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Related Experiment Video

Updated: Mar 9, 2026

Gold Nanoparticle Synthesis

Gold Nanoparticle Synthesis

Published on: July 10, 2021

Achieving nano-gold stability through rational design.

Dean H Barrett¹, Michael S Scurrell², Cristiane B Rodella³

¹Molecular Sciences Institute , School of Chemistry , University of the Witwatersrand , Private Bag PO Wits , Braamfontein , 2050 , South Africa . Email: paul.franklyn@wits.ac.za; Brazilian Synchrotron Light Laboratory (LNLS)/Brazilian Center for Research in Energy and Materials (CNPEM) , C. P. 6192 , 13083-970 , Campinas , SP , Brazil .

Chemical Science

|January 3, 2017

Summary

This summary is machine-generated.

This study presents a durable and thermally stable gold-titanium dioxide (Au-TiO2) catalyst. The novel nanorod structure prevents nanoparticle sintering, maintaining high activity for CO oxidation even after extreme heat exposure, promising for industrial applications.

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Last Updated: Mar 9, 2026

Gold Nanoparticle Synthesis

Gold Nanoparticle Synthesis

Published on: July 10, 2021

A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions

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Published on: February 5, 2016

Versatile Technique to Produce a Hierarchical Design in Nanoporous Gold

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Published on: February 10, 2023

Area of Science:

Nanomaterials Science
Catalysis
Materials Chemistry

Background:

Nanoscale gold (Au) exhibits unique reactivity, unlike its bulk counterpart.
Nano-Au dispersed on metal oxides like TiO2 shows high catalytic activity for various industrial reactions.
High temperatures in industrial applications cause Au nanoparticle sintering, leading to loss of catalytic activity.

Purpose of the Study:

To develop a durable and thermally stable Au-TiO2 catalyst.
To overcome the challenge of Au nanoparticle sintering under harsh industrial conditions.
To create a catalyst that maintains high activity at low temperatures after thermal stress.

Main Methods:

Rational design of a 3-dimensional, radially aligned nanorod structure.
Scalable and facile synthesis of the Au-TiO2 catalyst.
Characterization through morphological and structural studies to assess thermal stability.

Main Results:

The developed catalyst exhibits a stable, thermodynamically locked polymorph nanorod structure.
Au nanoparticles are isolated on the support structure, preventing aggregation.
The catalyst maintains light-off for CO oxidation below 115 °C, even after multiple 800 °C cycles.

Conclusions:

The rationally designed Au-TiO2 catalyst demonstrates exceptional thermal stability and durability.
The catalyst's ability to resist sintering and maintain low-temperature activity is promising for industrial applications.
This work offers a pathway to robust nanocatalysts for demanding environments.