使用不同降解度的氧化石墨烯去除甲蓝染料的无金属吸附和光降解方法
Sanju Mahich1, Yogesh Kumar Saini1, Vijay Devra2
1Department of Physics, University of Rajasthan, Jaipur, Rajasthan, 302004, India.
石墨烯氧化物 (GO) 有效吸附 97% 的甲蓝染料. 在150°C合成的降解石墨烯氧化物 (rGO) 显示47.58%的光催化降解,突出了它们在去除污染物方面的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 纳米技术纳米技术
背景情况:
- 工业有机污染物和染料对环境和健康构成重大风险.
- 石墨烯氧化物 (GO) 和其减少形式 (rGO) 正在探索用于污染物修复.
- 有效的染料去除方法对于环境保护至关重要.
研究的目的:
- 为了合成和描述GO和rGO.
- 为了研究GO和rGO的吸附和光催化降解能力,用于甲蓝色染料.
- 评估热减温温度对rGO性能和性能的影响.
主要方法:
- 石墨烯氧化物 (GO) 通过改进的汉默方法合成.
- 在真空下,在各种温度 (125-200°C) 下将GO热降解.
- 使用XRD,拉曼,FTIR,UV-Vis光谱,BET和BJH方法进行表征.
- 使用甲蓝色染料进行吸附和光催化降解实验.
主要成果:
- XRD显示了峰值转移和消失与减少,表明结构变化.
- 拉曼光谱显示,ID/IG比率从0.94降至0.76,这意味着缺陷减少.
- 紫外线-Vis光谱测量显示带隙从2.31 eV (GO) 减少到0.73 eV (rGO).
- 对于rGO-150.0,BET表面积从6.61增加到7.86m2/g,孔积从0.118增加到0.128cc/g.
- 在4小时内,GO实现了97%的甲蓝吸附;rGO-150在可见光下显示了47.58%的光催化降解.
结论:
- 热还原显著改变了GO的结构和电子特性.
- 减少的石墨烯氧化物 (rGO),特别是rGO-150,显示出对染料降解的希望.
- GO和rGO提出了可行的解决方案,用于从废水中去除有机污染物.
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