| Bi_2MoO_6可见光催化去除4BS染料实验研究 |
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| 引用本文： | 陈亚,陈建林,姚三丽,周懿,许岳泰.Bi_2MoO_6可见光催化去除4BS染料实验研究[J].环境化学,2009,28(6). |
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| 作者姓名： | 陈亚 陈建林 姚三丽 周懿 许岳泰 |
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| 作者单位： | 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京,210093 |
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| 摘 要： | 以Bi(NO_3)_3·5H_2O和(NH_4)_6M_o7O_(24)·4H_20为原料,采用预超声-水热法合成可见光催化剂Bi_2MoO_6,考察了在可见光催化条件下,催化剂的用量、污染物初始浓度、溶液pH值等因素对偶氮染料直接耐酸大红4BS去除效果的影响.结果表明,4Bs溶液初始浓度为20mg·l~(-1)、原始pH值6.90条件下,催化剂的最佳投加量为2g·l~(-1),光照60min后,4BS去除率达到92.7%;在实验浓度20-100mg·l~(-1)的范围内,催化剂投加量为2.0g·l~(-1),光照210min后染料去除量最大可达到约50mg·l~(-1),溶液在弱酸或弱碱性条件下脱色较为稳定,在强酸或强碱性条件下脱色较快,效果明显;催化剂重复使用前后结构和成分稳定,但光催化活性有所下降.
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| 关 键 词： | 预超声-水热合成 光催化 |
4BS REMOVAL INDUCED BY Bi2_MoO_6 UNDER VISIBLE LIGHT IRRADIATION |
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| CHEN Ya,CHEN Jian-lin,YAO San-li,ZHOU Yi,XU Yue-tai.4BS REMOVAL INDUCED BY Bi2_MoO_6 UNDER VISIBLE LIGHT IRRADIATION[J].Environmental Chemistry,2009,28(6). |
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| Authors: | CHEN Ya CHEN Jian-lin YAO San-li ZHOU Yi XU Yue-tai |
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| Abstract: | Visible-light-driven Bi_2MoO_6 photocatalyst was prepared by hydrothermal process with previously ultrasonic treatment. The effects of photocatalytic activity of Bi_2MoO_6 catalyst were evaluated by the decoloration of aqueous 4BS dye at room temperature under visible light irradiation. When the concentration of the aqueous 4BS dye was 20mg·l~(-1) at the initial pH 6.90 , the best dosage of Bi_2MoO_6 catalyst was 2g·l~(-1), and the removal rate was 92.7% after 60min. The structure and composition of Bi_2MoO_6 catalyst was stable after use of five times, but photocatalytie activity declined. |
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| Keywords: | Bi_2MoO_6 4BS Bi_2MoO_6 hydrothermal synthesis with previously ultrasonic treatment photocatalysis 4BS |
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