Construction of Te-ZnO@S-g-C3N4 Heterojunction Nanocomposites for the Efficient Removal of Methylene Blue, Antifungal Activity, and Adsorption of Cr(VI) Ion

Adsorption Science & Technology Pub Date : 2023-05-26 DOI:10.1155/2023/6736182

Komal Aroosh, M. Javed, Nadia Hussain, Ahmad Alhujaily, S. Iqbal, M. Alotaibi, M. Faizan, Muhammad Shuaib Khan, A. Bahadur, M. A. Qayyum, N. Awwad, Y. Jazaa, F. F. Al-Fawzan, E. Elkaeed

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引用次数: 3

Abstract

Heterojunctions have proven to be effective catalysts for removing organic pollutants and heavy metals from wastewater. The following study is also about the formation of 2D heterojunction tellurium-doped zinc oxide composite with sulfur-doped graphitic carbon nitride (Te-ZnO@S-g-C3N4) by adopting a low-cost, simple, and ecofriendly coprecipitation technique. Thiourea was calcined to prepare S-g-C3N4 using the thermal degradation method. The characterization of synthesized photocatalysts was carried out by using SEM-EDX, FTIR, and XRD. The results obtained showed that the incorporation of tellurium caused an alteration in the wurtzite structure of ZnO. SEM-EDX analysis validated the purity of the synthesized samples due to the absence of any additional peaks. The decrease in the bandgap was also noted by the formation of composites. Using methylene blue as a reference dye, the UV-vis spectrophotometer was utilized to calculate the absorbance for photocatalytic degradation behavior. As a result of tellurium doping into the ZnO lattice, photocatalytic oxidation/reduction was improved, according to the results. 3Te-ZnO NPs showed the best degradation rate among dopant series, while an excellent overall degradation rate was noted by fabricated composite 3Te-ZnO@40S-g-C3N4. The best doped ZnO and composites were also used as sorbents for the abstraction of heavy metal (Cr(VI)) from water via adsorption. A definite rise in the removal efficiency percentage of chromium ions was observed by using these sorbents. The overall photo degradation rate and adsorption behavior noted were in ZnO

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Te-ZnO@S-g-C3N4异质结纳米复合材料高效去除亚甲基蓝、抗真菌活性和吸附Cr(VI)离子的构建

异质结已被证明是去除废水中有机污染物和重金属的有效催化剂。接下来的研究也是采用低成本、简单、环保的共沉淀法，与掺硫石墨氮化碳(Te-ZnO@S-g-C3N4)形成二维异质结掺碲氧化锌复合材料。采用热降解法煅烧硫脲制备S-g-C3N4。利用SEM-EDX、FTIR和XRD对合成的光催化剂进行了表征。结果表明，碲的掺入使ZnO的纤锌矿结构发生了变化。SEM-EDX分析验证了合成样品的纯度，因为没有任何额外的峰。复合材料的形成也表明了带隙的减小。以亚甲基蓝为对照染料，利用紫外-可见分光光度计计算光催化降解行为的吸光度。结果表明，由于碲掺杂在ZnO晶格中，光催化氧化/还原得到了改善。3Te-ZnO NPs在掺杂剂系列中表现出最好的降解率，而制备的复合材料3Te-ZnO@40S-g-C3N4具有优异的整体降解率。并将最佳掺杂ZnO及其复合材料作为吸附剂用于吸附水中重金属(Cr(VI))。使用这些吸附剂对铬离子的去除率有明显的提高。总的光降解率和吸附行为表现为ZnO

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Adsorption Science & Technology

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