Ru-B-BiOI催化剂光催化降解甲基橙性能研究
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摘要
用化学还原-沉淀法制备了Ru-B-BiOI催化剂,考察了Bi OI的量和制备方法对Ru-B-BiOI催化降解甲基橙性能的影响;并利用X-射线衍射和透射电子显微镜对催化剂进行了表征。结果表明,Ru-B催化剂几乎没有吸附和降解甲基橙的能力;纯Bi OI吸附甲基橙能力弱,60 min仅光催化降解了30%的甲基橙。随Bi OI量的增加,Ru-B-BiOI催化剂吸附和光催化降解甲基橙的性能都先升高后降低。用Ru-B和Bi OI前体Bi(NO_3)_3·5H_2O同时加方法制备的Ru-B-BiOI催化降解甲基橙的性能最佳。当Bi OI与Ru-B的摩尔比为0.5时,60 min可以光催化降解88%的甲基橙。这说明Bi OI和Ru-B协同作用提高了催化剂吸附和光催化降解甲基橙性能,而且该催化剂具有良好重复使用性能。
The Ru-B-BiOI catalyst was prepared by a chemical reduction-precipitation method. The effect of BiOI amount and preparation method on the performance of Ru-B-BiOI for photocatalytic degradation of methyl orange was investigated. The catalyst was characterized by X-ray diffraction and transmission electron microscopy. The results showed that the Ru-B catalyst had almost no ability to adsorb and degrade methyl orange. Pure BiOI had a weak ability to adsorb methyl orange, and only 30% of methyl orange was photocatalytic degraded in 60 min. With the increase of BiOI amount, the adsorption and photocatalytic degradation of methyl orange over Ru-B-Bi OI catalysts first increased and then decreased. The Ru-B-BiOI catalyst prepared by the simultaneous addition of Ru-B and BiOI precursor Bi(NO_3)_3·5H_2O showed the best performance for the photocatalytic degradation of methyl orange. When the molar ratio of BiOI to Ru-B was 0.5, it could photocatalytic degrade 88% of methyl orange in 60 min. This indicated that the synergistic effect of BiOI and Ru-B improved the performance of catalyst adsorption and photocatalytic degradation of methyl orange. Morvoer, this catalyst had an excellent reusability.
The Ru-B-BiOI catalyst was prepared by a chemical reduction-precipitation method. The effect of BiOI amount and preparation method on the performance of Ru-B-BiOI for photocatalytic degradation of methyl orange was investigated. The catalyst was characterized by X-ray diffraction and transmission electron microscopy. The results showed that the Ru-B catalyst had almost no ability to adsorb and degrade methyl orange. Pure BiOI had a weak ability to adsorb methyl orange, and only 30% of methyl orange was photocatalytic degraded in 60 min. With the increase of BiOI amount, the adsorption and photocatalytic degradation of methyl orange over Ru-B-Bi OI catalysts first increased and then decreased. The Ru-B-BiOI catalyst prepared by the simultaneous addition of Ru-B and BiOI precursor Bi(NO_3)_3·5H_2O showed the best performance for the photocatalytic degradation of methyl orange. When the molar ratio of BiOI to Ru-B was 0.5, it could photocatalytic degrade 88% of methyl orange in 60 min. This indicated that the synergistic effect of BiOI and Ru-B improved the performance of catalyst adsorption and photocatalytic degradation of methyl orange. Morvoer, this catalyst had an excellent reusability.
引文
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[2]阎存仙,罗曼.粉煤灰吸附去处活性艳蓝XBR[J].上海交通大学学报,1998,32(9):126-129.
[3] ROBINSON T, MCMULLAN G, MARCHANT R, et al. Remediation of dyes in textile effluent:a critical review on current treatment technologies with a proposed alternative[J].Bioresource Technol,2001,77(3):247-255.
[4] FORGACS E, CSERH魣TI T, OROS G. Removal of synthetic dyes from wastewaters:a review[J].Environ Int,2004,30(7):953-971.
[5] MART魱NEZ-HUITLE C A, BRILLAS E. Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods:A general review[J].Appl Catal B:Environ,2009,87(3/4):105-145.
[6] MARTINEZ-HUITLE C A, FERRO S. Electrochemical oxidation of organic pollutants for the wastewater treatment:direct and indirect processes[J].Chem Soc Rev,2006,35(12):1324-1340.
[7] DOS SANTOS A B, CERVANTES F J, VAN LIER J B. Review paper on current technologies for decolourisation of textile wastewaters:Perspectives for anaerobic biotechnology[J].Bioresource Technol,2007,98(12):2369-2385.
[8] TINGHUI L, MATSUURA T, SOURIRAJAN S. Effect of membrane materials and average pore sizes on reverse osmosis separation of dyes[J].Ind Eng Chem Res,1983,22(1):77-85.
[9]祁梦兰.声化学氧化-SBR法处理染料废水[J].河北轻化工学院学报,1997,18(1):76-80.
[10]韩影,李微,李静,等.γ-Fe2O3/BiOI光催化材料的制备及其性能研究[J].现代化工,2017,37(3):117-120.
[11]孙海杰,郭伟,周小莉,等.非晶态合金Ru基催化剂在苯选择加氢中的应用进展[J].催化学报,2011,32(1):1-16.