Efficient photocatalytic elimination of antibiotics over metal-free CNx/PANI/graphene sponge system

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2024-11-29 DOI:10.1016/j.solidstatesciences.2024.107781

Beibei Zhu , Jie Zhou , Lubin Ni , Guowang Diao

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引用次数: 0

Abstract

Purification of antibiotic wastewater has been recognized as one of the most important issues in the environmental community, for which, developing the metal-free photocatalyst system is an environment-friendly and economic-feasible way. Herein, we designed the metal-free C₃N_x/PANI photocatalyst wrapped around the graphene sponge (CPG) for coupled antibiotic wastewater adsorption and purification. The properties of CPG and their relation with purification performance were investigated using various characterization techniques and photocatalysis evaluation. As a result, we found that the advanced porous structure of graphene sponge can favor wastewater adsorption and photon utilization efficiency due to the crosslink channels with a higher crosslinking density. Meanwhile, the layered structure of CN_x effectively facilitates the transfer of charge carriers while the PANI exhibits high-capacity visible light adsorption. Consequently, after optimization, CPG8 exhibited better photocatalytic activity with a sulfamethazine degradability of 10 mg/L within 40 min. The novel approach and new insights obtained in this work give important guidance for designing advanced photocatalytic systems used in wastewater purification.

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无金属CNx/聚苯胺/石墨烯海绵系统的高效光催化消除抗生素

抗生素废水的净化已成为环保界公认的重要问题之一，开发无金属光催化剂体系是一种既环保又经济可行的方法。本文设计了一种包裹在石墨烯海绵（CPG）表面的无金属C3Nx/PANI光催化剂，用于抗生素废水的耦合吸附和净化。利用各种表征技术和光催化评价研究了CPG的性质及其与净化性能的关系。因此，我们发现石墨烯海绵的先进多孔结构由于具有更高交联密度的交联通道，有利于废水吸附和光子利用效率。同时，CNx的层状结构有效地促进了载流子的转移，而PANI则表现出高容量的可见光吸附。因此，优化后的CPG8表现出更好的光催化活性，在40 min内磺胺乙胺的降解率为10 mg/L。本研究获得的新方法和新见解为设计用于废水净化的先进光催化系统提供了重要指导。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.