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.
作者
王亚洋
王亦凡
张彬
杨小洁
李月生
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)
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
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。
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
TiO_(2)
Polymethacrylate N
N-dimethylaminoethyl methacrylate(PDMAEMA)
Radiation grafting
Photocatalytic
Cr(Ⅵ)
Adsorption-photocatalytic reduction
