利用水相叶提取物生物合成具有催化活性的新型铂钯双金属纳米颗粒。
Biogenic synthesis of novel platinum-palladium bimetallic nanoparticles from aqueous leaf extract for catalytic activity.
作者信息
Velidandi Aditya, Sarvepalli Mounika, Pabbathi Ninian Prem Prashanth, Baadhe Rama Raju
机构信息
Department of Biotechnology, National Institute of Technology, Warangal, 506004 Telangana India.
出版信息
3 Biotech. 2021 Aug;11(8):385. doi: 10.1007/s13205-021-02935-0. Epub 2021 Jul 27.
UNLABELLED
This work reports the fast and effective bio-fabrication of novel platinum-palladium bimetallic nanoparticles (Pt-Pd BNPs) along with their counterparts Pt and Pd monometallic NPs (MNPs) through aqueous leaf extract. The bio-fabrication of the NPs was achieved within 2 h at 100 °C and pH 7 which was established by the occurrence of dark brown color for Pt MNPs and black color for Pd MNPs and Pt-Pd BNPs. NPs were evaluated for their catalytic activity in the reduction of methyl orange (MO), rhodamine-B (rh-B), and methylene blue (MB) textile dyes in presence of sodium borohydride as a reducing agent. Pt-Pd (1:3) BNPs showed higher MO dye degradation (96.84 ± 2.05% in 50 min) followed by Pd MNPs (97.07 ± 1.46% in 60 min), Pt-Pd (3:1) BNPs (97.34 ± 1.17% in 70 min) and Pt-Pd (1:1) BNPs (98.12 ± 1.04% in 80 min). Pd MNPs showed significant catalytic activity in the reduction of rh-B dye by 97.27 ± 1.14% in 12 min followed by Pt-Pd (3:1) BNPs (96.76 ± 2.17% in 18 min), Pt-Pd (1:3) BNPs (96.53 ± 1.97% in 33 min) and Pt-Pd (1:1) BNPs (97.11 ± 2.09% in 39 min). Pt-Pd (1:3) BNPs also showed higher MB dye degradation (96.95 ± 1.57% in 40 min) followed by Pd MNPs (96.22 ± 2.36% in 55 min), Pt-Pd (3:1) BNPs (97.29 ± 1.22% in 75 min) and Pt-Pd (1:1) BNPs (96.45 ± 2.19% in 105 min). However, Pt MNPs showed no catalytic activity. Standard disc diffusion method was used to evaluate the NPs toxicity towards and , which showed no inhibitory zones. NPs showed less toxicity compared to potassium dichromate (control) against . Among the NPs studied, Pt-Pd (1:1) BNPs showed less toxicity with 100% mortality only at 100 µg/mL concentration followed by Pt MNPs (≥ 80 µg/mL), Pt-Pd (1:3) BNPs (≥ 60 µg/mL), Pt-Pd (3:1) BNPs (≥ 60 µg/mL) and Pd MNPs (≥ 40 µg/mL) after 72 h exposure. These evaluations support the application of bio-fabricated Pt-Pd BNPs as nano-catalysts in textile dyes degradation.
SUPPLEMENTARY INFORMATION
The online version contains supplementary material available at 10.1007/s13205-021-02935-0.
未标注
本研究报告了通过水相叶提取物快速有效地生物制备新型铂钯双金属纳米颗粒（Pt-Pd BNPs）及其对应物铂和钯单金属纳米颗粒（MNPs）。在100°C和pH 7条件下，2小时内实现了纳米颗粒的生物制备，这通过铂单金属纳米颗粒呈现深棕色、钯单金属纳米颗粒和铂钯双金属纳米颗粒呈现黑色得以证实。在以硼氢化钠作为还原剂的情况下，评估了纳米颗粒对甲基橙（MO）、罗丹明B（rh-B）和亚甲基蓝（MB）等纺织染料的催化还原活性。Pt-Pd（1:3）双金属纳米颗粒在50分钟内对MO染料的降解率较高（96.84±2.05%），其次是钯单金属纳米颗粒（60分钟内为97.07±1.46%）、Pt-Pd（3:1）双金属纳米颗粒（70分钟内为97.34±1.17%）和Pt-Pd（1:1）双金属纳米颗粒（80分钟内为98.12±1.04%）。钯单金属纳米颗粒在12分钟内对rh-B染料的还原催化活性显著，降解率为97.27±1.14%，其次是Pt-Pd（3:1）双金属纳米颗粒（18分钟内为96.76±2.17%）、Pt-Pd（1:3）双金属纳米颗粒（33分钟内为96.53±1.97%）和Pt-Pd（1:1）双金属纳米颗粒（39分钟内为97.11±2.09%）。Pt-Pd（1:3）双金属纳米颗粒对MB染料的降解率也较高（40分钟内为96.95±1.57%），其次是钯单金属纳米颗粒（55分钟内为96.22±2.36%）、Pt-Pd（3:1）双金属纳米颗粒（75分钟内为97.29±1.22%）和Pt-Pd（1:1）双金属纳米颗粒（105分钟内为96.45±2.19%）。然而，铂单金属纳米颗粒没有催化活性。采用标准纸片扩散法评估纳米颗粒对[具体微生物1]和[具体微生物2]的毒性，结果显示没有抑菌圈。与重铬酸钾（对照）相比，纳米颗粒对[具体微生物3]的毒性较小。在所研究的纳米颗粒中，Pt-Pd（1:1）双金属纳米颗粒毒性较小，仅在浓度为100μg/mL时死亡率为100%，其次是铂单金属纳米颗粒（≥80μg/mL）、Pt-Pd（1:3）双金属纳米颗粒（≥60μg/mL）、Pt-Pd（3:1）双金属纳米颗粒（≥60μg/mL）和钯单金属纳米颗粒（≥40μg/mL），暴露72小时后呈现此结果。这些评估支持了生物制备的Pt-Pd双金属纳米颗粒作为纳米催化剂在纺织染料降解中的应用。
补充信息
在线版本包含可在10.1007/s13205-021-02935-0获取的补充材料。
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