| Ag3PO4光催化耦合微生物燃料电池去除罗丹明B |
| Removal of RhB by Photocatalysis with Ag3PO4 on Stainless Steel Integrated in Microbial Fuel Cell as Photocathode |
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| 摘要: 以硝酸银、磷酸钠为原料,一步沉淀法制备了Ag3PO4可见光光催化剂,用硅溶胶将其负载于不锈钢丝网上,经干燥得到光催化电极。以此光催化电极和碳棒分别作为阴极、阳极,在阳极室加入负载生物产电菌的活性炭颗粒,建立光催化耦合微生物燃料电池反应器。以罗丹明B(RhB)为模型污染物,考察了光照、底物浓度、pH值等对污染物去除效率与电池产电性能的影响。结果显示:在100 W卤素灯光照下、外接500 Ω电阻、pH=10、微生物量1.5倍,反应4 h可去除92%的(50 mg·L-1、200 mL)RhB;此时电池输出电压和功率密度分别为124 mV、34.9 mW·m-2。5次重复实验表明该负载型光催化电极具有很好的稳定性。 |
| 关键词: 磷酸银 罗丹明B 微生物燃料电池 可见光光催化 |
| 基金项目: 国家自然科学基金(No.21177018)资助项目。 |
| Abstract: Ag3PO4 visible light photocatalyst was prepared by one step precipitation method from silver nitrate and sodium phosphate. It was loaded onto stainless steel mesh support using silica sol, then the photocatalytic electrode was obtained after drying. Using supported photocatalytic electrode and carbon rod as the cathode and the anode respectively, filling granular carbon already loaded with electrogenic microbes in anode chamber, and the coupled photocatalytic microbial fuel cell reactor was established. With RhB as a model pollutant, the effects of light intensity, substrate concentration, pH value on removal efficiency and the electricity generation were studied. The results showed: using 100 W halogen light, a 500 Ω external resistance, at pH=10, and 1.5 times microbial biomass, after 4 h reaction, 92% RhB in 200 mL 50 mgL-1 solution was removed; at this time the output voltage and the power densities were respectively 124 mV and 34.9 mW·m-2. The supported photocatalytic electrode is stable after five times reuses. |
| Keywords: silver phosphate rodamine B microbial fuel cell visible light photocatalysis |
| 投稿时间：2015-06-28 修订日期：2015-10-13 |
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| 袁华,柳丽芬.Ag3PO4光催化耦合微生物燃料电池去除罗丹明B[J].无机化学学报,2016,32(2):216-222. |
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