One-step synthesis of carbon nitride nanobelts for the enhanced photocatalytic degradation of organic pollutants through peroxydisulfate activation,Environmental Science: Nano

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One-step synthesis of carbon nitride nanobelts for the enhanced photocatalytic degradation of organic pollutants through peroxydisulfate activation
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-11-25 , DOI: 10.1039/d0en00985g
Xiaoshan Zheng _{1,

2,

3,

4} , Zhongquan Wang _{1,

2,

3,

4} , Tiansheng Chen _{1,

2,

3,

4} , Jie Ran _{1,

2,

3,

4} , Yuliang Wu _{1,

2,

3,

4} , Cuiwen Tan _{1,

2,

3,

4} , Qianxin Zhang _{4,

5,

6,

7} , Ping Chen _{1,

2,

3,

4} , Fengliang Wang _{3,

4,

8,

9,

10} , Haijin Liu _{4,

5,

11,

12,

13} , Wenying Lv _{1,

2,

3,

4} , Guoguang Liu _{1,

2,

3,

4}

Affiliation

The progress of high-efficiency photocatalysts and the suppression of photoinduced charge recombination remain the primary goals for practical applications. In this study, we demonstrate the convenient synthesis of graphite carbon nitride nanobelts (CNNB) for the enhanced photocatalytic degradation of organic contaminants through peroxydisulfate (PDS) activation. In operation, the PDS serves as an electron acceptor, whereas the organic pollutants acts as hole catchers, thus achieving an external dual transmission mechanism. Consequently, the CNNB/PDS system shows outstanding photocatalytic performance for the removal of sulfamethazine (SMT) under blue-LED light irradiation, which was ∼17- and ∼5 times more efficient than pristine g-C₃N₄/PDS and CNNB, respectively. Furthermore, a potential SMT degradation pathway was deduced based on the detection of degradation intermediates and theoretical calculations. Finally, reactions looking at several influencing factors indicated that the CNNB/PDS system could be used far more productively for the removal of SMT under ambient aqueous conditions. Hence, this synergistic external dual transmission mechanism process might serve as a promising technology for the removal of organic pollutants.

中文翻译：

一步法合成氮化碳纳米带，通过过二硫酸盐活化增强有机污染物的光催化降解

高效光催化剂的发展和光诱导电荷复合的抑制仍然是实际应用的主要目标。在这项研究中，我们证明了方便的合成石墨碳氮化物纳米带（CNNB）的方法是通过过氧二硫酸盐（PDS）活化来增强有机污染物的光催化降解。在操作中，PDS充当电子受体，而有机污染物充当空穴捕获器，从而实现了外部双重传输机制。因此，CNNB / PDS系统在蓝光LED照射下具有出色的光催化去除磺胺二甲嘧啶（SMT）的性能，其效率是原始gC ₃ N _4的约17和5倍。/ PDS和CNNB。此外，根据降解中间体的检测和理论计算推导了潜在的SMT降解途径。最后，观察几个影响因素的反应表明，在环境含水条件下，CNNB / PDS系统可以更有效地用于去除SMT。因此，这种协同的外部双重传播机制过程可以作为一种有前途的技术来去除有机污染物。

更新日期：2020-12-18

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