Nanoceria as an Electron Reservoir: Spontaneous Deposition of Metal Nanoparticles on Oxides and Their Anti-inflammatory Activities,ACS Nano

当前位置： X-MOL 学术 › ACS Nano › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Nanoceria as an Electron Reservoir: Spontaneous Deposition of Metal Nanoparticles on Oxides and Their Anti-inflammatory Activities
ACS Nano ( IF 15.8 ) Pub Date : 2022-11-17 , DOI: 10.1021/acsnano.2c07306
Faheem Muhammad ₁ , Futao Huang ₁ , Yuan Cheng ₁ , Xiwen Chen ₁ , Quan Wang ₁ , Chenxin Zhu ₁ , Yihong Zhang ₁ , Xiaohan Yang ₂ , Peng Wang ₁ , Hui Wei _{1,

3}

Affiliation

Designing metal–metal oxide heteronanostructures with synergistic and superior activities (unattainable in the case of a single entity) is of great interest for a wide range of technological applications. Traditional synthetic strategies typically require reducing agents, stabilizing ligands, or high temperature reductive treatment to produce oxide-supported metals. Herein, a facile noble metal deposition strategy is developed to produce silver, gold, and platinum nanocrystals on the surface of hollow mesoporous cerium oxide nanospheres without any pretreatment. Unlike the galvanic replacement reaction, the developed protocol employs the innate reductive potential of CeO₂ to produce a high density of ultrafine noble metal nanocrystals homogeneously immobilized onto the surface of CeO₂ nanospheres. The multienzyme-like activities (i.e., superoxide dismutase-like and catalase-like) of CeO₂@metal nanostructures, originating from CeO₂ and metal nanoparticles, were effectively utilized for anti-inflammatory therapies in two in vivo models. This oxygen vacancy-mediated reduction strategy can be generalized to produce diverse metal–metal oxide nanostructures for a wide range of applications.

中文翻译：

Nanoceria 作为电子库：金属纳米粒子在氧化物上的自发沉积及其抗炎活性

设计具有协同和卓越活性（在单个实体的情况下无法实现）的金属-金属氧化物异质纳米结构对于广泛的技术应用具有极大的兴趣。传统的合成策略通常需要还原剂、稳定配体或高温还原处理来生产氧化物负载的金属。在此，开发了一种简便的贵金属沉积策略，无需任何预处理即可在中空介孔氧化铈纳米球表面生成银、金和铂纳米晶体。与电流置换反应不同，开发的方案利用 CeO _{2的固有还原电位来产生均匀固定在 CeO}₂表面的高密度超细贵金属纳米晶体纳米球。_{CeO 2} @金属纳米结构的多酶样活性（即超氧化物歧化酶样和过氧化氢酶样）源自CeO _{2和金属纳米颗粒，在两种}体内模型中被有效地用于抗炎治疗。这种氧空位介导的还原策略可以推广到生产各种金属-金属氧化物纳米结构，用于广泛的应用。

更新日期：2022-11-17

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南