Lei Xianlu, Li Shuang, Zeng Jian, Huang Meiqi, Ma Miaomiao, Ran Xueyan, Chen Xiang, Yin Yuting, Sun Qi, Le Tao
Chongqing Collaborative Innovation Center for Rapid Detection of Food Quality and Safety, Chongqing Key Laboratory of Conservation and Utilization of Freshwater Fishes, Animal Biology Key Laboratory of Chongqing Education Commission, Chongqing Normal University, Chongqing 401331, China.
Molecules. 2025 Jan 22;30(3):466. doi: 10.3390/molecules30030466.
Zinc oxide (ZnO) semiconductors are renowned for their cost-effective synthesis and superior catalytic attributes, making them prominent in environmental remediation applications. This study presents the synthesis of ZnO nanoparticles (NPs) with distinct morphologies, achieved by modulating citric acid concentrations in an ultrasonic-assisted hydrothermal process. The photocatalytic efficacy of these ZnO NPs in degrading malachite green (MG), a persistent environmental pollutant, was thoroughly investigated. Our findings reveal a strong correlation between the morphological features of ZnO catalysts and their photodegradation performance. Among the synthesized NPs, the chrysanthemum-shaped ZnO (denoted as USZ-0.1) demonstrated exceptional photocatalytic activity, attributed to its enhanced surface area and optimized nano-crystal aggregation. This structure facilitated the generation of a higher concentration of reactive oxygen species, leading to over 96.5% degradation of MG within 40 min under simulated sunlight in an acidic medium. This study underscores the potential of morphological manipulation in enhancing the photocatalytic properties of ZnO NPs for environmental applications.
氧化锌（ZnO）半导体因其具有成本效益的合成方法和卓越的催化特性而闻名，使其在环境修复应用中备受瞩目。本研究介绍了通过在超声辅助水热过程中调节柠檬酸浓度来合成具有不同形态的ZnO纳米颗粒（NPs）。对这些ZnO NPs降解孔雀石绿（MG，一种持久性环境污染物）的光催化效果进行了深入研究。我们的研究结果揭示了ZnO催化剂的形态特征与其光降解性能之间存在密切关联。在合成的NPs中，菊花状的ZnO（记为USZ - 0.1）表现出卓越的光催化活性，这归因于其增大的表面积和优化的纳米晶体聚集。这种结构促进了更高浓度活性氧物种的产生，导致在酸性介质中模拟阳光下40分钟内MG的降解率超过96.5%。本研究强调了形态调控在增强ZnO NPs用于环境应用的光催化性能方面的潜力。
