<b>Tuning ZnO Photocatalysts via C and Ce Co-Doping: A Comparative Approach Using Hydrothermal and Microwave Synthesis</b>

<br><br><br>In this study, C- and Ce-doped ZnO materials were synthesized by two methods: hydrothermal method (CCZ-HT) and microwave method (CCZ-MA), both using the same starting materials. The different heating stages of the methods produce distinct morphologies, doping concentrations, and some other characteristics. CCZ-HT consists of nanoellipsoids, while CCZ-MA consists of nanoflakes. The doping concentrations of cerium and carbon in CCZ-MA are higher than those in CCZ-HT. The types of crystal defects in the doped materials are different, leading to differences in their absorption and emission properties. The band gap energy of CCZ-MA is 2.85 eV, which is lower than that of CCZ-HT (2.92 eV). While CCZ-HT does not exhibit near-infrared emissions, CCZ-MA exhibits relatively strong emissions. CCZ-HT and CCZ-MA had a degradation capacity for ofloxacin (Ofx) under visible light that was 2.63 and 3.38 times superior to that of pure ZnO, respectively. The addition of Ce and C improved the band structure by slightly moving the conduction band and reducing the band gap, which allowed for better light absorption in the visible range and helped separate charge carriers. These enhancements immediately facilitated enhanced photocatalytic efficacy in the breakdown of ofloxacin. The CCZ-MA material exhibited superior photocatalytic activity due to its advantageous shape, increased surface area, and enhanced charge trapping capability associated with flaws. The functions of photo oxidized fragments and reaction intermediates were also examined. This study postulated a photodegradation mechanism for Ofx.<br><br>

本研究采用两种方法合成了碳（C）与铈（Ce）共掺杂氧化锌（ZnO）材料：水热法（CCZ-HT）与微波法（CCZ-MA），两种方法均使用相同的起始原料。两种方法不同的加热工艺阶段，使得产物呈现出迥异的形貌、掺杂浓度及其他特性。CCZ-HT产物为纳米椭球，而CCZ-MA产物为纳米片。CCZ-MA中铈与碳的掺杂浓度高于CCZ-HT。两种掺杂材料的晶体缺陷类型存在差异，进而导致其吸光与发光特性有所不同。CCZ-MA的带隙能量为2.85 eV，低于CCZ-HT的2.92 eV。CCZ-HT未表现出近红外发光特性，而CCZ-MA则呈现出较强的近红外发光。在可见光条件下，CCZ-HT与CCZ-MA对氧氟沙星（Ofx）的降解能力分别为纯氧化锌的2.63倍与3.38倍。铈与碳的掺杂通过微调导带位置、降低带隙，优化了材料的能带结构，使得其在可见光区间的吸光性能更佳，同时助力电荷载流子的有效分离。上述优化作用显著提升了材料对氧氟沙星的光催化降解效能。CCZ-MA之所以表现出更优异的光催化活性，得益于其更优的形貌、更大的比表面积，以及由缺陷带来的更强电荷捕获能力。本研究还对光氧化碎片与反应中间体的作用进行了探究，并提出了氧氟沙星的光降解机制。

搜集汇总

背景与挑战

背景概述

该数据集研究了通过碳和铈共掺杂氧化锌光催化剂，采用水热法和微波法两种合成方法。关键发现显示，微波法合成的材料具有更高的掺杂浓度、更低的带隙能量（2.85 eV）和更强的近红外发射，其光催化降解氧氟沙星的性能是纯氧化锌的3.38倍，优于水热法合成的材料（2.63倍）。