Chitin-cl-poly (acrylamide-co-guar gum) – Nickel oxide-Zirconium phosphate nanocomposite hydrogel as miniature adsorptional-photocatalysts units for removal of Tetracycline

IF 5.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications Pub Date : 2025-10-01 DOI:10.1016/j.inoche.2025.115614

Yaksha Verma , Pooja Dhiman , Tongtong Wang , Alberto García-Peñas , Chin Wei Lai , Genene Tessema Mola , Gaurav Sharma

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引用次数: 0

Abstract

This study introduces the development and evaluation of a novel Chitin-cl-poly (acrylamide-co-guar gum)-Nickel oxide-Zirconium phosphate nanocomposite hydrogel (Ch-cl-poly (AA-co-GG)-NZHC) for efficient removal of tetracycline from wastewater through combined adsorptional-photocatalytic processes. The synthesis of NiO, NiO-ZrP composite, and the hydrogel composite was carefully optimized, and structural analyses using XRD, FTIR, XPS, FE-SEM, and TEM confirmed their successful formation and morphological features. The Ch-cl-poly (AA-co-GG)-NZHC demonstrated exceptional tetracycline removal efficiency, achieving 41.84 % through adsorption, 86.64 % through adsorption followed by photocatalysis, and an impressive 94.89 % through adsorptional-photocatalysis. Kinetic studies revealed pseudo-first-order degradation behavior with a maximum rate constant of 0.0339 min⁻¹ for the nanocomposite hydrogel. Optimal removal efficiency was achieved at a tetracycline concentration of 10 ppm, catalyst dosage of 40 mg, and pH 9–12. Radical participation was confirmed via scavenging-based experiments, hydroxyl (OH^•) and superoxide (^•O₂⁻) radicals served as dominant factor in degradation process. LC-MS analysis identified multiple degradation pathways, involving dehydroxylation, decarboxylation, and ring-opening reactions, leading to complete mineralization into CO₂ and H₂O. Reusability studies demonstrated the hydrogel's stability, maintaining 75.19 % efficiency after five cycles. The neutral surface charge of the composite at pH 9 favoured tetracycline adsorption and subsequent photocatalytic degradation. These findings highlight the synergistic interaction of hydrogel components and nanomaterials, making the Ch-cl-poly (AA-co-GG)-NZHC a promising candidate for sustainable wastewater treatment and environmental remediation applications, particularly in addressing pharmaceutical contamination in water sources.

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几丁质-聚（丙烯酰胺-共瓜尔胶）-氧化镍-磷酸锆纳米复合水凝胶作为微型吸附光催化剂单元去除四环素

本研究介绍了一种新型甲壳素-聚（丙烯酰胺-共瓜尔胶）-氧化镍-磷酸锆纳米复合水凝胶（Ch-cl-poly (AA-co-GG)-NZHC）的开发和评价，该凝胶通过吸附-光催化联合工艺高效去除废水中的四环素。对NiO、NiO- zrp复合材料和水凝胶复合材料的合成进行了精心的优化，并通过XRD、FTIR、XPS、FE-SEM和TEM进行了结构分析，证实了它们的成功形成和形态特征。Ch-cl-poly (AA-co-GG)-NZHC对四环素的去除率为41.84%，吸附后光催化为86.64%，吸附-光催化为94.89%。动力学研究表明，纳米复合水凝胶具有伪一级降解行为，最大速率常数为0.0339 min−1。在四环素浓度为10 ppm、催化剂用量为40 mg、pH为9 ~ 12的条件下，脱除效果最佳。通过清除实验证实了自由基的参与，羟基（OH•）和超氧化物（•O2−）自由基在降解过程中起主导作用。LC-MS分析发现了多种降解途径，包括脱羟基、脱羧和开环反应，导致完全矿化成CO2和H2O。重复使用研究表明，水凝胶的稳定性，在5次循环后保持75.19%的效率。在pH为9时，复合材料的中性表面电荷有利于四环素的吸附和随后的光催化降解。这些发现强调了水凝胶组分和纳米材料的协同相互作用，使Ch-cl-poly (AA-co-GG)-NZHC成为可持续废水处理和环境修复应用的有希望的候选材料，特别是在解决水源中的药物污染方面。

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来源期刊

Inorganic Chemistry Communications 化学-无机化学与核化学

CiteScore

5.50

自引率

7.90%

发文量

1013

审稿时长

53 days

期刊介绍： Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.