Novel and versatile TiO2 thin films on PET for photocatalytic removal of contaminants of emerging concern from water
Novel and versatile TiO2 thin films on PET for photocatalytic removal of contaminants of emerging concern from water
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DOI：
10.1016/j.cej.2019.03.284
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发表时间：
2019-08
影响因子：
15.1
通讯作者：
R. B. Marcelino;C. C. Amorim-C.;Marina Ratova;Brice Delfour-Peyrethon;Peter Kelly
中科院分区：
文献类型：
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作者：
R. B. Marcelino;C. C. Amorim-C.;Marina Ratova;Brice Delfour-Peyrethon;Peter Kelly
目前的工作提出了新的和通用的光催化表面，旨在从水中去除污染物的新兴问题（CEC）。在聚对苯二甲酸乙二醇酯（PET）表面（PET-TiO 2）上沉积二氧化钛（TiO 2）的光催化薄膜，并通过天然且无害的姜黄素（姜黄）进行光敏化。采用高功率脉冲磁控溅射（HiPIMS）技术，在无溶剂、无热处理的条件下，采用一步法制备了TiO 2薄膜。通过不同的技术（SEM/EDS、STEM、AFM、UV-Vis光谱和通过水滴接触角的润湿性）来表征光催化膜。通过降解两种模型CEC来评估光催化活性：用于世界各地不同作物（咖啡、水稻、水果等）的杀真菌剂多菌灵（CBZ），以及人为污染示踪剂咖啡因（CAF）。光催化处理7 h后，在紫外可见光照射下，这些模型CEC的去除率可达39%。通过溶解性有机碳分析进一步研究了降解过程，去除率高达80%，并与Aliivibrio fischeri进行了急性生态毒性试验，表明毒性降低或无变化。PET-TiO 2表面在连续5次使用循环中保持稳定，动力学速率相似。最后，通过使用h+，HO自由基dotandradical dotO 2 −捕获剂，在存在和不存在姜黄的情况下，研究了光催化反应中涉及的物种。结果表明，由于光催化剂和光敏剂之间的协同效应，姜黄的加入导致光生dotO 2 −自由基的增加。结果表明，PET-TiO 2表面作为一个简单的解决方案，从沃茨中去除CEC的潜力，使用灵活的，可扩展的，可重复使用的和环境友好的光催化材料。
The current work presents new and versatile photocatalytic surfaces designed to remove contaminants of emerging concerns (CECs) from water. Photocatalytic thin films of titanium dioxide (TiO2) were deposited on a polyethylene terephthalate (PET) surface (PET-TiO2) and photosensitized by a natural and non-hazardous curcumin (turmeric). The TiO2thin film was deposited in a single stage and solvent-free process, without thermal post treatment, using the high power impulse magnetron sputtering (HiPIMS) technique. The photocatalytic film was characterized by different techniques (SEM/EDS, STEM, AFM, UV–Vis spectroscopy, and wettability via water droplet contact angle). The photocatalytic activity was assessed by the degradation of two model CECs: the fungicide carbendazim (CBZ), used in different crops around the world (coffee, rice, fruits, etc.), and the anthropogenic pollution tracer caffeine (CAF). Removal of these model CECs of up to 39% were achieved under combined UV and visible irradiation under 7 h photocatalytic treatments. The degradation process was further studied by dissolved organic carbon analysis, with up to 80% removal, and acute ecotoxicity tests withAliivibrio fischeri, indicating reduction of toxicity or non-change. The PET-TiO2surfaces remained stable for 5 consecutive cycles of use, with similar kinetic rates. Finally, the species involved in photocatalytic reactions were investigated by the use of h+, HOradical dotandradical dotO2−trapping agents, both in the presence and absence of turmeric. The results indicated that the addition of the turmeric led to an increase in photogeneratedradical dotO2−radicals due to a synergistic effect between the photocatalyst and photosensitizer. The results demonstrate the potential of the PET-TiO2surfaces as a straightforward solution for the removal of CECs from waters, using a flexible, scalable, reusable and environmental friendly photocatalytic material.