School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
Int J Biol Macromol. 2024 Jun;269(Pt 1):131866. doi: 10.1016/j.ijbiomac.2024.131866. Epub 2024 Apr 25.
The recent rise in textile dye wastewater discharge into the environment has detrimental effects on living organisms and human health. The present study reports a facile approach to green-synthesized AuNPs employing sesbania gum for catalytic and photocatalytic degradation of organic pollutants. The obtained AuNPs were characterized by various techniques such as UV-vis, FT-IR, SEM, TEM, AFM, zeta potential, LC-MS, and XPS. The XRD patterns revealed a highly crystalline and face-centered cubic structure. XPS and EDX analysis defined the chemical composition and product purity of SBG-AuNPs. Photocatalytic degradation of hazardous dyes congo red and safranin-O using SBG-AuNPs showed a rapid decomposition rate with 94.69 % under visible light irradiation. The effect of pH, dye concentration, and catalyst dose on photodegradation and recyclability was also studied. The kinetic plots were used to calculate the rate constant, showing a pseudo-first-order reaction. Scavenger trap experiments confirmed the role of h and superoxide(O) as active species, and LCMS analysis was used to identify the degradation intermediates. The catalytic reduction of SBG-AuNPs was studied for brilliant green (BG) and methylene blue (MB) in the presence of NaBH, resulting the degradation efficiency of 90.37 % and 84.52 %, respectively. This study presents an innovative approach for designing highly efficient photocatalysts for environmental remediation and wastewater treatment from textile dyes.
最近，纺织染料废水排放到环境中，对生物和人类健康造成了有害影响。本研究报告了一种简便的方法，使用田菁胶（Sesbania gum）绿色合成 AuNPs，用于催化和光催化降解有机污染物。所得到的 AuNPs 通过各种技术进行了表征，例如 UV-vis、FT-IR、SEM、TEM、AFM、zeta 电位、LC-MS 和 XPS。XRD 图谱显示出高度结晶的面心立方结构。XPS 和 EDX 分析定义了 SBG-AuNPs 的化学组成和产物纯度。使用 SBG-AuNPs 对危险染料刚果红和碱性品红进行光催化降解，在可见光照射下显示出 94.69%的快速分解率。还研究了 pH、染料浓度和催化剂剂量对光降解和可回收性的影响。动力学图用于计算速率常数，显示出准一级反应。猝灭剂捕获实验证实了 h 和超氧(O)作为活性物质的作用，并且使用 LCMS 分析鉴定了降解中间体。研究了 SBG-AuNPs 在 NaBH 存在下对亮绿（BG）和亚甲基蓝（MB）的催化还原，分别达到了 90.37%和 84.52%的降解效率。本研究提出了一种设计用于环境修复和纺织染料废水处理的高效光催化剂的创新方法。
