Faisal Mohd, Ahmed Jahir, Jalalah Mohammed, Alsareii Saeed A, Alsaiari Mabkhoot, Harraz Farid A
Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box 1988, Najran, 11001, Saudi Arabia.
Department of Chemistry, Faculty of Science and Arts, Najran University, Najran, 11001, Saudi Arabia.
Environ Sci Pollut Res Int. 2023 May;30(22):61710-61725. doi: 10.1007/s11356-023-26456-w. Epub 2023 Mar 18.
Appropriate material selection and proper understanding of bandgap modification are key factors for the development of efficient photocatalysts. Herein, we developed an efficient, well-organized visible light oriented photocatalyst based on g-CN in association with polymeric network of chitosan (CTSN) and platinum (Pt) nanoparticles utilizing a straightforward chemical approach. Modern techniques like XRD, XPS, TEM, FESEM, UV-Vis, and FTIR spectroscopy were exploited for characterization of synthesized materials. XRD results confirmed the involvement of α-polymorphic form of CTSN in graphitic carbon nitride. XPS investigation confirmed the establishment of trio photocatalytic structure among Pt, CTSN, and g-CN. TEM examination showed that the synthesized g-CN possesses fine fluffy sheets like structure (100 to 500 nm in size) intermingled with a dense layered framework of CTSN with good dispersion of Pt nanoparticles on g-CN and CTSN composite structure. The bandgap energies for g-CN, CTSN/g-CN, and Pt@ CTSN/g-CN photocatalysts were found to be 2.94, 2.73, and 2.72 eV, respectively. The photodegradation skills of each created structure have been examined on antibiotic gemifloxacin mesylate and methylene blue (MB) dye. The newly developed Pt@CTSN/g-CN ternary photocatalyst was found to be efficacious for the elimination of gemifloxacin mesylate (93.3%) in 25 min and MB (95.2%) just in 18 min under visible light. Designed Pt@CTSN/g-CN ternary photocatalytic framework exhibited ⁓ 2.20 times more effective than bare g-CN for the destruction of antibiotic drug. This study provides a simple route towards the designing of rapid, effective visible light oriented photocatalyts for the existing environmental issues.
合适的材料选择和对带隙修饰的正确理解是开发高效光催化剂的关键因素。在此，我们利用一种简单的化学方法，开发了一种基于g-CN与壳聚糖（CTSN）聚合物网络和铂（Pt）纳米颗粒相结合的高效、有序的可见光导向光催化剂。利用XRD、XPS、TEM、FESEM、UV-Vis和FTIR光谱等现代技术对合成材料进行了表征。XRD结果证实了CTSN的α-多晶型形式参与了石墨相氮化碳。XPS研究证实了Pt、CTSN和g-CN之间形成了三元光催化结构。TEM检查表明，合成的g-CN具有精细的蓬松片状结构（尺寸为100至500nm），与CTSN的致密层状框架混合，Pt纳米颗粒在g-CN和CTSN复合结构上具有良好的分散性。发现g-CN、CTSN/g-CN和Pt@CTSN/g-CN光催化剂的带隙能量分别为2.94、2.73和2.72eV。已对抗生素甲磺酸吉米沙星和亚甲基蓝（MB）染料检测了每种生成结构的光降解能力。新开发的Pt@CTSN/g-CN三元光催化剂在可见光下25分钟内对甲磺酸吉米沙星的去除率为93.3%，在18分钟内对MB的去除率为95.2%。设计的Pt@CTSN/g-CN三元光催化框架对抗生素药物的破坏效果比裸g-CN高约2.20倍。这项研究为解决现有环境问题设计快速、有效的可见光导向光催化剂提供了一条简单途径。
