Recycling Carbon Fiber-Reinforced Polymers (CFRPs) to Construct CFs/TiO2 Nanotexture with Efficient Interface Charge Transfer for Stimulating Photocatalytic Hydrogen Production

Muhammad Tahir, Marriam Taha H. Alesayi, Shaikha Mohammed S. Alshehhi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In this work, carbon fiber-reinforced polymer (CFRP) waste-derived carbon fibers (CFs) coupled with TiO2 for photocatalytic hydrogen production have been investigated. The CFs were found to be promising for enhancing visible light absorption and preventing photoinduced charge carrier recombination. The role of interface interaction and morphology was further investigated by synthesizing nanocomposites through physical mixing (CFs/TiO2) and sol-gel methods (CFs/TiO2-S). The optimized 3CFs/TiO2 produces 2.87 times more hydrogen than using only TiO2. This noticeable enhancement was due to efficient charge separation in the presence of CFs with high visible light absorption. Comparatively, the CFs/TiO2-S nanotexture produced H2 at 2268.4 μmol g-1 h-1, which is 6-12 fold greater than that for CFs/TiO2 and pristine TiO2 samples. Using the sol-gel approach, TiO2 was effectively attached over the entire surface of CFs, enabling good interface interaction and efficient charge carrier separation, resulting in significantly enhanced H2 production. Among the various operating parameters, glycerol as a sacrificial reagent was promising to improve H2 yield, whereas it has a lower photostability than methanol after five consecutive cycles. The highest AQY of 26.3% for H2 production was obtained with 150 mg of catalyst loading under low-intensity light irradiation. This study introduces a new technique to recycle solid waste CFRPs to produce CF-based composites that might be advantageous to boost performance in solar energy-related applications.

Original languageEnglish
Pages (from-to)12319-12334
Number of pages16
JournalEnergy and Fuels
Volume37
Issue number16
DOIs
Publication statusPublished - Aug 17 2023

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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