摘要
Ti_(3)C_(2)T_(x) MXene材料具有二维层状结构及丰富的表面官能团,是一种非常有潜力的重金属离子吸附材料,但其层间距较小,且在水溶液中的稳定性较差。本工作探索了Ti_(3)C_(2)T_(x)的改性策略,提高其化学稳定性与离子吸附容量,利用一步水热方法制备出不同Fe_(3)O_(4)掺杂量的Fe_(3)O_(4)-Ti_(3)C_(2)T_(x)(FeMX)复合吸附剂材料。研究结果表明:FeMX吸附剂对Pb(Ⅱ)的理论饱和吸附量可达到210.54 mg/g。研究进一步揭示了FeMX材料对Pb(Ⅱ)离子的吸附机理,Fe_(3)O_(4)纳米颗粒均匀分散、插层在Ti_(3)C_(2)T_(x)纳米片层间,有效增加了Ti_(3)C_(2)T_(x)纳米片的比表面积与层间距,提高了对Pb(Ⅱ)的去除能力。本研究可为发展优异重金属离子吸附特性的MXene基复合材料提供基础数据。
Ti_(3)C_(2)T_(x) MXene is a potential adsorbent of heavy metal ions due to its two-dimensional layered structure and abundant surface functional groups.However,it has disadvantages of limited layer spacing and poor stability in aqueous solution.Here,the modification strategy of Ti_(3)C_(2)T_(x) was explored to improve its chemical stability and ion adsorption capacity among which Fe_(3)O_(4)-Ti_(3)C_(2)T_(x)(FeMX)adsorbent with different doping amounts of Fe_(3)O_(4) were prepared by one-step hydrothermal method.The results showed that the maximum theoretical Pb(II)adsorption capacity of FeMX adsorbent could reach 210.54 mg/g.Its adsorption mechanism was further revealed that Fe_(3)O_(4) nanoparticles were evenly dispersed and intercalated between Ti_(3)C_(2)T_(x) nanosheets,which effectively increased specific surface area and layer spacing of Ti_(3)C_(2)T_(x) nanosheets,leading to improving Pb(II)removal ability.Therefore,this study provides a promising route for developing MXene matrix composites with excellent heavy metal ion adsorption properties.
作者
王世怡
冯爱虎
李晓燕
于云
WANG Shiyi;FENG Aihu;LI Xiaoyan;YU Yun(School of Material and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China;Key Laboratory of Inorganic Coating Materials CAS,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2023年第5期521-528,I0005-I0007,共11页
Journal of Inorganic Materials
