Functionalized nano diamond composites for photocatalytic hydrogen evolution and effective pollutant degradation

Muhammad Khan, Asif Hayat, Sunil Kumar Baburao Mane, Tiehu Li, Naghma Shaishta, Dang Alei, Ting Kai Zhao, Azeem Ullah, Amir Zada, Ata Ur Rehman, Wasim Ullah Khan

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

Development of superior heterogeneous photocatalyst for hydrogen (H2) evolution with promising pollutant degradable capacity is a significant feature but then again thought-provoking for shaping the energy and environmental issues. In this regard, a photocatalytic H2 evolution using nano diamond (ND) semiconducting materials having pollutant degradable capacity for Rhodamine B dye (RhB) has been rarely reported and hence predicted to the sustainable energy. Productive characteristics such good chemical stability, super hardness, nanometer size, biocompatibility and thermal conductivity, ND is a capable and highly valuable powder physical material. Non-uniform and agglomeration dispersion spread of ND in different solvents are the main problems preventing ND from the wide-use in commercial applications. Upon 535 nm solar light excitation, the fabricated ND sample exhibit remarkable photocatalytic H2 production with a HER of about 400 μmol h−1 than pristine ND (197 μmol h−1). Additionally, this H2 generation dramatically enhances the quantum yield, indicating the H2 terminated sites work as electron reservoirs. Precisely, the kinetic constant pseudo-order of FND for photodegradation of RhB was higher as compared with pristine ND. As such, the results show an important step toward tailor-designed and explain the vital role of FND composites for the rational motifs of fruitful photocatalyst with effective pollutant degradable capability for future demand.

Original languageEnglish
Pages (from-to)29070-29081
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number53
DOIs
StatePublished - 30 Oct 2020

Keywords

  • And hydrogen evolution rate (HER)
  • Ball milling technique
  • ND/Epoxy nanocomposite
  • Nano diamond
  • Pollutant degradation

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