Room Temperature Capture of Hazardous Gases by Sustainable N-doped Graphene Aerogel

IF 5.1 2区环境科学与生态学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Environmental Science: Nano Pub Date : 2025-09-26 DOI:10.1039/d5en00660k

K. Sandeep Raju, Rajarshi Panigrahi, Kirti Sankhala, Kumud Malika Tripathi

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引用次数: 0

Abstract

The escalating release of anthropogenic volatile organic compounds (VOCs) and toxic gases (TGCs) have become a key environmental concern. The quest to address the complex capture challenges for VOCs/TGCs removal calls for innovative, advanced, highly efficient and sustainable materials. A straightforward, one-step, low-cost, sustainable and scalable technique was used for the synthesis of nitrogen-doped graphene aerogel (N-GA) from waste jaggery with 3D interconnected network, super-hydrophobicity, and high surface area. The efficiency of waste jaggery derived N-GA as multifunctional adsorbent for VOCs/TGCs under ambient conditions is investigated in both gaseous and liquid states in a reversible manner. The N-GA realizes the adsorption-based capture of diverse TGCs/VOCs such as dichloromethane (DCM), H2S, CS2, benzene and NH3 with adsorption capacity over 1226, 1002.07, 885.58 mg g-1, 792.9, 489.4 mg g-1, respectively with high regeneration capability over 10 cycles. The feasibility of N-GA for organics removal in aqueous medium has also been tested for diverse organic solvents. That is relevant for direct application in indoor/outdoor air purification technologies, water remediation and ecosystem protection.

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可持续n掺杂石墨烯气凝胶室温捕集有害气体的研究

人为挥发性有机化合物（VOCs）和有毒气体（TGCs）的不断释放已成为一个关键的环境问题。为了解决VOCs/TGCs去除的复杂捕获挑战，需要创新、先进、高效和可持续的材料。采用一种简单、一步、低成本、可持续和可扩展的技术，从废渣中合成氮掺杂石墨烯气凝胶（N-GA），该技术具有三维互联网络、超疏水性和高表面积。在气态和液态可逆条件下，研究了废杂渣衍生N-GA作为环境条件下VOCs/TGCs的多功能吸附剂的效率。N-GA实现了对二氯甲烷（DCM）、H2S、CS2、苯和NH3等多种TGCs/VOCs的吸附捕集，吸附量分别为1226、1002.07、885.58 mg g-1、792.9、489.4 mg g-1，在10次循环中具有较高的再生能力。N-GA去除水中有机物的可行性也在不同的有机溶剂中进行了测试。这与室内/室外空气净化技术、水修复和生态系统保护的直接应用有关。

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来源期刊

Environmental Science: Nano CHEMISTRY, MULTIDISCIPLINARY-ENVIRONMENTAL SCIENCES

CiteScore

12.20

自引率

5.50%

发文量

290

审稿时长

2.1 months

期刊介绍： Environmental Science: Nano serves as a comprehensive and high-impact peer-reviewed source of information on the design and demonstration of engineered nanomaterials for environment-based applications. It also covers the interactions between engineered, natural, and incidental nanomaterials with biological and environmental systems. This scope includes, but is not limited to, the following topic areas: Novel nanomaterial-based applications for water, air, soil, food, and energy sustainability Nanomaterial interactions with biological systems and nanotoxicology Environmental fate, reactivity, and transformations of nanoscale materials Nanoscale processes in the environment Sustainable nanotechnology including rational nanomaterial design, life cycle assessment, risk/benefit analysis