainly ascribe to its degradation by·OH radicals, the major active species in the system, and molecular oxygen also played a certain role. In addition, some protons were consumed during the above degradation process.
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  • 刊出日期:  2018-11-12
王书, 李攀. 铜铈复合氧化物催化降解甲基橙[J]. 环境工程学报, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
引用本文: 王书, 李攀. 铜铈复合氧化物催化降解甲基橙[J]. 环境工程学报, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
shu
WANG Shu, LI Pan. Catalytic degradation of methyl orange with Cu-Ce composite oxides[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
Citation: WANG Shu, LI Pan. Catalytic degradation of methyl orange with Cu-Ce composite oxides[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3062-3068. doi: 10.12030/j.cjee.201805120
shu

铜铈复合氧化物催化降解甲基橙

  • 1. 同济大学环境科学与工程学院，上海 200092
  • 2. 同济大学污染控制与资源化研究国家重点实验室，上海200092
基金项目:

国家水体污染控制与治理科技重大专项（2017ZX07201002）

摘要: 采用水热法制备的铜铈复合氧化物能够直接催化降解甲基橙，探究了铜铈摩尔比、pH、投加量对催化降解效果的影响。研究发现，pH=3.5、Cu/Ce=1、投加量1.0 g·L-1时，甲基橙的降解效果最佳。在0.5~1.0 g·L-1之间时，随着投加量的增加，甲基橙的脱色速率加快，脱色率也有所增加。随着溶液中的pH逐渐下降，甲基橙脱色率有所增加，pH=3.5时，甲基橙脱色率最高；而进一步降低pH至3.0时，脱色率反而下降，可能是强酸腐蚀了金属氧化物表层，降低了甲基橙的降解效果。甲基橙主要因其被降解而脱色，促使甲基橙脱色的活性物质为·OH，且与体系中的分子氧有关，反应过程消耗一定的H+。

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