Fabrication of a novel Z-scheme 2D/1D g-C3N4/polyaniline decorated on activated carbon with effective visible-light photocatalytic activity

IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Hadis Saraee , Marjan Tanzifi , Mohsen Mansouri , Mehdi Saraee , Mohammad Tavakkoli Yaraki
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Abstract

In recent years, visible-light driven photocatalysts present a significant role in different photocatalytic performances. Herein, a novel Z-scheme graphitic carbon nitride nanosheet/polyaniline nanowire (2D/1D CN/PAni) nanocomposite decorated on activated carbon (AC) support was synthesized by solution mixing combined with a calcination process for removal of CR dye under LED irradiation. The chemical, nanostructure, surface and optical properties of as-prepared nanocomposites were analyzed by different spectroscopic and microscopic techniques. The AC support had a fundamental role in modification of the surface area, preventing the CN/PAni accumulation and improving the separation of CN/PAni from the solution. The results of DRS and PL analyses displayed that the combining of CN nanosheet with PAni nanowire has an efficient role in the optical properties compared to pure CN. The effect of photo-reaction parameters such as CN/PAni loading on AC and CN/PAni/AC dosage on CR removal was examined. The CN/PAni/AC/light system presented effective degradation ability on CR, and the removal efficiency reached 91% after 100 min. The modified photocatalytic activity could be described by transferring photo-generated charges between 2D CN and 1D PAni via the Z-scheme mechanism. Furthermore, the CN/PAni decorated on AC support illustrated good recycling ability.

Abstract Image

在活性碳上装饰新型 Z 型 2D/1D g-C3N4/Polyaniline 以实现有效的可见光光催化活性
近年来,可见光驱动的光催化剂在不同的光催化性能中发挥着重要作用。在LED照射下,采用溶液混合与煅烧相结合的方法,合成了一种新型的以活性炭为载体装饰的Z-scheme石墨氮化碳纳米片/聚苯胺纳米线(2D/1D CN/PAni)纳米复合材料,用于去除CR染料。采用不同的光谱学和显微技术分析了制备的纳米复合材料的化学性质、纳米结构、表面和光学性质。AC载体对改变CN/PAni的表面积、防止CN/PAni的堆积和提高CN/PAni与溶液的分离具有根本性的作用。DRS和PL分析结果表明,与纯CN相比,CN纳米片与聚苯胺纳米线的结合对光学性能的影响更大。考察了CN/PAni/AC投加量和CN/PAni/AC投加量对CR去除率的影响。CN/PAni/ ac /光体系对CR具有良好的降解能力,100 min后的去除率达到91%。改性后的光催化活性可以通过Z-scheme机制在二维CN和一维PAni之间转移光生电荷来描述。此外,装饰在AC支架上的CN/PAni显示出良好的回收能力。
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来源期刊
Environmental Research
Environmental Research 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
12.60
自引率
8.40%
发文量
2480
审稿时长
4.7 months
期刊介绍: The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.
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