摘要
为优化聚丙烯腈基光催化膜在可见光下的光催化性能,以羧基化二氧化钛(TiO_(2))和咪唑沸石骨架(ZIF-8)为原料,成功制备了一种新型异质结光催化剂TiO_(2)@ZIF-8,并以热诱导相分离法(TIPS)制备的聚丙烯腈-丙烯酸甲酯(P(AN-MA))膜为基膜,经碱性水解和氢键自组装得到TiO_(2)@ZIF-8-HP(AN-MA)光催化膜,并采用XRD、红外光谱仪、扫描电镜等方法对复合膜的光催化性能进行分析。结果表明:成功制备的TiO_(2)@ZIF-8在可见光波段表现出了优异的吸光优势,在氢键的作用下,以氢键自组装法将TiO_(2)@ZIF-8锚定在P(AN-MA)基膜的表面;与TiO_(2)@HP(AN-MA)膜相比,TiO_(2)@ZIF-8-HP(AN-MA)膜对罗丹明B溶液的吸附能力从7.5%提高到19.1%,可见光下光催化膜的降解效率从61.2%提高到99.2%;TiO_(2)@HP(AN-MA)膜也具有良好的可循环性,经过4个循环的测试,仍能保持90%以上的降解罗丹明B的效率。
In order to optimize the photocatalytic performance of the polyacrylonitrile-based photocatalytic membrane under visible light,a novel heterojunction photocatalyst(TiO_(2)@ZIF-8)was successfully prepared using carboxylated titanium dioxide(TiO_(2))and zeolite imidazole skeleton(ZIF-8)as raw materials.Poly(acrylonitrile-co-methyl acrylate)(P(AN-MA))membrane formed via the thermally induced phase separation method was used as the matrix,and TiO_(2)@ZIF-8-HP(AN-MA)photocatalytic membrane was obtained after hydrolysis and hydrogen bond self-assembly.The photocatalytic performance of the composite membranes were analyzed by XRD,FTIR and SEM.The results show that TiO_(2)@ZIF-8 was successfully prepared and exhibited excellent light absorption advantages in the visible band.TiO_(2)@ZIF-8 particles were anchored to the surface of P(AN-MA)based membrane with the assistance of hydrogen bonding.Compared with TiO_(2)@HP(AN-MA)membrane,the adsorption capacity of TiO_(2)@ZIF-8-HP(AN-MA)membrane to Rhodamine B solution increased from 7.5%to 19.1%,while the photocatalytic degradation efficiency increased from 61.2%to 99.2%under the visible light.The TiO_(2)@HP(AN-MA)membrane also showed excellent cyclability,which still maintains more than 90%of the degradation efficiency to Rhodamine B after 4 cycles of testing.
作者
韩娜
张浩然
张雅琪
谭林立
HAN Na;ZHANG Hao-ran;ZHANG Ya-qi;TAN Lin-li(State Key Laboratory of Separation Membrane and Processes,Tiangong University,Tianjin 300387,China;School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China)
出处
《天津工业大学学报》
CAS
北大核心
2021年第3期1-9,共9页
Journal of Tiangong University
基金
国家重点研发计划资助项目(2016YFC0400509)
天津市大学生创新训练计划项目(201810058096)
青年骨干教师出国研修项目([2018]10038)。
关键词
聚(丙烯腈-丙烯酸甲酯)
异质结光催化剂
氢键自组法
可见光催化
光催化膜
罗丹明B
poly(acry lonicrile-co-methyl acrylate)(P(AN-MA))
heterojunction photocatalyst
hydrogen bond self-assembly
visible light catalys is
photocatalysis membrane
Rhodamine B
