Fabrication of 2D sheet-like BiOCl/carbon quantum dothybrids via a template-free coprecipitation method and their tunable visible-light photocatalytic activities derived from different size distributions of carbon quantum dots

Fang Deng, Xiaoying Lu, Fei Zhong, Xule Pei, Xubiao Luo, Shenglian Luo, Dionysios D. Dionysiou, Chak Tong AU

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

A series of two-dimensional (2D) interlaced BiOCl/carbon quantum dot composites (denoted as BiOCl/CQD composites) were synthesized by a template-free coprecipitation method at room temperature, and the influence of different particle size distributions of the CQDs on the physiochemical properties and photocatalytic activities of the BiOCl/CQD composites was studied. CQDs can change the morphology and increase the specific surface area of the BiOCl/CQD composites. Moreover, the particle size distribution of the CQDs (CQD loading amount) has some effect on the light absorption, separation of photogenerated charge carriers, and photocatalytic performance of the BiOCl/CQD composites. The optimized size distribution of the CQDs is 50-150 nm. BiOCl/CQD (50-150 nm) composites showed the best improvement of light absorption and the highest photocurrent density of 0.44 μA cm-2, and exhibited the highest photocatalytic activity with almost 100% 2-nitrophenol removal under visible-light irradiation. The high efficacy of BiOCl/CQD (50-150 nm) composites could be attributed to their excellent light absorption and highly effective separation of photogenerated charge carriers.

Original languageEnglish
Article number065701
JournalNanotechnology
Volume27
Issue number6
DOIs
Publication statusPublished - 18 Jan 2016

Scopus Subject Areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

User-Defined Keywords

  • BiOCl/carbon quantum dot
  • composite
  • particle sizedistribution
  • photocatalytic activity
  • template-free coprecipitation

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