以 TiO2 为基体的甲基橙压印聚硅氧烷颗粒的吸附和光催化降解性能

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Wenshuang Wang, Xingya Pan, Xinxin Zhang, Minglin Wang, Zijia Wang, Lingzhi Feng, Xiaolei Wang, Kongyin Zhao
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引用次数: 0

摘要

将分子印迹技术与二氧化钛(TiO2)光催化技术相结合,可以提高二氧化钛纳米粒子对污染物的降解能力和选择性。本研究以二氧化钛为基体,硅烷为功能单体,合成了甲基橙印迹聚硅氧烷颗粒(MIPs)。MIPs 的吸附容量(Qe)为 20.48 mg-g-1,压印效率(IE)为 3.4。在多周期稳定性测试中,这种 MIPs 对甲基橙(MO)具有稳定的压印效率和吸附效率。研究了 MIPs 和非压印聚硅氧烷颗粒(NIPs)的光催化降解性能。与 NIPs 相比,MIPs 对 MO 的光催化降解性能更好,12 分钟内的降解效率为 98.8%,表观速率常数(Kobs)为 0.077 min-1。此外,还通过分子动力学模拟研究了硅烷与 MO 之间的相互作用。这项工作为利用硅烷合成 MIPs 以及分子印迹技术在 TiO2 光催化领域的应用提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adsorption and photocatalytic degradation performances of methyl orange-imprinted polysiloxane particles using TiO2 as matrix

Combining molecular imprinting technique with titanium dioxide (TiO2) photocatalysis technique can improve the degradation ability and selectivity of TiO2 nanoparticles towards pollutants. In this work, methyl orange-imprinted polysiloxane particles (MIPs) were synthesized using TiO2 as matrix and silane as functional monomers. The adsorption capacity (Qe) of MIPs was 20.48 mg·g−1, while the imprinting efficiency (IE) was 3.4. Such MIPs exhibited stable imprinting efficiencies and adsorption efficiencies towards methyl orange (MO) in the multi-cycle stability test. Photocatalytic degradation performances of both MIPs and non-imprinted polysiloxane particles (NIPs) were investigated. Compared with NIPs, MIPs exhibited better photocatalytic degradation performance towards MO, with the degradation efficiency of 98.8% in 12 min and the apparent rate constant (Kobs) of 0.077 min−1. The interaction between silane and MO was also studied through molecular dynamics simulation. This work provides new insights into the use of silane for the synthesis of MIPs as well as the molecular imprinting technique for applications in the field of TiO2 photocatalysis.

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来源期刊
Frontiers of Materials Science
Frontiers of Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
4.20
自引率
3.70%
发文量
515
期刊介绍: Frontiers of Materials Science is a peer-reviewed international journal that publishes high quality reviews/mini-reviews, full-length research papers, and short Communications recording the latest pioneering studies on all aspects of materials science. It aims at providing a forum to promote communication and exchange between scientists in the worldwide materials science community. The subjects are seen from international and interdisciplinary perspectives covering areas including (but not limited to): Biomaterials including biomimetics and biomineralization; Nano materials; Polymers and composites; New metallic materials; Advanced ceramics; Materials modeling and computation; Frontier materials synthesis and characterization; Novel methods for materials manufacturing; Materials performance; Materials applications in energy, information and biotechnology.
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