Mesoporous tubular g-C3N4 as an efficient metal-free photocatalyst with peroxymonosulfate to degrade carbamazepine

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL Journal of hazardous materials letters Pub Date : 2023-07-29 DOI:10.1016/j.hazl.2023.100081
Yanchun Huang , Lingxiao Yang , Weifang Huang , Jun Li , Chao Liu , Bo Lai , Naiwen Li
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引用次数: 1

Abstract

In advanced oxidation processes with metal-containing catalysts, metal dissolution usually leads to reduced efficiency and biotoxicity. Therefore, it is very important to find efficient non-metallic materials. In this work, a metal-free mesoporous tubular g-C3N4 was fabricated using melamine and urea mixed according to the mass ratios of 1:12 (TPCN12) by a facile one-step thermal polymerization method. Mesoporous tubular TPCN12 was proved to be successfully synthesized by scanning electron microscope (SEM) and X-ray diffraction (XRD). Then the degradation of carbamazepine (CBZ) by activating peroxymonosulfate (PMS) of TPCN12 under visible light was investigated. It was found that degradation rate constant of CBZ in TPCN12/Vis/PMS system (0.0939 min−1) exhibited great superiority over that in TPCN12/Vis system (0.0149 min−1) and in TPCN12/PMS system, which indicated TPCN12, Vis and PMS had a synergistic effect. The dominant role of the electron transfer and the primary contribution of the holes (h+) and •O2 reactive species were revealed in TPCN12/Vis/ PMS system. Furthermore, the system showed sufficient advantages over a wide pH range and high resistance to inorganic anions. In general, the TPCN12/Vis/PMS system was capable of high stability and recyclability. This metal-free mesoporous tubular catalyst was proposed to achieve efficient and green elimination of pharmaceutical organic pollutants.

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介孔管状g-C3N4与过氧单硫酸盐降解卡马西平的高效无金属光催化剂
在含金属催化剂的高级氧化过程中,金属溶解通常会导致效率降低和生物毒性。因此,寻找高效的非金属材料是非常重要的。本研究以三聚氰胺和尿素按1:12的质量比(TPCN12)为原料,采用简单的一步热聚合法制备了无金属介孔管状g-C3N4。通过扫描电子显微镜(SEM)和x射线衍射仪(XRD)证实了介孔管状TPCN12的成功合成。研究了TPCN12活化过氧单硫酸盐(PMS)在可见光下对卡马西平(CBZ)的降解作用。结果表明,CBZ在TPCN12/Vis/PMS体系中的降解速率常数(0.0939 min−1)明显优于TPCN12/Vis体系和TPCN12/PMS体系中的降解速率常数(0.0149 min−1),表明TPCN12、Vis和PMS具有协同效应。在TPCN12/Vis/ PMS体系中,电子转移起主导作用,空穴(h+)和•O2−反应物质起主要作用。此外,该体系在较宽的pH范围和对无机阴离子的高抗性方面表现出足够的优势。总体而言,TPCN12/Vis/PMS体系具有较高的稳定性和可回收性。该无金属介孔管状催化剂是为实现高效、绿色去除医药类有机污染物而提出的。
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来源期刊
Journal of hazardous materials letters
Journal of hazardous materials letters Pollution, Health, Toxicology and Mutagenesis, Environmental Chemistry, Waste Management and Disposal, Environmental Engineering
CiteScore
10.30
自引率
0.00%
发文量
0
审稿时长
20 days
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