脉冲激光诱导光解合成的石墨烯/金和氧化石墨烯/金纳米复合材料的光催化性能

Photocatalytic Properties of Graphene/Gold and Graphene Oxide/Gold Nanocomposites Synthesized by Pulsed Laser Induced Photolysis.

作者信息

Chen Li-Hsiou, Shen Huan-Ting, Chang Wen-Hsin, Khalil Ibrahim, Liao Su-Yu, A Yehye Wageeh, Liu Shih-Chuan, Chu Chih-Chien, Hsiao Vincent K S

机构信息

Department of Pulmonary Medicine, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung 427, Taiwan.

Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung 40201, Taiwan.

出版信息

Nanomaterials (Basel). 2020 Oct 7;10(10):1985. doi: 10.3390/nano10101985.

Graphene (Gr)/gold (Au) and graphene-oxide (GO)/Au nanocomposites (NCPs) were synthesized by performing pulsed-laser-induced photolysis (PLIP) on hydrogen peroxide and chloroauric acid (HAuCl) that coexisted with Gr or GO in an aqueous solution. A 3-month-long aqueous solution stability was observed in the NCPs synthesized without using surfactants and additional processing. The synthesized NCPs were characterized using absorption spectroscopy, transmission electron microscopy, Raman spectroscopy, energy dispersive spectroscopy, and X-ray diffraction to prove the existence of hybrid Gr/Au or GO/Au NCPs. The synthesized NCPs were further evaluated using the photocatalytic reaction of methylene blue (MB), a synthetic dye, under UV radiation, visible light (central wavelength of 470 nm), and full spectrum of solar light. Both Gr/Au and GO/Au NCPs exhibited photocatalytic degradation of MB under solar light illumination with removal efficiencies of 92.1% and 94.5%, respectively.

通过对过氧化氢和氯金酸（HAuCl）进行脉冲激光诱导光解（PLIP）来合成石墨烯（Gr）/金（Au）和氧化石墨烯（GO）/Au纳米复合材料（NCPs），其中过氧化氢和氯金酸与Gr或GO在水溶液中共存。在不使用表面活性剂和额外处理的情况下合成的NCPs在水溶液中具有3个月的稳定性。使用吸收光谱、透射电子显微镜、拉曼光谱、能量色散光谱和X射线衍射对合成的NCPs进行表征，以证明混合的Gr/Au或GO/Au NCPs的存在。使用亚甲基蓝（MB）（一种合成染料）在紫外线辐射、可见光（中心波长为470nm）和太阳光全光谱下的光催化反应对合成的NCPs进行进一步评估。在太阳光照射下，Gr/Au和GO/Au NCPs均表现出对MB的光催化降解，去除效率分别为92.1%和94.5%。