静电纺丝还原氧化石墨烯/TiO₂/聚（丙烯腈-co-马来酸）复合纳米纤维用于高效吸附和光催化去除孔雀石绿和隐色孔雀石绿。
Electrospun reduced graphene oxide/TiO/poly(acrylonitrile-co-maleic acid) composite nanofibers for efficient adsorption and photocatalytic removal of malachite green and leucomalachite green.
机构信息
College of Biological and Environmental Engineering, Changsha University, Changsha, 410003, PR China; Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China.
Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China.
出版信息
Chemosphere. 2020 Jan;239:124764. doi: 10.1016/j.chemosphere.2019.124764. Epub 2019 Sep 10.
Electrospun reduced graphene oxide/TiO/poly(acrylonitrile-co-maleic acid) composite nanofibers (E-spun RGO/TiO/PANCMA NFs) were fabricated using electrospinning of the dispersive solution of PANCMA, GO and TiO followed by post-chemical reduction. The obtained composite nanofibers were compressed in a dialyzer and then used to absorb and degrade malachite green (MG) and leucomalachite green (LMG) from aqueous solution. Compared to the E-spun TiO/PANCMA and GO/TiO/PANCMA NFs, the E-spun RGO/TiO/PANCMA NFs exhibited higher adsorption capacity and photocatalytic degradation ability. Under optimized conditions, 90.6% of MG and 93.7% of LMG from 50 mL aqueous sample solution were adsorbed on the RGO/TiO/PANMA NFs (3.0 mg fibers) in 2.0 min, and subsequent the 91.4% and 95.2% of MG and LMG adsorbed on the NFs were degradated in 60 min under UV irradiation, respectively. In addition, the E-spun RGO/TiO/PANMA NFs exhibited good reusability and could be reused in multiple cycles of operations for adsorption and photocatalytic degradation of MG and LMG. This work demonstrated that the electrospun composite nanofibers are promising materials for removal of pollutants from environmental water samples.
采用静电纺丝法制备了还原氧化石墨烯/TiO/丙烯腈共马来酸(PANCMA)复合纳米纤维(E-spun RGO/TiO/PANCMA NF)，该方法是将 PANCMA、GO 和 TiO 的分散溶液进行静电纺丝，然后进行后化学还原。将得到的复合纳米纤维在透析器中压缩，然后用于从水溶液中吸附和降解孔雀石绿（MG）和隐色孔雀石绿（LMG）。与 E-spun TiO/PANCMA 和 GO/TiO/PANCMA NF 相比，E-spun RGO/TiO/PANCMA NF 表现出更高的吸附容量和光催化降解能力。在优化条件下，从 50ml 水样溶液中，3.0mg 纤维的 RGO/TiO/PANCMA NF 在 2.0min 内吸附 50ml 水样溶液中 90.6%的 MG 和 93.7%的 LMG，随后在 UV 照射下，吸附在 NF 上的 91.4%和 95.2%的 MG 和 LMG 在 60min 内被降解。此外，E-spun RGO/TiO/PANCMA NF 表现出良好的可重复使用性，可在多次吸附和光催化降解 MG 和 LMG 的操作循环中重复使用。这项工作表明，静电纺丝复合纳米纤维是从环境水样中去除污染物的有前途的材料。
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