碳酸镉转化制备氢氧化镉及产物光催化降解性

doi:10.11962/1006-4990.2019-0375

无机盐工业 ›› 2020, Vol. 52 ›› Issue (4): 96-99.doi: 10.11962/1006-4990.2019-0375

碳酸镉转化制备氢氧化镉及产物光催化降解性

陈庆春^1,^2,³,邦宇^1,²,万文杰^1,²,晏乐安^1,²,邓慧宇^1,²

1.东华理工大学核资源与环境国家重点实验室,江西南昌 330013
2.东华理工大学材料科学与工程系
3.化工资源有效利用国家重点实验室

收稿日期:2019-10-15 出版日期:2020-04-10 发布日期:2020-04-22
作者简介:陈庆春（1974— ）,男,博士,副教授,主要研究领域为无机纳米材料合成化学,光催化剂与水环境治理技术,已发表论文70多篇;E-mail：qchchen@ecit.cn。
基金资助:
核资源与环境重点实验室开放基金项目(NRE1609);国家自然科学基金项目(51463001);国家自然科学基金项目(51666002);化工资源有效利用国家重点实验室开放基金项目(CRE-2015-C-107)

Preparation and photocatalytic degradation property of cadmium hydroxide transformed from cadmium carbonate

Chen Qingchun^1,^2,³,Bang Yu^1,²,Wan Wenjie^1,²,Yan Lean^1,²,Deng Huiyu^1,²

1.State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China
2.Department of Materials Science and Engineering,East China University of Technology
3.State Key Laboratory of Chemical Resource Engineering

Received:2019-10-15 Online:2020-04-10 Published:2020-04-22

摘要/Abstract

摘要：

用碳酸钠溶液直接混合硫酸镉溶液制备了沉淀碳酸镉,再以沉淀碳酸镉为基体,氢氧化钠溶液为转化剂,通过阴离子交换制备出氢氧化镉纳米材料。采用X射线衍射仪（XRD）和场发射扫描电子显微镜（FESEM）对沉淀碳酸镉和转化产物的结构和形貌进行了表征。结果表明,沉淀碳酸镉的结构遭到破坏,转化完全所得到的氢氧化镉的形貌完全不同于沉淀碳酸镉,为片状组装的不规则球体。紫外光照射下光催化降解罗丹明B染料测试表明,转化产物比沉淀碳酸镉具有更好的光催化降解性能,转化时间不同的产物表现出不同的降解效率。当20 mg的转化产物分散到50 mL 8 mg/L的罗丹明B染料中,在黑暗环境中磁力搅拌吸附120 min达吸附平衡,开启300 W紫外汞灯后,效率最高的转化产物可在180 min内将染料完全降解。

关键词: 碳酸镉, 氢氧化镉, 离子交换法, 光催化降解性

Abstract:

Precipitated cadmium carbonate（P-CdCO₃） was prepared by direct blend method with sodium carbonate solution poured into cadmium sulfate solution.Then,the as-prepared P-CdCO₃ was used as raw materials to produce cadmium hydro-xide[Cd（OH）₂] nanomaterials with sodium hydroxide as transforming agent.The structure and morphology of P-CdCO₃ and Cd（OH）₂ nanomaterials were characterized by powder X-ray diffraction（XRD） and field-emission scanning electron micro-scope（FESEM）.Results showed that the structure of P-CdCO₃ was destroyed and the morphology of completely transformed Cd（OH）₂ was irregular sphere assembled by sheets and totally different from P-CdCO₃. Photocatalytic degradation of Rhoda-mine B under irradiation of UV light tests demonstrated that the transformed products had better photocatalytic degradation property than P-CdCO₃ and different transformed products had various degradation efficiencies.The Rhodamine B could be degraded completely in 180 min under irradiation of 300 W mercury lamp with addition of best transformed product when 20 mg of transformed product was added into 50 mL of 8 mg/L Rhodamine B solution and the system was stirred for 120 min in dark to reach adsorption equilibrium.

Key words: CdCO₃, Cd（OH）₂, ion-exchange method, photocatalytic degradation performance

中图分类号:

TQ132.44

陈庆春,邦宇,万文杰,晏乐安,邓慧宇. 碳酸镉转化制备氢氧化镉及产物光催化降解性[J]. 无机盐工业, 2020, 52(4): 96-99.

Chen Qingchun,Bang Yu,Wan Wenjie,Yan Lean,Deng Huiyu. Preparation and photocatalytic degradation property of cadmium hydroxide transformed from cadmium carbonate[J]. Inorganic Chemicals Industry, 2020, 52(4): 96-99.

图/表 4

参考文献 16

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碳酸镉转化制备氢氧化镉及产物光催化降解性

Preparation and photocatalytic degradation property of cadmium hydroxide transformed from cadmium carbonate

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