化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (8) : 272-275.

开发与应用

Bi₂O₃/ZnO复合材料的制备及太阳光处理孔雀石绿的应用研究

^1,2,3

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Preparation of Bi₂O₃/ZnO and application in sunlight treatment for malachite green

Yang Weisen^1,2,3, Zhou Meizhu¹, Jian Shaoju^1,2,3, Lin Weisheng^1,2,3, Wang Zhaoli^1,2,3

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Received
2017-10-30
Issue Date	Revised Date
2018-09-18	2017-10-30

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摘要

以竹纤维为模板,五水合硝酸铋[Bi(NO₃)₃·5H₂O]和二水合醋酸锌[Zn(OAc)₂·2H₂O]为原料,采用浸渍-热转化法制备一系列Bi含量不同的氧化铋(Bi₂O₃)/氧化锌(ZnO)复合材料。通过热重分析、扫描电子显微镜、X射线衍射等方法对复合材料进行分析表征。以孔雀石绿染料为模拟污染物,在太阳光照射下进行光降解实验,探究了煅烧温度和Bi掺杂量对复合材料光催化活性的影响。研究结果表明:复合材料保持了竹纤维模板物的纤维形貌;煅烧温度和Bi掺杂量对Bi₂O₃/ZnO光催化性能影响显著。600℃煅烧2h制备的Bi掺杂量为2.5%(摩尔分数)的Bi₂O₃/ZnO催化剂对孔雀石绿降解效果最佳,太阳光照射240min后对100mL质量浓度为20mg/L的孔雀石绿降解率可达95.84%。催化剂重复利用4次后对孔雀石绿的催化降解率仍可保持在92%以上。

Abstract

Using bamboo fiber as a template,Bi(NO₃)₃·5H₂O and Zn(OAc)₂·2H₂O as the raw materials to make a series of Bi₂O₃/ZnO composites with different amounts of Bi.TG,XRD and SEM were employed to characterize the structure and morphology of composites.The degradation of malachite green under sunlight was used to evaluate the effects of calcination temperature and Bi doped amounts on the photocatalytic performance of composites.The experimental results showed that composite materials kept the fiber morphology of bamboo fiber.The calcination temperature and Bi doped amounts had a significant effect on thephtotocatalytic performance of Bi₂O₃/ZnO.The catalytic activity was best when ZnO doped with 2.5% Bi obtained under 600℃ for 2h,the degradation of 100 mL 20mg/L malachite green solution was 95.84% under sunlight exposure for 240 min,and the degradation rate was still maintained above 92% after reused for 4 times.It can be seen that Bi₂O₃/ZnO composites were of great significance in the treatment of malachite green dye wastewater.

关键词

氧化铋 / 氧化锌 / 太阳光 / 孔雀石绿

Key words

Bi₂O₃ / ZnO / sunlight / malachite green

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Bi₂O₃/ZnO复合材料的制备及太阳光处理孔雀石绿的应用研究[J]. 化工新型材料, 2018, 46(8): 272-275 DOI:

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