Basaleh A S, Shawky Ahmed, Mahmoud M H H
Department of Chemistry, Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah, 21589, Saudi Arabia.
Nanomaterials and Nanotechnology Department, Advanced Materials Division, Central Metallurgical R&D Institute (CMRDI), PO Box 87, Helwan, 11421, Cairo, Egypt.
Nanotechnology. 2022 Nov 4;34(3). doi: 10.1088/1361-6528/ac9a57.
The advancement in ceramic oxide-based photocatalysis has got much attention recently for environmental issues. Atrazine (AZ) is one of the major used herbicides in agricultural and related industries. This work familiarizes a polymeric-assisted sol-gel preparation of high surface area zirconium oxide (ZrO) supported with cadmium oxide nanoparticles at minor content (0.5-2.0 wt%). Exploration of the synthesized heterostructures revealed the enhancement of visible-light absorbance and reduction of bandgap energy to 2.76 eV keeping the same crystalline form and high surface area of 170 mg. The prepared photocatalysts were used to degrade AZ in water at a concentration of 231.8M (50 ppm). The 1.5%-introduced CdO to ZrOrevealed the best-performed photocatalyst for complete oxidation of AZ within 40 at an optimized dose of 1.6 g l. This novel ceramic photocatalyst showed a chemical and structural ability to keep 98.5% of its initial efficiency after five regenerated cycles. The construction of p-n heterojunction between the p-type ZrOand the n-type CdO contributed to the comprehensive photocatalytic competence toward the efficient charge separation and photooxidation process.
近年来，基于陶瓷氧化物的光催化技术因环境问题受到了广泛关注。阿特拉津（AZ）是农业及相关行业中主要使用的除草剂之一。这项工作介绍了一种聚合物辅助的溶胶 - 凝胶法，用于制备负载少量（0.5 - 2.0 wt%）氧化镉纳米颗粒的高比表面积氧化锆（ZrO）。对合成的异质结构的研究表明，其可见光吸收率提高，带隙能量降低至2.76 eV，同时保持相同的晶体形式和170 mg的高比表面积。制备的光催化剂用于降解水中浓度为231.8M（50 ppm）的AZ。向ZrO中引入1.5%的CdO，在1.6 g l的优化剂量下，该光催化剂在40分钟内对AZ的完全氧化表现最佳。这种新型陶瓷光催化剂在经过五次再生循环后，仍具有保持其初始效率98.5%的化学和结构能力。p型ZrO和n型CdO之间p - n异质结的构建有助于提高光催化能力，实现有效的电荷分离和光氧化过程。
