Bagheri Hanieh, Pasha Mohammad Akbarzadeh, Lakouraj Moslem Mansour, Hasantabar Vahid, Mohseni Mojtaba
Department of Solid-State Physics, Faculty of Basic Science, University of Mazandaran 47416-95447 Babolsar Iran
Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran Babolsar 47416-95447 Iran.
RSC Adv. 2022 May 26;12(25):15950-15972. doi: 10.1039/d2ra01810a. eCollection 2022 May 23.
This study reports the successful synthesis of a ZnS@GO@Pani polymeric nanocomposite (NC) chemical polymerization. The product was used for simultaneous photocatalytic degradation-adsorption of malachite green (MG), a carcinogenic and widely used dye. The physicochemical properties of the prepared NC were characterized by various techniques. Morphological and XRD results confirmed the fine size of ZnS nanoparticles (NPs) with an approximate mean size of 5 nm, uniformly distributed within the polymeric matrix. For comparative purposes, photocatalytic dye degradation-adsorption of this nanohybrid was explored both in the dark and under natural light. It was observed that 0.1 g of the ternary NC in MG aqueous solution (20 ppm) leads to dye adsorption within 15 minutes with an efficiency of 70% under dark conditions. Also, MG removal efficiency of up to 90% was achieved in 15 minutes under natural light owing to integrated photocatalytic degradation-adsorption mechanisms. Adsorption isotherm studies were performed considering Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich (D-R) models. The results showed that the Freundlich isotherm with = 0.988 is well consistent with the experimental data. Integrated photocatalytic degradation-adsorption kinetics were modeled with pseudo-first-order (PFO) and pseudo-second-order (PSO) models where PSO with = 0.999 best fitted the data, implying the predominant role of chemical adsorption in the dye removal process. Antibacterial tests revealed superior antibacterial activity of the prepared ZnS@GO@Pani NC against both Gram-negative and Gram-positive bacteria, demonstrating the remarkable synergistic effect of ZnS NPs embedded in the GO@Pani matrix. Accordingly, the prepared NC could be regarded as a promising candidate for wastewater treatment applications. The leaching and regeneration studies also confirmed that the prepared NC is a non-toxic dye removal agent with good reusability.
本研究报道了通过化学聚合成功合成了一种ZnS@GO@Pani聚合物纳米复合材料（NC）。该产物用于同时光催化降解-吸附孔雀石绿（MG），一种致癌且广泛使用的染料。通过各种技术对制备的NC的物理化学性质进行了表征。形态学和XRD结果证实了ZnS纳米颗粒（NPs）尺寸细小，平均尺寸约为5nm，均匀分布在聚合物基质中。为了进行比较，在黑暗和自然光下研究了这种纳米杂化物的光催化染料降解-吸附性能。观察到，在黑暗条件下，0.1g三元NC加入到MG水溶液（20ppm）中，15分钟内染料吸附效率达70%。此外，由于光催化降解-吸附机制的综合作用，在自然光下15分钟内MG去除效率高达90%。考虑了Langmuir、Freundlich、Temkin和Dubinin-Radushkevich（D-R）模型进行吸附等温线研究。结果表明，Freundlich等温线（n = 0.988）与实验数据吻合良好。采用伪一级（PFO）和伪二级（PSO）模型对光催化降解-吸附综合动力学进行建模，其中PSO（R² = 0.999）最符合数据，这意味着化学吸附在染料去除过程中起主要作用。抗菌测试表明，制备的ZnS@GO@Pani NC对革兰氏阴性菌和革兰氏阳性菌均具有优异的抗菌活性，证明了嵌入GO@Pani基质中的ZnS NPs具有显著的协同效应。因此，制备的NC可被视为废水处理应用的有前途的候选材料。浸出和再生研究还证实，制备的NC是一种无毒的染料去除剂，具有良好的可重复使用性。
