In situ synthesis of a photocatalyst using TiO2 QDs-immobilized functionalized galactomannan for degradation of organic pollutant

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-29 DOI:10.1016/j.jwpe.2024.106617

Padmapani Pradhan , Shaon Dey , Kalipada Manna , Asit Baran Panda , Sagar Pal

{"title":"In situ synthesis of a photocatalyst using TiO2 QDs-immobilized functionalized galactomannan for degradation of organic pollutant","authors":"Padmapani Pradhan , Shaon Dey , Kalipada Manna , Asit Baran Panda , Sagar Pal","doi":"10.1016/j.jwpe.2024.106617","DOIUrl":null,"url":null,"abstract":"<div><div>TiO2 based photocatalysts are highly efficient systems in degrading organic contaminants. In the present work, an in-situ approach has been adopted to synthesize TiO2 quantum dots (QDs) with simultaneous grafting of methacrylic acid (MAc) on guar gum (GG), to develop a hybrid composite (GG-g-PMAc-@-TiO2 QDs) for photocatalytic degradation of toxic organic contaminant. The in-situ synthesis and proper dispersion of TiO2 QDs over polymer surface is aided by the stabilization through electrostatic interaction and hydrogen bonding between the acid functionality of the grafted PMAc chains and TiO2 QDs. The structural and morphological properties of GG-g-PMAc-@-TiO2 QDs have been thoroughly investigated by various characterization techniques. The HR-TEM analysis reveals the average particle size of TiO2 QDs is ∼3.9 nm. The optical properties of the composite have been studied by UV, PL and TCSPC analyses. Moreover, the developed nanohybrid GG-g-PMAc-@-TiO2 QDs photocatalytically degrades ciprofloxacin (CIP) efficiently (∼94 % degraded within 3 h). The HR-MS analysis predicts the various degraded CIP fragments that have further been used to establish probable degradation mechanism.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106617"},"PeriodicalIF":6.3000,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S221471442401849X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

TiO₂ based photocatalysts are highly efficient systems in degrading organic contaminants. In the present work, an in-situ approach has been adopted to synthesize TiO₂ quantum dots (QDs) with simultaneous grafting of methacrylic acid (MAc) on guar gum (GG), to develop a hybrid composite (GG-g-PMAc-@-TiO₂ QDs) for photocatalytic degradation of toxic organic contaminant. The in-situ synthesis and proper dispersion of TiO₂ QDs over polymer surface is aided by the stabilization through electrostatic interaction and hydrogen bonding between the acid functionality of the grafted PMAc chains and TiO₂ QDs. The structural and morphological properties of GG-g-PMAc-@-TiO₂ QDs have been thoroughly investigated by various characterization techniques. The HR-TEM analysis reveals the average particle size of TiO₂ QDs is ∼3.9 nm. The optical properties of the composite have been studied by UV, PL and TCSPC analyses. Moreover, the developed nanohybrid GG-g-PMAc-@-TiO₂ QDs photocatalytically degrades ciprofloxacin (CIP) efficiently (∼94 % degraded within 3 h). The HR-MS analysis predicts the various degraded CIP fragments that have further been used to establish probable degradation mechanism.

Abstract Image

查看原文本刊更多论文

二氧化钛qds固定化半乳甘露聚糖原位合成降解有机污染物光催化剂

TiO2基光催化剂是降解有机污染物的高效体系。本文采用原位法在瓜尔胶（GG）上同时接枝甲基丙烯酸（MAc）合成TiO2量子点（QDs），制备了用于光催化降解有毒有机污染物的杂化复合材料（GG-g-PMAc-@-TiO2 QDs）。接枝的PMAc链与TiO2量子点之间的静电相互作用和氢键的稳定有助于TiO2量子点的原位合成和在聚合物表面的适当分散。利用各种表征技术对GG-g-PMAc-@-TiO2量子点的结构和形态特性进行了深入的研究。HR-TEM分析显示TiO2量子点的平均粒径为~ 3.9 nm。通过紫外、PL和TCSPC分析研究了复合材料的光学性质。此外，开发的纳米杂化GG-g-PMAc-@-TiO2量子点光催化降解环丙沙星（CIP）效率高（在3小时内降解约94%）。HR-MS分析预测了各种降解的CIP片段，并进一步用于建立可能的降解机制。

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

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies