An optofluidic planar microreactor for photocatalytic reduction of CO2in alkaline environment

Xiao Cheng, Rong Chen, Xun Zhu, Qiang Liao, Liang An, Dingding Ye, Xuefeng He, Shuzhe Li, Lin Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)


In this work, an optofluidic planar microreactor is designed and fabricated for the photocatalytic reduction of CO2with liquid water in alkaline environment. Such design offers several advantages of large surface-area-to-volume ratio, enhanced mass and photon transfer and more uniform light distribution. The performance of the developed planar microreactor is evaluated by measuring the methanol concentration to estimate the methanol yield under various operating parameters, including the liquid flow rate, light intensity, catalyst loading and NaOH concentration. It is shown that increasing the liquid flow rate firstly improves and then decreases the methanol concentration while the methanol yield continuously increases as the liquid flow rate increases. The increase of the light intensity and NaOH concentration increases both the methanol concentration and yield. Increasing the catalyst loading firstly improves the performance and then results in the reduction of the performance. A maximum methanol yield of 454.6 μmole/g-cat·h is achieved under a liquid flow rate of 50 μL/min, 0.2 M NaOH, and the light intensity of 8 mW/cm2.
Original languageEnglish
Pages (from-to)276-282
Number of pages7
Publication statusPublished - 1 Jan 2017


  • Methanol concentration
  • Methanol yield
  • Optofluidic planar microreactor
  • Photocatalytic reduction of CO 2

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Energy(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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