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氮掺杂石墨烯高效移除水中4-氯苯酚

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王小波, 唐鹏, 丁聪, 曹小艳, 袁颂东, 左小华, 邓祥义. 氮掺杂石墨烯高效移除水中4-氯苯酚[J]. 环境化学, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
引用本文: 王小波, 唐鹏, 丁聪, 曹小艳, 袁颂东, 左小华, 邓祥义. 氮掺杂石墨烯高效移除水中4-氯苯酚[J]. 环境化学, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
shu
WANG Xiaobo, TANG Peng, DING Cong, CAO Xiaoyan, YUAN Songdong, ZUO Xiaohua, DENG Xiangyi. Efficient removal of 4-chlorophenol in water by nitrogen doped reduced graphene oxide[J]. Environmental Chemistry, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
Citation: WANG Xiaobo, TANG Peng, DING Cong, CAO Xiaoyan, YUAN Songdong, ZUO Xiaohua, DENG Xiangyi. Efficient removal of 4-chlorophenol in water by nitrogen doped reduced graphene oxide[J]. Environmental Chemistry, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
shu

氮掺杂石墨烯高效移除水中4-氯苯酚

  • 1.

    湖北理工学院化学与化工学院, 黄石, 435003;

  • 2.

    湖北工业大学, 太阳能高效利用湖北省协同创新中心, 武汉, 430068

  • 基金项目:

    国家自然科学基金（51372077），湖北省教育厅青年项目（Q20164503）和湖北理工学院引进人才项目（16xjz06R，17xjz01C）资助.

Efficient removal of 4-chlorophenol in water by nitrogen doped reduced graphene oxide

  • 1.

    College of Chemistry and Chemical Engineering Hubei Polytechnic University, Huangshi, 435003, China;

  • 2.

    Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan, 430068, China

  • Fund Project: Supported by the National Natural Science Foundation of China (51372077), Project of Hubei Provincial Department of Education (Q20164503) and Project of Hubei Polytechnic University (16xjz06R, 17xjz01C).

  • 摘要: 采用水热法分别制备了未掺氮和氮掺杂还原氧化石墨烯（N-RGO），以此作为催化性吸附剂，通过活化过硫酸盐（PS）在水相中同时吸附和氧化降解对氯苯酚（4-CP）.氮的引入不仅增强石墨烯吸附性能，而且提高其活化PS能力.通过比较未掺氮RGO与N-RGO对初始浓度为40 mg·L-1的4-CP的吸附和降解速率发现，吸附移除率从21.6%增加至39.4%，对应的降解速率常数k值也从0.003 min-1增加至0.13 min-1.随后研究了N掺杂量、PS初始浓度、N-RGO用量及反应温度对吸附降解过程的影响.结果表明，当氨水浓度为14000 mg·L-1时所制备的N-RGO的性能最优.在PS初始浓度为540 mg·L-1，催化剂用量为120 mg·L-1，pH 值为6.6，温度为25 ℃时，25 min对40 mg·L-1的4-CP的总移除率达93%以上.通过稳定性测试显示N-RGO经4次循环使用后仍具有较高性能，该体系在污水处理领域具有良好应用前景.
    Abstract: Nitrogen doped reduced graphene oxide (N-RGO) and N-free RGO were prepared by hydrothermal treatment of reduced graphene oxide with or without ammonia at 180℃. The adsorption and degradation of 4-chlorophenol (4-CP) on N-free RGO and N-RGO by activating persulfate were studied. The nitrogen modification enhanced not only its adsorption ability, but also its activation ability toward persulfate. Comparing the kinetics of adsorption and degradation of 4-CP (initial concentration 40 mg·L-1) on N-free RGO and N-RGO, the adsorption removal rate was increased from 21.6% to 39.4% and the apparent degradation rate constant k was increased from 0.03 min-1 to 0.13 min-1 after nitrogen modification. The effects of the content of doped N, the amount of PS and N-RGO dosage on the adsorption and degradation of 4-CP were investigated. Under the optimized conditions (ammonia concentration 14000 mg·L-1,dosage 120 mg·L-1, PS concentration 540 mg·L-1, pH 6.6 and reaction temperature 25℃), the total removal rate of 4-CP (initial concentration 40 mg·L-1) within 25 min reached more than 93%.N-RGO can be recycled which shows a good application prospect in the wastewater treatment.
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  • 收稿日期:  2017-05-14
  • 刊出日期:  2017-12-15
王小波, 唐鹏, 丁聪, 曹小艳, 袁颂东, 左小华, 邓祥义. 氮掺杂石墨烯高效移除水中4-氯苯酚[J]. 环境化学, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
引用本文: 王小波, 唐鹏, 丁聪, 曹小艳, 袁颂东, 左小华, 邓祥义. 氮掺杂石墨烯高效移除水中4-氯苯酚[J]. 环境化学, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
shu
WANG Xiaobo, TANG Peng, DING Cong, CAO Xiaoyan, YUAN Songdong, ZUO Xiaohua, DENG Xiangyi. Efficient removal of 4-chlorophenol in water by nitrogen doped reduced graphene oxide[J]. Environmental Chemistry, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
Citation: WANG Xiaobo, TANG Peng, DING Cong, CAO Xiaoyan, YUAN Songdong, ZUO Xiaohua, DENG Xiangyi. Efficient removal of 4-chlorophenol in water by nitrogen doped reduced graphene oxide[J]. Environmental Chemistry, 2017, 36(12): 2641-2649. doi: 10.7524/j.issn.0254-6108.2017051402
shu

氮掺杂石墨烯高效移除水中4-氯苯酚

  • 1.  湖北理工学院化学与化工学院, 黄石, 435003;
  • 2.  湖北工业大学, 太阳能高效利用湖北省协同创新中心, 武汉, 430068
  • 收稿日期:  2017-05-14
基金项目:

国家自然科学基金（51372077），湖北省教育厅青年项目（Q20164503）和湖北理工学院引进人才项目（16xjz06R，17xjz01C）资助.

摘要: 采用水热法分别制备了未掺氮和氮掺杂还原氧化石墨烯（N-RGO），以此作为催化性吸附剂，通过活化过硫酸盐（PS）在水相中同时吸附和氧化降解对氯苯酚（4-CP）.氮的引入不仅增强石墨烯吸附性能，而且提高其活化PS能力.通过比较未掺氮RGO与N-RGO对初始浓度为40 mg·L-1的4-CP的吸附和降解速率发现，吸附移除率从21.6%增加至39.4%，对应的降解速率常数k值也从0.003 min-1增加至0.13 min-1.随后研究了N掺杂量、PS初始浓度、N-RGO用量及反应温度对吸附降解过程的影响.结果表明，当氨水浓度为14000 mg·L-1时所制备的N-RGO的性能最优.在PS初始浓度为540 mg·L-1，催化剂用量为120 mg·L-1，pH 值为6.6，温度为25 ℃时，25 min对40 mg·L-1的4-CP的总移除率达93%以上.通过稳定性测试显示N-RGO经4次循环使用后仍具有较高性能，该体系在污水处理领域具有良好应用前景.

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