Jump to main content
Jump to site search


Cyclodextrin-Gold Nanoclusters on TiO2 Enhances Photocatalytic Decomposition of Organic Pollutants

Abstract

The application of titanium dioxide (TiO2) for various environmental applications has become a promising choice due to its high efficiency of photocatalytic decomposition of organic pollutants. The drive of exploring various forms of TiO2 towards this goal has been influenced by its low cost and high photostability. A recent surge of interest is to develop various TiO2-based hybrid materials to enhance their photocatalytic performance. Here we introduce a such hybrid material, consisting of TiO2 nanoparticles (NPs) and per-6-thio-β-cyclodextrin (SH-β-CD) protected gold nanoclusters (Au NCs). Leveraging on the complementary properties of TiO2 NPs, Au NCs, and reactive SH-β-CD surface, the as-designed hybrid materials showed improved photocatalytic performance over the TiO2 NPs. Considering the fact that traditional thiolate ligands on the Au NC surface would create a physical barrier in photocatalytic reaction, SH-β-CD was chosen as thiolate ligands for the synthesis of Au NCs, building upon its unique host-guest chemistry towards target organic pollutants. Indeed, the synergy created by the Au core, TiO2 NPs, as well as the SH-β-CD ligands (with a hydrophobic cavity, which could effectively capture and absorb organic targets via host-guest interaction), showed boosting effects on photocatalytic decomposition of organic pollutants, such as methyl orange (MO) (e.g., under a similar experimental condition, the degradation efficiency of pure TiO2 was ~47%, while for the hybrid TiO2, this value was ~98%).

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Oct 2017, accepted on 04 Dec 2017 and first published on 05 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA09443D
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Cyclodextrin-Gold Nanoclusters on TiO2 Enhances Photocatalytic Decomposition of Organic Pollutants

    H. Zhu, N. Goswami, Q. Yao, T. Chen, Y. Liu, Q. Xu, D. Chen, J. Lu and J. Xie, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA09443D

Search articles by author

Spotlight

Advertisements