Article
Environmental Sciences
Sandeep Kumar Jena, Rajkumar Sadasivam, Gopinath Packirisamy, Pichiah Saravanan
Summary: This study demonstrated the development of PAN/CuO-ZnO nanocomposites with excellent photocatalytic properties through hydrothermal and calcination methods. The nanocomposites obtained through calcination exhibited better optical response and robust electronic structures, leading to higher photocatalytic efficiency.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
Yinli Duan, Jing Ma, Jianan Dai, Liangsheng Qiang, Juanqin Xue
Summary: Efficient and low-cost photocatalysts containing Indium hydroxide anchored on zinc oxide with various morphologies were synthesized via a hydrothermal approach. The interaction between In(OH)(3) and ZnO was found to enhance the photocatalytic performance of ZnO. The photodegradation experiments showed that the photocatalytic activity of the In(OH)(3)/ZnO nanocomposites correlated with the material morphology, with the highest MB removal efficiency reaching 90.5%.
APPLIED SURFACE SCIENCE
(2021)
Article
Environmental Sciences
Saravanan Murugesan, Vigneshwar Sasibabu, Gautham B. Jegadeesan, Ponnusami Venkatachalam
Summary: This study presents the photocatalytic efficiency of ZnO-CeO2 nanocomposites for the degradation of a model Reactive Black (RB) dye. Addition of CeO2 to ZnO resulted in lower band gap energy and enhanced oxidation of RB dye.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Qiping Shi, Zhaoyu Luo, Liyun Jiang, Xiaojiao Li, Cuizhen Bai, Qi Yu
Summary: Co-doped ZnO nanocomposites were prepared via hydrothermal method on flexible substrates of polyethylene terephthalate-indium tin oxide (PET-ITO). The crystal structure, doping mechanism, and photocatalytic properties were intensively investigated. Compared to pure ZnO, Co-ZnO exhibited distinct photocatalytic activity with a degradation rate of 71.36% for methylene blue (MB) solution. The stable electronic structures and possible electronic sites for Co elements were discussed through theoretical calculations. Meanwhile, the mechanism to enhance the photocatalytic activity of ZnO was also discussed.
Article
Chemistry, Multidisciplinary
Xiaoqian Ai, Shun Yan, Ligang Ma
Summary: In this study, a hierarchical ZnO microsphere precursor was prepared using a hydrothermal method, and a controllable morphology ZnO catalyst was produced through annealing at different temperatures. The catalyst annealed at 400 degrees C showed the best photocatalytic activity for the degradation of dye molecules, and its structure was confirmed to be a 2D cellular network composed of two-dimensional nanosheets through electron microscopy measurements.
Article
Chemistry, Multidisciplinary
Chuanfeng Zang, Hao Chen, Xiangye Han, Wei Zhang, Junfang Wu, Fanghua Liang, Jiamu Dai, Hongchao Liu, Guangyu Zhang, Ke-Qin Zhang, Mingzheng Ge
Summary: PVDF/ZnO/CuS photocatalysts with ZnO/CuS heterojunctions were synthesized, which showed improved visible-light photocatalytic efficiency and excellent recyclability.
Article
Chemistry, Multidisciplinary
Renu Yadav, Tejpal S. Chundawat, Praveen K. Surolia, Dipti Vaya
Summary: Photocatalytic degradation of dyes using metal oxides and their composites is an effective method for removing pollutants from wastewater systems. The coupling of metal oxides increases the efficiency of the process, thanks to their ability to absorb broad spectrum light, operate quickly, and exhibit natural p-n characteristics. In this study, binary and ternary nanocomposites of Copper Oxide/Zinc Oxide (CuO/ZnO) and beta cyclodextrin (beta-CD) were prepared using the sol-gel method. The synthesized materials were characterized using various techniques, and their photocatalytic performance was tested using model textile dyes. The addition of beta-CD improved the efficiency of the catalyst and reduced electron hole recombination. The beta-CD-CuO/ZnO nanocomposite exhibited superior photocatalytic activity compared to CuO/ZnO, with degradation efficiencies of up to 89.15% and 79.90% for MB and MG dyes, respectively, after 180 minutes of irradiation.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Liyun Yan, Jiahui Tang, Qing-an Qiao, Honglan Cai, Yuqi Dong, Juan Jin, Yanbin Xu, Hongwei Gao
Summary: A series of Bi2MoO6/ZnO composite photocatalysts with different mass ratios were prepared using the hydrothermal method and characterized by various analysis techniques. The Bi2MoO6/ZnO composite catalyst exhibited twice the degradation rate constant compared to traditional ZnO photocatalysis. The composite catalyst also showed stable performance after multiple runs. The high photocatalytic activity of Bi2MoO6/ZnO was attributed to efficient electron transport and reduced carrier recombination near the heterojunction. The Bi2MoO6/ZnO nanocomposites have potential applications in photodegradation.
Article
Engineering, Electrical & Electronic
Mansour Mohamed, Mohamed Jayiz, Abdullah S. Alshammari, A. Sedky, Z. R. Khan
Summary: In this study, the structural, morphological, optical, and photocatalytic properties of different Mn3O4/ZnO, CuO/ZnO, and Fe2O3/ZnO nanocomposites were compared. XRD and SEM analysis confirmed the nanostructure nature of the studied composites. The nanocrystalline ZnO, M3O4, CuO, and Fe2O3 phases with different crystalline structures were observed. The morphology of ZnO-based nanocomposites depended on the metal oxide added. Furthermore, the nanocomposites exhibited different optical properties and the Fe2O3/ZnO nanocomposites showed the highest photocatalytic activity for water purification.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Physical
C. Mrabet, R. Jaballah, N. Mahdhi, A. Boukhachem, M. Amlouk
Summary: The formation of heterojunctions is commonly used to enhance photocatalytic efficiency. In this study, the photocatalytic activity of CuO-ZnO nanocomposite thin films was investigated and found to be greater than that of individual semiconductors. The produced nanocomposite thin films might be beneficial for environmentally friendly and energy-saving wastewater treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
S. Vijayalakshmi, E. Kumar, M. Ganeshbabu, P. Sundara Venkatesh, K. Rathnakumar
Summary: The organic-inorganic polyaniline (PANI)/ZnO nanocomposite was synthesized with different weight percentages of ZnO, and the PANI/ZnO (10 wt%) composition showed excellent conductivity and maximum photocatalytic activity for the degradation of methylene blue under natural sunlight. The synergistic interaction between PANI and ZnO, as well as high photogenerated charge carrier separation, are believed to contribute to the superior performance of PANI/ZnO (10 wt%) nanocomposites.
Article
Environmental Sciences
Mohamad S. AlSalhi, Sandhanasamy Devanesan, Nassar N. Asemi, Majdoleen Aldawsari
Summary: In this study, efficient SnO2/CuO/rGO nanocomposites were synthesized for the degradation of reactive dyes. The nanocomposites exhibited high degradation efficiency for Rhodamine B and Reactive Red 120 dyes due to the generation of OH radicals. Additionally, the nanocomposites showed good antibacterial activity against several bacterial strains. Therefore, SnO2/CuO/rGO nanocomposites have great potential as photocatalysts and antibacterial agents.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Ayman A. Ali, Ezzat A. El Fadaly, Nasrallah M. Deraz
Summary: CuO/ZnO/MgO nanocomposites with various amounts of CuO were synthesized and characterized through different techniques after calcination, showing diverse degradation effects in photocatalytic activity experiments.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Huanhuan Xu, Peizhi Fan, Lan Xu
Summary: In this study, CuO/ZnO/carbon quantum dots (CQDs)@PAN nanocomposites with ternary heterostructures (CZC@PAN) were prepared and their application in degrading methylene blue (MB) was investigated. The synergistic effects of components in ternary heterostructures on the morphology, structure, and photocatalytic performance of CZC@PAN were analyzed, and their photocatalytic mechanism was discussed. The results showed that CZC@PAN exhibited excellent photocatalytic degradation performance, with a degradation rate of 99.56% for MB under natural sunlight for 4 hours.
Article
Environmental Sciences
Bushra Fatima, Sharf Ilahi Siddiqui, Rabia Ahmad, Nguyen Thi Thuy Linh, Van Nam Thai
Summary: This paper introduces a novel mixed metal oxide nanocomposite CuO-ZnO-CdWO4, synthesized through a green route, displaying high potential for photocatalytic degradation of dyes. Multiple spectroscopic and microscopic techniques were used to characterize the prepared nanocomposite, and its performance was evaluated using significant parameters such as quantum yield and turnover number. The results showed that CuO-ZnO-CdWO4 has a band gap of 3.13 eV and significantly higher removal efficiency under sunlight compared to artificial visible light, making it a promising candidate for wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
