Rice Straw-Derived Activated Carbon/PNIPAM Nanocomposite Hydrogel for Efficient Adsorptive Removal of Synthetic Dyes

IF 2.6 4区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ChemNanoMat Pub Date : 2025-07-09 DOI:10.1002/cnma.202500237

Onkar Nath, Amul Jain, Koushik Mahata, Sanjib Banerjee

{"title":"Rice Straw-Derived Activated Carbon/PNIPAM Nanocomposite Hydrogel for Efficient Adsorptive Removal of Synthetic Dyes","authors":"Onkar Nath, Amul Jain, Koushik Mahata, Sanjib Banerjee","doi":"10.1002/cnma.202500237","DOIUrl":null,"url":null,"abstract":"<p>The persistent discharge of synthetic dyes into water bodies presents a critical environmental challenge due to their toxicity, nonbiodegradability, and persistent pollution. This study explores an eco-friendly approach to dye remediation using a nanocomposite hydrogel synthesized from rice straw-derived activated carbon (AC) embedded within a poly(N-isopropylacrylamide) (PNIPAM) matrix. Rice straw, an abundant agricultural waste, is converted into AC through pyrolysis followed by KOH activation, yielding a porous, graphitic-like structure with high surface functionality and characterized using FT-IR, powder X-ray diffraction analysis, Raman spectroscopy, FESEM, and HRTEM. The PNIPAM/AC nanocomposite hydrogel is synthesized via free-radical polymerization. The nanocomposite demonstrates high adsorption efficiency for congo red (anionic) is 94% and for rhodamine B (cationic) it is 71%, attributed to strong π–π interactions, electrostatic attraction, and enhanced diffusion through the hydrogel network. The material is a sustainable and cost-effective solution for industrial wastewater treatment.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 10","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemNanoMat","FirstCategoryId":"88","ListUrlMain":"https://aces.onlinelibrary.wiley.com/doi/10.1002/cnma.202500237","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The persistent discharge of synthetic dyes into water bodies presents a critical environmental challenge due to their toxicity, nonbiodegradability, and persistent pollution. This study explores an eco-friendly approach to dye remediation using a nanocomposite hydrogel synthesized from rice straw-derived activated carbon (AC) embedded within a poly(N-isopropylacrylamide) (PNIPAM) matrix. Rice straw, an abundant agricultural waste, is converted into AC through pyrolysis followed by KOH activation, yielding a porous, graphitic-like structure with high surface functionality and characterized using FT-IR, powder X-ray diffraction analysis, Raman spectroscopy, FESEM, and HRTEM. The PNIPAM/AC nanocomposite hydrogel is synthesized via free-radical polymerization. The nanocomposite demonstrates high adsorption efficiency for congo red (anionic) is 94% and for rhodamine B (cationic) it is 71%, attributed to strong π–π interactions, electrostatic attraction, and enhanced diffusion through the hydrogel network. The material is a sustainable and cost-effective solution for industrial wastewater treatment.

Abstract Image

查看原文本刊更多论文

稻秆源活性炭/PNIPAM纳米复合水凝胶高效吸附去除合成染料

合成染料由于其毒性、不可生物降解性和持久性污染而持续排放到水体中，对环境构成了严峻的挑战。本研究探索了一种生态友好的染料修复方法，该方法使用嵌入聚n -异丙基丙烯酰胺（PNIPAM）基质的稻秆衍生活性炭（AC）合成的纳米复合水凝胶。稻秆是一种丰富的农业废弃物，通过热解和KOH活化转化为AC，得到具有高表面功能的多孔石墨状结构，并使用FT-IR，粉末x射线衍射分析，拉曼光谱，FESEM和HRTEM进行了表征。采用自由基聚合法制备了PNIPAM/AC纳米复合水凝胶。纳米复合材料对刚果红（阴离子）的吸附效率为94%，对罗丹明B（阳离子）的吸附效率为71%，这归功于强π -π相互作用、静电吸引和通过水凝胶网络的增强扩散。该材料是一种可持续的、经济高效的工业废水处理解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ChemNanoMat Energy-Energy Engineering and Power Technology

CiteScore

6.10

自引率

2.60%

发文量

236

期刊介绍： ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.