分子印迹TiO_2光催化降解水杨酸有机废水研究
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摘要
以水杨酸(SA)为模板分子、邻苯二胺为功能单体,采用紫外光聚合法,在TiO_2表面合成分子印迹聚合物,制备了分子印迹TiO_2(MIP-TiO_2)。利用FT-IR、XRD等方法对制备的MIP-TiO_2进行了表征,并考察了MIP-TiO_2对废水中水杨酸的光催化降解性能。结果表明,制备的MIP-TiO_2具有和TiO_2一样的钛锐矿相结构,但其对水杨酸的降解效果明显优于TiO_2。当MIP-TiO_2投加量为0.6 g/L,紫外光照180 min,SA质量浓度为10 mg/L时, SA去除率达到86.65%,是未改性TiO_2的1.7倍。
Using salicylic acid(SA) as template molecule and O-diaminobenzyl as functional monomers,the molecularly imprinted polymer has been synthesized on the surface of TiO_2 by UV polymerization method,and the molecularly imprinted TiO_2(MIP-TiO_2) prepared. The prepared MIP-TiO_2 has been characterized by means of FT-IR,XRD,etc.,and the photo-catalytic degradation capability of MIP-TiO_2 for salicylic acid investigated. The results show that the prepared MIP-TiO_2 still keeps the same titanium anatase structure as TiO_2,but the degradation effect on salicylic acid is much higher than that of TiO_2. When the dosage of MIP-TiO_2 is 0.6 g/L,ultraviolet irradiation 180 min,and SA mass concentration 10 mg/L,the SA removing rate reaches 86.65%,which is 1.7 times of the result of using unmodified TiO_2.
Using salicylic acid(SA) as template molecule and O-diaminobenzyl as functional monomers,the molecularly imprinted polymer has been synthesized on the surface of TiO_2 by UV polymerization method,and the molecularly imprinted TiO_2(MIP-TiO_2) prepared. The prepared MIP-TiO_2 has been characterized by means of FT-IR,XRD,etc.,and the photo-catalytic degradation capability of MIP-TiO_2 for salicylic acid investigated. The results show that the prepared MIP-TiO_2 still keeps the same titanium anatase structure as TiO_2,but the degradation effect on salicylic acid is much higher than that of TiO_2. When the dosage of MIP-TiO_2 is 0.6 g/L,ultraviolet irradiation 180 min,and SA mass concentration 10 mg/L,the SA removing rate reaches 86.65%,which is 1.7 times of the result of using unmodified TiO_2.
引文
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[3]王刚.水杨酸在水溶液中的光化学降解研究[D].河南:河南师范大学,2012.
[4]于洪涛,陈硕,全燮,等.光催化水处理消毒的原理、材料和反应器[J].化学进展,2017(9):1030-1041.
[5]刘杰,汪恂,朱雷,等.钆、硫共掺杂TiO2光催化处理染料废水的研究[J].工业水处理, 2015,35(7):27-30.
[6] Wang Mengye,Iocozzia J,Sun Lan,et al. Correction:Inorganic-modified semiconductor TiO2nanotube arrays for photocatalysis[J].Energy&Environmental Science,2017,7(7):2182-2202.
[7]何莉娜,陈芳艳,唐玉斌.分子印迹型TiO2的制备及其对邻苯二甲酸二(2-乙基)己酯的光催化性能[J].环境工程学报,2017,6(11):3532-3538.
[8] Rizzo L,Meric S,Kassinos D,et al. Degradation of diclofenac by TiO2photocatalysis:UV absorbance kinetics and process evaluation through a set of toxicity bioassays[J]. Water Research,2009,43(4):979-988.
[9] Shen Xiantao,Zhu Lihua,Liu Guoxia,et al. Synthesis of molecular imprinted polymer coated photocatalysts with high selectivity[J].Chemical Communication,2007,34(11):1163-1165.
[10]王嘉楠,李媛媛,倪刚,等.分子印迹型纳米TiO2材料的制备及其光催化选择性能的研究[J].化工新型材料,2015,43(11):49-51.
[11]胡丹.分子印迹型TiO2光催化材料的制备及其在超滤膜上的负载处理废水性能的研究[D].陕西:长安大学,2015.
[12]魏声培,安娅,秦好丽.水杨酸分子印迹掺氮TiO2粉末的制备及在可见光下的选择性光催化研究[J].华南农业大学学报,2016,37(4):134-140.
[13]王静,汪恂,陈沾,等.镧尧钇共掺杂纳米ZnO的制备及处理染料废水研究[J].工业水处理,2017,37(1):82-85.
[14]王治强.分子印迹TiO2催化降解有机污染物[D].江苏:江南大学,2014.