Imperial College London
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Dr Robert Hoye, FIMMM CEng CSci

Faculty of Engineering, Department of Materials

Honorary Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6048r.hoye Website

 
 
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Location

 

2.27Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yashwanth:2022:10.1039/d2cp01405j,
author = {Yashwanth, HJ and Rondiya, S and Dzade, N and Hoye, R and Choudhary, RJ and Phase, DM and Dhole, SD and Hareesh, K},
doi = {10.1039/d2cp01405j},
journal = {Physical Chemistry Chemical Physics},
pages = {15271--15279},
title = {Improved photocatalytic activity of TiO2 nanoparticles through nitrogen and phosphorus co-doped carbon quantum dots: an experimental and theoretical study},
url = {http://dx.doi.org/10.1039/d2cp01405j},
volume = {24},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this work, we develop a photocatalyst wherein nitrogen and phosphorus co-doped carbon quantum dots are scaffolded onto TiO2 nanoparticles (NPCQD/TiO2), denoted as NPCT hereafter. The developed NPCT photocatalyst exhibits an enhanced visible light photocatalytic hydrogen production of 533 μmol h−1 g−1 compared to nitrogen doped CQD/TiO2 (478 μmol h−1 g−1), phosphorus doped CQD/TiO2 (451 μmol h−1 g−1) and pure CQD/TiO2 (427 μmol h−1 g−1) photocatalysts. The enhanced photocatalytic activity of the NPCT photocatalyst is attributed to the excellent synergy between NPCQDs and TiO2 nanoparticles, which results in the creation of virtual energy levels, a decrease in work function and suppressed recombination rates, thereby increasing the lifetime of photogenerated electrons. A detailed mechanism is proposed for the enhancement in visible light hydrogen production by the NPCT photocatalyst from the experimental results, Mott–Schottky plots and ultraviolet photoelectron spectroscopy results. Further, first-principles density functional theory (DFT) simulations are carried out which predict the decrease in the work function and band gap, and the increase in the density of states of NPCT as the factors responsible for the observed enhancement in visible light photocatalytic hydrogen production.
AU  - Yashwanth,HJ
AU  - Rondiya,S
AU  - Dzade,N
AU  - Hoye,R
AU  - Choudhary,RJ
AU  - Phase,DM
AU  - Dhole,SD
AU  - Hareesh,K
DO  - 10.1039/d2cp01405j
EP  - 15279
PY  - 2022///
SN  - 1463-9076
SP  - 15271
TI  - Improved photocatalytic activity of TiO2 nanoparticles through nitrogen and phosphorus co-doped carbon quantum dots: an experimental and theoretical study
T2  - Physical Chemistry Chemical Physics
UR  - http://dx.doi.org/10.1039/d2cp01405j
UR  - https://pubs.rsc.org/en/content/articlelanding/2022/CP/D2CP01405J
UR  - http://hdl.handle.net/10044/1/97683
VL  - 24
ER  -
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