Synthesis of ZnO Nanoparticles Loaded on Biochar Derived from Spartina alterniflora with Superior Photocatalytic Degradation Performance

Nanomaterials

卷:11

Jian Guo¹  Lu Cai²  Jiaxing Sun³  Yaning Wang³  Shiyao Lu³  Hua Jing³  Lili Ji³  Zhen Wang⁴ 

[1] College of Food and Medical, Zhejiang Ocean University, Zhoushan 316022, China;

[2] Donghai Science and Technology College, Zhejiang Ocean University, Zhoushan 316000, China;

[3] National Marine Facilities Aquaculture Engineering Technology Research Center, Zhejiang Ocean University, Zhoushan 316022, China;

[4] Zhejiang Lichen New Material Technology Co., Ltd., Hangzhou 310000, China;

关键词: zinc oxide;    green synthesis;    Spartina alterniflora;    composite photocatalyst;    dye degradation mechanism;   

DOI  :  10.3390/nano11102479

来源: DOAJ

【 摘 要 】

Spartina alterniflora is an invasive plant from coastal wetlands, and its use in applications has garnered much interest. In this study, a composite photocatalyst (ZnO@BC) was synthesized by preparing zinc oxide (ZnO) nanoparticles with S. alterniflora extracts, S. alterniflora, and one-step carbonization, which was characterized using scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Raman, X-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy (UV–vis DRS), photoluminescence (PL) and N₂ adsorption–desorption isotherm. The degradation capacity and mechanism of malachite green (MG) using ZnO@BC were analyzed under visible irradiation, and the degradation products of malachite green were detected by LC–MS. The results show that ZnO@BC has a larger surface area (83.2 m²/g) and various reactive groups, which enhance its photocatalytic efficiency, with the presence of oxygen vacancy further improving the photocatalytic activity. The total removal rate of malachite green (400 mg/L) using ZnO@BC is up to 98.38%. From the LC–MS analysis, it could be concluded that malachite green is degraded by demethylation, deamination, conjugate structure and benzene ring structure destruction. This study provides a novel idea for the high-value utilization of S. alterniflora.

【 授权许可】

Unknown