辐射接枝制备聚甲基丙烯酸N,N-二甲氨基乙酯-TiO_(2)光催化剂及其对Cr(Ⅵ)的吸附还原性能  

Preparation of poly(N,N-dimethylaminoethyl methacrylate)-TiO_(2)photocatalyst by radiation grafting and its adsorption and reduction performance for Cr(Ⅵ)

作　　者：王亚洋 王亦凡 张彬[2] 杨小洁 李月生[2,3] WANG Yayang;WANG Yifan;ZHANG Bin;YANG Xiaojie;LI Yuesheng(School of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430074,China;Key Laboratory of Radiation Chemistry and Functional Materials,Hubei Province,Hubei University of Science and Technology,Xianning 437000,China;Hubei Industrial Technology Research Institute of Intelligent Health,Xianning 437000,China)

机构地区：[1]武汉科技大学化学与化工学院,武汉430074 [2]湖北科技学院辐射化学与功能材料湖北省重点实验室,咸宁437000 [3]湖北省智慧康养产业技术研究院,咸宁437000

出　　处：《辐射研究与辐射工艺学报》2023年第1期33-41,共9页Journal of Radiation Research and Radiation Processing

基　　金：湖北省高等学校优秀中青年科技创新团队项目(T2020022);咸宁市科技研究与开发(高新类研发重点专项)项目(2021GXYF021);湖北省大学生创新创业训练计划项目(S201910927021);湖北科技学院科学发展基金(2021ZX01、2022FH09)资助。

摘　　要：以二氧化钛(TiO_(2))为基材,甲基丙烯酸二甲氨基乙酯(DMAEMA)为单体,采用共辐射接枝法成功合成了聚甲基丙烯酸N,N-二甲氨基乙酯-TiO_(2)(TiO_(2)-g-PDMAEMA)吸附-光催化剂。同时探究了单体浓度和吸收剂量对重金属离子吸附作用的影响。利用扫描电镜、X射线衍射仪、傅里叶红外光谱分析仪、热重分析仪、X射线光电子能谱、接触角等表征手段,证实了电子束共辐射接枝法成功将DMAEMA单体接枝到TiO_(2)表面。在吸收剂量为60 kGy、单体浓度为20%时,TiO_(2)-g-PDMAEMA对10 mg/L Cr(Ⅵ)具有较佳的吸附能力,吸附容量可达10.75 mg/g。在可见光诱导下,吸收剂量为60 kGy、单体浓度为10%时,制备的TiO_(2)-g-PDMAEMA具有最佳的吸附-光催化还原能力,对10 mg/L Cr(Ⅵ)的去除率达85.56%。该新型光催化剂上的吸附-光催化协同效应可以满足去除水中Cr(Ⅵ)污染的要求。TiO_(2)-doped polymethacrylate N,N-dimethylaminoethyl methacrylate(DMAEMA)(TiO_(2)-gPDMAEMA)was successfully synthesized by the co-radiation grafting method with titanium dioxide(TiO_(2))and DMAEMA as the base and the monomer,respectively.Meanwhile,the effects of monomer concentration and absorbed dose on the adsorption of heavy metal ion were investigated.A series of characterizations,including X-ray diffraction,scanning electron microscopy,Fourier-transform infrared spectroscopy,thermogravimetry,X-ray photoelectron spectroscopy and contact angle,confirmed that DMAEMA monomer was successfully grafted onto Ti O2 surface by electron beam co-radiation grafting method.When the absorbed dose was 60 kGy and the monomer concentration was 20%,TiO_(2)-g-PDMAEMA exhibited excellent adsorption capacity for Cr(Ⅵ,10 mg/L),up to 10.75 mg/g.In addition,the Ti O2-g-PDMAEMA prepared at 60 kGy absorption dose and 10%monomer concentration displayed the optimal adsorption-photocatalytic reduction ability under visible-light irradiation,and the removal rate of Cr(Ⅵ,10 mg/L)reached 85.56%.In conclusion,the adsorption-photocatalytic synergistic effect of this new photocatalyst could meet the requirement of removing Cr(Ⅵ)from water.

关 键 词：二氧化钛 甲基丙烯酸二甲氨基乙酯 辐射接枝 光催化 Cr(Ⅵ) 吸附-光催化还原 

分 类 号：TL13[核科学技术—核能科学]