Ram Rishi, Kumar Sanjeev, Gupta Akanksha, Kumar Ravinder, Dubey Kashyap Kumar, Kumar Vinod
School of Physical Sciences, Jawaharlal Nehru University, New Delhi, India.
Department of Chemistry, SRM Institute of Science and Technology, Delhi-NCR Campus, Ghaziabad, India.
Front Bioeng Biotechnol. 2025 Apr 4;13:1458965. doi: 10.3389/fbioe.2025.1458965. eCollection 2025.
Pesticides such as isoproturon are widely employed and represent a considerable environmental concern. The development of sustainable and efficient degrading techniques is crucial. Photocatalytic degradation employing semiconductor materials is a compelling solution. This study examines the synergistic advantages of heterojunction formation by synthesizing, characterizing, and improving the photocatalytic efficacy of AgPO/SnO nanocomposites for the degradation of isoproturon.
The AgPO/SnO nanocomposite was characterised using powder X-ray diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Ultraviolet-Diffuse Reflectance Spectroscopy (UV-DRS) and X-ray Photoelectron Spectroscopy (XPS). The effective synthesis of the AgPO/SnO heterojunction was confirmed by characterization data from various techniques (PXRD, FTIR, SEM, UV-DRS, XPS).
Elemental mapping confirmed uniform distribution of O, P, Ag, and Sn. High-resolution mass spectrometry (HRMS) was employed to analyse degradation products. The AgPO/SnO nanocomposite exhibited improved photocatalytic degradation of isoproturon compared to its precursors. In contrast to 25% for pure SnO and 41% for AgPO, over 97% degradation was achieved using AgPO/SnO nanocomposite within 120 min of light irradiation under identical conditions. The synergistic effects of heterojunction formation significantly enhanced isoproturon degradation using the AgPO/SnO nanocomposite. The heterojunction reduces electron-hole recombination rate and enhances photogenerated charge carriers for degradation via effective charge separation. The improved photocatalytic activity is ascribed to the increased surface area of the nanocomposite. The analysis of HRMS data revealed the degradation products. The findings demonstrate the efficacy of AgPO/SnO nanocomposites as photocatalysts for environmental remediation, namely in the breakdown of pesticides.
异丙隆等农药被广泛使用，对环境构成了重大威胁。开发可持续且高效的降解技术至关重要。利用半导体材料进行光催化降解是一个极具吸引力的解决方案。本研究通过合成、表征和提高AgPO/SnO纳米复合材料对异丙隆的光催化降解效率，考察了异质结形成的协同优势。
采用粉末X射线衍射（PXRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、紫外-漫反射光谱（UV-DRS）和X射线光电子能谱（XPS）对AgPO/SnO纳米复合材料进行表征。通过各种技术（PXRD、FTIR、SEM、UV-DRS、XPS）的表征数据证实了AgPO/SnO异质结的有效合成。
元素映射证实了O、P、Ag和Sn的均匀分布。采用高分辨率质谱（HRMS）分析降解产物。与前驱体相比，AgPO/SnO纳米复合材料对异丙隆的光催化降解性能有所提高。在相同条件下，光照120分钟内，纯SnO的降解率为25%，AgPO为41%，而AgPO/SnO纳米复合材料的降解率超过97%。异质结形成的协同效应显著提高了AgPO/SnO纳米复合材料对异丙隆的降解效果。异质结降低了电子-空穴复合率，并通过有效的电荷分离增强了用于降解的光生载流子。光催化活性的提高归因于纳米复合材料表面积的增加。HRMS数据分析揭示了降解产物。研究结果证明了AgPO/SnO纳米复合材料作为光催化剂用于环境修复，即分解农药的有效性。
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