Pham Vy Ngoc, Lee Sangyeob, Lee Hangil, Kim Hyun Sung
Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea.
Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea.
Inorg Chem. 2023 Feb 27;62(8):3703-3711. doi: 10.1021/acs.inorgchem.3c00124. Epub 2023 Feb 16.
Photocatalysts are useful for various applications, including the conservation and storage of energy, wastewater treatment, air purification, semiconductors, and production of high-value-added products. Herein, ZnCdS nanoparticle (NP) photocatalysts with different concentrations of Zn ions ( = 0.0, 0.3, 0.5, or 0.7) were successfully synthesized. The photocatalytic activities of ZnCdS NPs varied with the irradiation wavelength. X-ray diffraction, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, and ultraviolet-visible spectroscopy were used to characterize the surface morphology and electronic properties of the ZnCdS NPs. In addition, in situ X-ray photoelectron spectroscopy was performed to investigate the effect of the concentration of Zn ions on the irradiation wavelength for photocatalytic activity. Furthermore, wavelength-dependent photocatalytic degradation (PCD) activity of the ZnCdS NPs was investigated using biomass-derived 2,5-hydroxymethylfurfural (HMF). We observed that the selective oxidation of HMF using ZnCdS NPs resulted in the formation of 2,5-furandicarboxylic acid via 5-hydroxymethyl-2-furancarboxylic acid or 2,5-diformylfuran. The selective oxidation of HMF was dependent on the irradiation wavelength for PCD. Moreover, the irradiation wavelength for the PCD depended on the concentration of Zn ions in the ZnCdS NPs.
光催化剂可用于各种应用，包括能量的储存与保存、废水处理、空气净化、半导体以及高附加值产品的生产。在此，成功合成了具有不同锌离子浓度（= 0.0、0.3、0.5或0.7）的ZnCdS纳米颗粒（NP）光催化剂。ZnCdS NPs的光催化活性随照射波长而变化。使用X射线衍射、高分辨率透射电子显微镜、能量色散X射线光谱和紫外可见光谱来表征ZnCdS NPs的表面形态和电子性质。此外，进行原位X射线光电子能谱研究锌离子浓度对光催化活性照射波长的影响。此外，使用生物质衍生的2,5-羟甲基糠醛（HMF）研究了ZnCdS NPs的波长依赖性光催化降解（PCD）活性。我们观察到，使用ZnCdS NPs对HMF进行选择性氧化会通过5-羟甲基-2-呋喃羧酸或2,5-二甲酰基呋喃形成2,5-呋喃二甲酸。HMF 的选择性氧化取决于PCD的照射波长。此外，PCD的照射波长取决于ZnCdS NPs中锌离子的浓度。
