Ramos Rufus Mart Ceasar R, Regulacio Michelle D
Natural Sciences Research Institute, University of the Philippines Diliman, Quezon City 1101, Philippines.
Institute of Chemistry, University of the Philippines Diliman, Quezon City 1101, Philippines.
ACS Omega. 2021 Mar 9;6(11):7212-7228. doi: 10.1021/acsomega.1c00692. eCollection 2021 Mar 23.
Bimetallic nanostructures are emerging as a significant class of metal nanomaterials due to their exceptional properties that are useful in various areas of science and technology. When used for catalysis and sensing applications, bimetallic nanostructures have been noted to exhibit better performance relative to their monometallic counterparts owing to synergistic effects. Furthermore, their dual metal composition and configuration can be modulated to achieve optimal activity for the desired functions. However, as with other nanostructured metals, bimetallic nanostructures are usually prepared through wet chemical routes that involve the use of harsh reducing agents and hazardous stabilizing agents. In response to intensifying concerns over the toxicity of chemicals used in nanomaterial synthesis, the scientific community has increasingly turned its attention toward environmentally and biologically compatible reagents that can enable green and sustainable nanofabrication processes. This article aims to provide an evaluation of the green synthetic methods of constructing bimetallic nanostructures, with emphasis on the use of biogenic resources (e.g., plant extracts, DNA, proteins) as safe and practical reagents. Special attention is devoted to biogenic synthetic protocols that demonstrate controllable nanoscale features, such as size, composition, morphology, and configuration. The potential use of these biogenically prepared bimetallic nanostructures as catalysts and sensors is also discussed. It is hoped that this article will serve as a valuable reference on bimetallic nanostructures and will help fuel new ideas for the development of more eco-friendly strategies for the controllable synthesis of various types of nanostructured bimetallic systems.
双金属纳米结构作为一类重要的金属纳米材料正在兴起，这是由于它们具有卓越的性能，在科学技术的各个领域都很有用。当用于催化和传感应用时，由于协同效应，双金属纳米结构相对于其单金属对应物表现出更好的性能。此外，可以调节它们的双金属组成和构型，以实现所需功能的最佳活性。然而，与其他纳米结构金属一样，双金属纳米结构通常通过湿化学路线制备，这些路线涉及使用苛刻的还原剂和危险的稳定剂。鉴于对纳米材料合成中使用的化学品毒性的担忧日益加剧，科学界越来越关注能够实现绿色和可持续纳米制造工艺的环境和生物相容性试剂。本文旨在评估构建双金属纳米结构的绿色合成方法，重点是使用生物源资源（如植物提取物、DNA、蛋白质）作为安全实用的试剂。特别关注展示可控纳米级特征（如尺寸、组成、形态和构型）的生物源合成方案。还讨论了这些生物源制备的双金属纳米结构作为催化剂和传感器的潜在用途。希望本文将成为双金属纳米结构的宝贵参考，并有助于激发新的想法，以开发更环保的策略来可控合成各种类型的纳米结构双金属系统。
