rGO Blended PbS:Ag Nanoparticles for Rhodamine B Dye Degradation and Growth Inhibition of S. aureus and E. coli Bacterial Strains

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL Kinetics and Catalysis Pub Date : 2024-07-31 DOI:10.1134/s0023158423601262

C. Rajashree, A. R. Balu, S. Chitra Devi, C. Kayathiri, K. Devendran, M. Sriramraj, A. Vinith

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Abstract

Photocatalytic and antibacterial properties of PbS:Ag (PA) and rGO-blended PbS:Ag (rPA) nanoparticles (NPs) have been compared and reported in this paper. Chemical precipitation and one-pot synthesis methods were used to synthesize NPs of PA and rPA. X-ray diffraction (XRD) studies reveal a cubic crystal structure for both samples, with preferential growth along the (200) plane. Crystallite sizes were 55 and 41 nm for PA and rPA, respectively. Scanning electron microscopy (SEM) images of rPA revealed clustered grains. Both samples exhibited Pb–S bands in Fourier-transform infrared spectroscopy (FTIR) studies. Near band edge emissions occurred at 504, 520, 539 and 595 nm for both PA and rPA. The inclusion of rGO into PA led to lattice misfit, crystal growth disorders, and increased grain boundary scattering. This series of structural disruptions contributed to a reduction in the photoluminescence (PL) intensity for the rPA composite. A higher degradation efficiency of 95.4% was achieved for the rPA catalyst against Rhodamine B dye under visible light. The antibacterial activity of PA is increased with rGO inclusion due to increased generation of reactive oxygen species (ROS).

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用于罗丹明 B 染料降解和抑制金黄色葡萄球菌和大肠杆菌菌株生长的 rGO 掺杂 PbS:Ag 纳米粒子

摘要本文比较并报道了PbS:Ag（PA）和rGO-blended PbS:Ag（rPA）纳米粒子（NPs）的光催化和抗菌性能。本文采用化学沉淀法和一锅合成法合成了 PA 和 rPA 的 NPs。X 射线衍射 (XRD) 研究显示，两种样品均为立方晶体结构，且沿 (200) 平面优先生长。PA 和 rPA 的晶体尺寸分别为 55 纳米和 41 纳米。rPA 的扫描电子显微镜（SEM）图像显示出成团的晶粒。在傅立叶变换红外光谱（FTIR）研究中，两种样品都显示出 Pb-S 带。PA 和 rPA 的近带边缘发射波长分别为 504、520、539 和 595 nm。在 PA 中加入 rGO 会导致晶格错配、晶体生长紊乱和晶界散射增加。这一系列的结构破坏导致 rPA 复合材料的光致发光（PL）强度降低。在可见光下，rPA 催化剂对罗丹明 B 染料的降解效率高达 95.4%。由于活性氧（ROS）的生成增加，加入 rGO 后 PA 的抗菌活性提高。

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来源期刊

Kinetics and Catalysis 化学-物理化学

CiteScore

2.10

自引率

27.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.