NiO Quantum Dot Modified TiO2 toward Robust Hydrogen Production Performance

Weizhao Hong; Yansong Zhou; Chade Lv; Zhonghui Han; Gang Chen

doi:10.1021/acssuschemeng.7b03250

NiO Quantum Dot Modified TiO₂ toward Robust Hydrogen Production Performance

Weizhao Hong
, Yansong Zhou
, Chade Lv
, Zhonghui Han
, Gang Chen^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

Quantum dots (QDs) have great potential to build heterojunctions for efficient photocatalytic hydrogen production because of the quantum size effects, whereas they are limited by the rigorous preparation. Herein, we report a facile sacrificial coating strategy toward the construction of the NiO QDs/TiO₂ heterojunction. Shorter transmission distance of carriers and higher crystallinity between NiO QDs and TiO₂ substrate are achieved to minimize the recombination of photoinduced electrons and holes. As a result, excellent performance of 1.35 mmol h^-1 g^-1 over the NiO QDs/TiO₂ sample is achieved, which is 37 times higher than that of NiO/TiO₂ and 56 times higher than that of pure TiO₂. Furthermore, this is one of the best performances reported in heterojunctions made of NiO and TiO₂.

Original language	English
Pages (from-to)	889-896
Number of pages	8
Journal	ACS Sustainable Chemistry and Engineering
Volume	6
Issue number	1
DOIs	https://doi.org/10.1021/acssuschemeng.7b03250
State	Published - 2 Jan 2018
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Heterojunction
Photocatalysis
Quantum dots
Sacrificial coatings
TiO

Access to Document

10.1021/acssuschemeng.7b03250

Cite this

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title = "NiO Quantum Dot Modified TiO2 toward Robust Hydrogen Production Performance",

abstract = "Quantum dots (QDs) have great potential to build heterojunctions for efficient photocatalytic hydrogen production because of the quantum size effects, whereas they are limited by the rigorous preparation. Herein, we report a facile sacrificial coating strategy toward the construction of the NiO QDs/TiO2 heterojunction. Shorter transmission distance of carriers and higher crystallinity between NiO QDs and TiO2 substrate are achieved to minimize the recombination of photoinduced electrons and holes. As a result, excellent performance of 1.35 mmol h-1 g-1 over the NiO QDs/TiO2 sample is achieved, which is 37 times higher than that of NiO/TiO2 and 56 times higher than that of pure TiO2. Furthermore, this is one of the best performances reported in heterojunctions made of NiO and TiO2.",

keywords = "Heterojunction, Photocatalysis, Quantum dots, Sacrificial coatings, TiO",

author = "Weizhao Hong and Yansong Zhou and Chade Lv and Zhonghui Han and Gang Chen",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2018",

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doi = "10.1021/acssuschemeng.7b03250",

language = "英语",

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}

TY - JOUR

T1 - NiO Quantum Dot Modified TiO2 toward Robust Hydrogen Production Performance

AU - Hong, Weizhao

AU - Zhou, Yansong

AU - Lv, Chade

AU - Han, Zhonghui

AU - Chen, Gang

PY - 2018/1/2

Y1 - 2018/1/2

N2 - Quantum dots (QDs) have great potential to build heterojunctions for efficient photocatalytic hydrogen production because of the quantum size effects, whereas they are limited by the rigorous preparation. Herein, we report a facile sacrificial coating strategy toward the construction of the NiO QDs/TiO2 heterojunction. Shorter transmission distance of carriers and higher crystallinity between NiO QDs and TiO2 substrate are achieved to minimize the recombination of photoinduced electrons and holes. As a result, excellent performance of 1.35 mmol h-1 g-1 over the NiO QDs/TiO2 sample is achieved, which is 37 times higher than that of NiO/TiO2 and 56 times higher than that of pure TiO2. Furthermore, this is one of the best performances reported in heterojunctions made of NiO and TiO2.

AB - Quantum dots (QDs) have great potential to build heterojunctions for efficient photocatalytic hydrogen production because of the quantum size effects, whereas they are limited by the rigorous preparation. Herein, we report a facile sacrificial coating strategy toward the construction of the NiO QDs/TiO2 heterojunction. Shorter transmission distance of carriers and higher crystallinity between NiO QDs and TiO2 substrate are achieved to minimize the recombination of photoinduced electrons and holes. As a result, excellent performance of 1.35 mmol h-1 g-1 over the NiO QDs/TiO2 sample is achieved, which is 37 times higher than that of NiO/TiO2 and 56 times higher than that of pure TiO2. Furthermore, this is one of the best performances reported in heterojunctions made of NiO and TiO2.

KW - Heterojunction

KW - Photocatalysis

KW - Quantum dots

KW - Sacrificial coatings

KW - TiO

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