1
|
Liu C, Wang C, Wang R, Li D, Jin D, Ohtani B, Liu B, Ma H, Du J, Liu Y, Zhang X. Ultrasonic-Induced Surface Disordering Promotes Photocatalytic Hydrogen Evolution of TiO 2. ACS APPLIED MATERIALS & INTERFACES 2024; 16:48649-48659. [PMID: 39191507 DOI: 10.1021/acsami.4c10977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Surface disordering has been considered an effective strategy for tailoring the charge separation and surface chemistry of semiconductor photocatalysts. A simple but reliable method to create surface disordering is, therefore, urgently needed for the development of high-performance semiconductor photocatalysts and their practical applications. Herein, we report that the ultrasonic processing, which is commonly employed in the dispersion of photocatalysts, can induce the surface disordering of TiO2 and significantly promote its performance for photocatalytic hydrogen evolution. A 40 min ultrasonic treatment of TiO2 (Degussa P25) enhances the photocatalytic hydrogen production by 42.7 times, achieving a hydrogen evolution rate of 1425.4 μmol g-1 h-1 without any cocatalyst. Comprehensive structural, spectral, and electrochemical analyses reveal that the ultrasonic treatment induces the surface disordering of TiO2, and consequently reduces the density of deep electron traps, extends the separation of photogenerated charges, and facilitates the hydrogen evolution reaction relative to oxygen reduction. The ultrasonic treatment manifests a more pronounced effect on disordering the surface of anatase than rutile, agreeing well with the enhanced photocatalysis of anatase rather than rutile. This study demonstrates that ultrasonic-induced surface disordering could be an effective strategy for the activation of photocatalysts and might hold significant implications for the applications in photocatalytic hydrogen evolution, small molecule activation, and biomass conversion.
Collapse
Affiliation(s)
- Chunyao Liu
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Changhua Wang
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Rui Wang
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Dashuai Li
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Dexin Jin
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Bunsho Ohtani
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Baoshun Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122, Luoshi Road, Wuhan 430070, China
| | - He Ma
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Jinglun Du
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Yichun Liu
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Xintong Zhang
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, China
| |
Collapse
|
2
|
Zhu Z, Xuan Y, Liu X, Zhu Q. Revealing the stochastic kinetics evolution of photocatalytic CO 2 reduction. NANOSCALE 2023; 15:730-741. [PMID: 36520137 DOI: 10.1039/d2nr05413b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Investigating kinetic mechanisms to design efficient photocatalysts is critical for improving photocatalytic CO2 reduction, but the stochastic photo-physical/chemical properties of kinetics remain unclear. Herein, we propose a statistical study to discuss the stochastic feature evolution of photocatalytic systems. The uncertainties of light absorption, charge carrier migration, and surface reaction are described by nonparametric estimation methods in the proposed model, which includes the effect of operational and material parameters. The density distribution of surface electrons shifts from a skewed distribution to an approximate uniform distribution as incident photon density increases. The system temperature rising induces the rate-determining step of surface reactions to change from charge carrier kinetics to reactant activation processes. Benefiting from the synergistic optimization between the operational parameter and active site density, the electron-capturing probability of active sites is boosted from 0.06 to 0.17. The modified reaction kinetic equation is constructed based on the distribution function of charge carrier kinetics. Furthermore, the experimental photoactivity results are consistent with the statistical analysis, which proves the feasibility of the established model. The characterization tests show that the gap between testing activities and theoretical efficiency is caused by a mismatch between charge carrier supply and mass transfer. Our work unveils the stochastic features in photocatalytic CO2 reduction, offering a comprehensive analytical framework for photocatalytic system optimization.
Collapse
Affiliation(s)
- Zhonghui Zhu
- School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
| | - Yimin Xuan
- School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
- Integrated Energy Research Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Xianglei Liu
- School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
- Integrated Energy Research Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Qibin Zhu
- School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
- Integrated Energy Research Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| |
Collapse
|
3
|
Wang R, Che G, Wang C, Liu C, Liu B, Ohtani B, Liu Y, Zhang X. Alcohol Plasma Processed Surface Amorphization for Photocatalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Wang
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Guangshun Che
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Changhua Wang
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Chunyao Liu
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Baoshun Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122, Luoshi Road, Wuhan 430070, People’s Republic of China
| | - Bunsho Ohtani
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Yichun Liu
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Xintong Zhang
- Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| |
Collapse
|
4
|
Paul R, Warkad IR, Arulkumar S, Parthiban S, Darji HR, Naushad M, Kadam RG, Gawande MB. Facile synthesis of nanostructured TiO2-SiO2 powder for selective photocatalytic oxidation of alcohols to carbonyl compounds. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
5
|
Zhu Z, Xuan Y, Liu X, Zhang K, Zhang Y, Zhu Q, Wang J. What role does the incident light intensity play in photocatalytic conversion of CO2: Attenuation or intensification? Chemphyschem 2022; 23:e202100851. [DOI: 10.1002/cphc.202100851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/11/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Zhonghui Zhu
- Nanjing University of Aeronautics and Astronautics School of Energy and Power Engineering CHINA
| | - Yimin Xuan
- Nanjing University of Science and Technology School of Energy and Power Engineering 200 Xiao Ling Wei 210094 Nanjing CHINA
| | - Xianglei Liu
- Nanjing University of Aeronautics and Astronautics school of energy and power engineering CHINA
| | - Kai Zhang
- Nanjing University of Aeronautics and Astronautics school of energy and power engineering CHINA
| | - Ying Zhang
- Nanjing University of Science and Technology School of energy and power engineering CHINA
| | - Qibin Zhu
- Nanjing University of Aeronautics and Astronautics school of energy and power engineering CHINA
| | - Jin Wang
- Nanjing University of Aeronautics and Astronautics school of energy and power engineering CHINA
| |
Collapse
|
6
|
In-situ route for the graphitized carbon/TiO2 composite photocatalysts with enhanced removal efficiency to emerging phenolic pollutants. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(20)63565-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
7
|
Liu B, Wu H, Parkin IP. New Insights into the Fundamental Principle of Semiconductor Photocatalysis. ACS OMEGA 2020; 5:14847-14856. [PMID: 32596623 PMCID: PMC7315598 DOI: 10.1021/acsomega.0c02145] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 06/03/2020] [Indexed: 05/17/2023]
Abstract
Although photocatalysis has been studied for many years as an attractive way to resolve energy and environmental problems, its principle still remains unclear. Some confusions and misunderstandings exist in photocatalytic studies. This research aims to elaborate some new thoughts on the fundamental principle of semiconductor photocatalysis. Starting from the basic laws of thermodynamics, we first defined the thermodynamic potential of photocatalysis. A concept, the Gibbs potential landscape, was thus then proposed to describe the kinetics of photocatalysis. Photocatalysis is therefore defined as a light-driven chemical reaction that still needs heat activation, in that light and heat play their different roles and interact with each other. Photocatalysis should feature an activation energy functioning with both light and heat. The roles of light and heat are correlative and mutually inhibit at both levels of thermodynamics and kinetics, so it is impossible for an intrinsic light-heat synergism to happen. Two criteria were further proposed to determine an intrinsic light-heat synergism in photocatalysis. Experiments were also carried out to calculate the thermodynamic potential and can agree well with the theory. Experimental results proved that there is no intrinsic light-heat synergism, in accordance with our theoretical prediction. This research clarified some misunderstandings and gained some new insights into the nature of photocatalysis; this is important for the discipline of semiconductor photocatalysis.
Collapse
Affiliation(s)
- Baoshun Liu
- State
Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan City, Hubei Province 430070, People’s Republic
of China
| | - Hao Wu
- State
Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan City, Hubei Province 430070, People’s Republic
of China
| | - Ivan P. Parkin
- Department
of Chemistry, Materials Chemistry Centre, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| |
Collapse
|
8
|
Li D, Huang Y, Li S, Wang C, Li Y, Zhang X, Liu Y. Thermal coupled photoconductivity as a tool to understand the photothermal catalytic reduction of CO2. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63475-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
9
|
Liu B, Zhao X, Yu J, Parkin IP, Fujishima A, Nakata K. Intrinsic intermediate gap states of TiO2 materials and their roles in charge carrier kinetics. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2019. [DOI: 10.1016/j.jphotochemrev.2019.02.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
10
|
Wang J, Liu B, Nakata K. Effects of crystallinity, {001}/{101} ratio, and Au decoration on the photocatalytic activity of anatase TiO2 crystals. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(18)63174-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
11
|
Abstract
Titanium dioxide (TiO2) nanomaterials have garnered extensive scientific interest since 1972 and have been widely used in many areas, such as sustainable energy generation and the removal of environmental pollutants. Although TiO2 possesses the desired performance in utilizing ultraviolet light, its overall solar activity is still very limited because of a wide bandgap (3.0–3.2 eV) that cannot make use of visible light or light of longer wavelength. This phenomenon is a deficiency for TiO2 with respect to its potential application in visible light photocatalysis and photoelectrochemical devices, as well as photovoltaics and sensors. The high overpotential, sluggish migration, and rapid recombination of photogenerated electron/hole pairs are crucial factors that restrict further application of TiO2. Recently, a broad range of research efforts has been devoted to enhancing the optical and electrical properties of TiO2, resulting in improved photocatalytic activity. This review mainly outlines state-of-the-art modification strategies in optimizing the photocatalytic performance of TiO2, including the introduction of intrinsic defects and foreign species into the TiO2 lattice, morphology and crystal facet control, and the development of unique mesocrystal structures. The band structures, electronic properties, and chemical features of the modified TiO2 nanomaterials are clarified in detail along with details regarding their photocatalytic performance and various applications.
Collapse
|
12
|
Chen Y, Li W, Jiang D, Men K, Li Z, Li L, Sun S, Li J, Huang ZH, Wang LN. Facile synthesis of bimodal macroporous g-C 3N 4/SnO 2 nanohybrids with enhanced photocatalytic activity. Sci Bull (Beijing) 2019; 64:44-53. [PMID: 36659522 DOI: 10.1016/j.scib.2018.12.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/26/2018] [Accepted: 12/09/2018] [Indexed: 01/21/2023]
Abstract
It is of vital importance to construct highly interconnected, macroporous photocatalyst to improve its efficiency and applicability in solar energy conversion and environment remediation. Graphitic-like C3N4 (g-C3N4), as an analogy to two-dimensional (2D) graphene, is highly identified as a visible-light-responsive polymeric semiconductor. Moreover, the feasibility of g-C3N4 in making porous structures has been well established. However, the preparation of macroporous g-C3N4 with abundant porous networks and exposure surface, still constitutes a difficulty. To solve it, we report a first facile preparation of bimodal macroporous g-C3N4 hybrids with abundant in-plane holes, which is simply enabled by in-situ modification through thermally treating the mixture of thiourea and SnCl4 (pore modifier) after rotary evaporation. For one hand, the formed in-plane macropores endow the g-C3N4 system with plentiful active sites and short, cross-plane diffusion channels that can greatly speed up mass transport and transfer. For another, the heterojunctions founded between g-C3N4 and SnO2 consolidate the electron transfer reaction to greatly reduce the recombination probability. As a consequence, the resulted macroporous g-C3N4/SnO2 nanohybrid had a high specific surface area (SSA) of 44.3 m2/g that was quite comparable to most nano/mesoporous g-C3N4 reported. The interconnected porous network also rendered a highly intensified light absorption by strengthening the light penetration. Together with the improved mass transport and electron transfer, the macroporous g-C3N4/SnO2 hybrid exhibited about 2.4-fold increment in the photoactivity compared with pure g-C3N4. Additionally, the recyclability of such hybrid could be guaranteed after eight successive uses.
Collapse
Affiliation(s)
- Yingzhi Chen
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Wenhao Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Dongjian Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Kuo Men
- State Key Laboratory of Advanced Materials for Smart Sensing, General Research Institute for Non-Ferrous Metals, Beijing 101407, China
| | - Zhen Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ling Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Shizheng Sun
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jingyuan Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zheng-Hong Huang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Lu-Ning Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China.
| |
Collapse
|