Sonophotocatalytic degradation of dye CI Acid Orange 7 by TiO2 and Ag nanoparticles immobilized on corona pretreated polypropylene non-woven fabric
Sonophotocatalytic degradation of dye CI Acid Orange 7 by TiO2 and Ag nanoparticles immobilized on corona pretreated polypropylene non-woven fabric
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DOI：
10.1016/j.ultsonch.2014.11.017
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发表时间：
2015-05-01
影响因子：
8.4
通讯作者：
Radetic, Maja
中科院分区：
文献类型：
--
作者：
Markovic, Darka;Saponjic, Zoran;Radetic, Maja
本研究探讨了使用电晕预处理的聚丙烯（PP）无纺布作为载体的胶体二氧化钛和银纳米粒子的固定，以去除染料C. I。来自水溶液的酸性橙子7。通过超声催化、电催化和超声光催化对负载有TiO 2纳米颗粒的电晕预处理织物、双负载有TiO 2纳米颗粒的电晕预处理织物和负载有TiO 2纳米颗粒的电晕预处理织物在沉积Ag纳米颗粒之前和之后的染料去除效率进行了评价。此外，还研究了PP无纺布在这些加工过程中的稳定性。通过SEM、EDX和AAS分析对基底进行了表征。采用紫外-可见分光光度法测定染料浓度的变化。与声催化和光催化不同，在240-270分钟的声光催化后，已经从溶液和非织造织物中完全去除染料。在沉积纳米TiO 2之前，电晕预处理的负载有Ag纳米颗粒的PP无纺布提供了优异的降解效率和上级可重复使用性。在酸性条件下，所有研究样品的存在下，染料的超声光催化降解是最突出的。虽然这种纳米复合材料系统确保染料溶液的快速变色，但由于PP降解，在超声光催化后测量的水的TOC值不令人满意。因此，建议在每个案例研究中包括TOC评估，其中使用不同的TiO 2纳米颗粒载体，因为这些纳米颗粒可以保证从溶液中去除染料，但载体的稳定性可能存在问题，导致更严重的环境影响。(C)2014爱思唯尔有限公司版权所有。
This study discusses the possibility of using corona pre-treated polypropylene (PP) non-woven fabric as a support for immobilization of colloidal TiO2 and Ag nanoparticles in order to remove dye C.I. Acid Orange 7 from aqueous solution. Dye removal efficiency by sonocatalysis, photocatalysis and sonophotocatalysis was evaluated on corona pre-treated fabric loaded with TiO2 nanoparticles, corona pre-treated fabric double loaded with TiO2 nanoparticles and corona pre-treated fabrics loaded with TiO2 nanoparticles before and after deposition of Ag nanoparticles. In addition, the stability of PP non-woven fabric during these processes was investigated. The substrates were characterized by SEM, EDX and AAS analyses. The change of the dye concentration was evaluated by UV-VIS spectrophotometry. Unlike sonocatalysis and photocatalysis, complete dye removal from both solution and non-woven fabric was obtained already after 240-270 min of sonophotocatalysis. Corona pre-treated PP non-woven fabric loaded with Ag nanoparticles prior to deposition of TiO2 nanoparticles provided excellent degradation efficiency and superior reusability. Sonophotocatalytic degradation of dye in the presence of all investigated samples was the most prominent in acidic conditions. Although this nanocomposite system ensured fast discoloration of dye solution, TOC values of water measured after sonophotocatalysis were not satisfactory because of PP degradation. Therefore, it is suggested to include TOC evaluation in each case study where different supports for TiO2 nanoparticles are used since these nanoparticles may guarantee the dye removal from solution but the stability of support could be problematic causing even more serious environmental impact. (C) 2014 Elsevier B.V. All rights reserved.