化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (6) : 187-189.

科学研究

可磁回收的CoFe₂O₄@RGO@TiO₂催化剂制备及掺杂改性研究

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Preparation and modification of CoFe₂O₄@RGO@TiO₂ as a magnetic recovery catalyst

Ran Wei, Liu Tao, Wang Hui, Wei Fengyu

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Received		Published
2017-03-02		2018-07-03
Issue Date	Revised Date
2018-07-03	2017-03-02

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摘要

采用蒸汽热法制得硫(S)、氮(N)共掺杂铁酸钴(CoFe₂O₄)、氧化石墨烯(GO)、二氧化钛(TiO₂)(CoFe₂O₄@RGO@TiO₂-S/N)催化剂,研究了GO、钛酸四丁酯(TBOT)的用量、反应时间与温度以及S、N掺杂量等对催化剂光催化性能的影响。研究结果表明,在CoFe₂O₄∶GO的质量配合比为5∶1、TBOT∶水(H₂O)的体积配合比为1∶25、S∶N的摩尔配合比为1∶2、180℃反应36h条件下,制得的CoFe₂O₄@RGO@TiO₂-S/N在紫外光照射2h和可见光照射6h对甲基橙(MO)的降解率均达到100%。催化剂磁分离回收循环使用5次后,在紫外光和可见光条件下对MO的降解率仍能达到96.1%和93.1%。该催化剂不仅具备优异的紫外光和可见光光催化活性,还可回收再利用。

Abstract

S,N co-doped CoFe₂O₄@RGO@TiO₂-S/N composites as a magnetic recovery catalyst was synthesized by a facile vapor-thermal method.The dosages of GO and TBOT,reaction temperature,reaction time and S,N doping amount were investigated.The results showed that the prepared CoFe₂O₄@RGO@TiO₂-S/N exhibited superior photocatalytic activity,when the ratios of CoFe₂O₄ to GO,TBOT to H₂O,S to N were 5∶1,1∶25,1∶2,at 180℃ reaction 36h.The degradation rate of methyl orange was 100% both under UV irradiation for 2h and visible light for 6h.Furthermore,after the catalyst was recycled five times,the removal rate of MO was up to 96.1% and 93.1% under UV and visible light illumination,respectively.CoFe₂O₄@RGO@TiO₂-S/N possessed excellent photocatalytic activity under UV and visible light,and can be recycled by an external magnetic field.

关键词

S / N共掺杂TiO₂ / 铁酸钴 / 甲基橙 / 紫外-可见光催化活性

Key words

S,N co-doping TiO₂ / CoFe₂O₄ / methyl orange / UV-Vis photocatalytic activity

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可磁回收的CoFe₂O₄@RGO@TiO₂催化剂制备及掺杂改性研究[J]. 化工新型材料, 2018, 46(6): 187-189 DOI:

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