scholarly journals Electrostatic Field Enhanced Photocatalytic CO2 Conversion on BiVO4 Nanowires

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Shuai Yue ◽  
Lu Chen ◽  
Manke Zhang ◽  
Zhe Liu ◽  
Tao Chen ◽  
...  
Keyword(s):  
Electrostatic Field ◽  
Photocatalytic Performance ◽  
Energy Conversion Efficiency ◽  
Model Structure ◽  
Co2 Conversion ◽  
Surface Absorption ◽  
Recombination Loss ◽  
Reduction Efficiency ◽  
Photocatalytic Co2 Conversion ◽  
Enhanced Surface

AbstractThe recombination loss of photo-carriers in photocatalytic systems fatally determines the energy conversion efficiency of photocatalysts. In this work, an electrostatic field was used to inhibit the recombination of photo-carriers in photocatalysts by separating photo-holes and photo-electrons in space. As a model structure, (010) facet-exposed BiVO4 nanowires were grown on PDMS-insulated piezo-substrate of piezoelectric transducer (PZT). The PZT substrate will generate an electrostatic field under a certain stress, and the photocatalytic behavior of BiVO4 nanowires is influenced by the electrostatic field. Our results showed that the photocatalytic performance of the BiVO4 nanowires in CO2 reduction in the negative electrostatic field is enhanced to 5.5-fold of that without electrostatic field. Moreover, the concentration of methane in the products was raised from 29% to 64%. The enhanced CO2 reduction efficiency is mainly attributed to the inhibited recombination loss of photo-carriers in the BiVO4 nanowires. The increased energy of photo-carriers and the enhanced surface absorption to polar molecules, which are CO in this case, were also play important roles in improving the photocatalytic activity of the photocatalyst and product selectivity. This work proposed an effective strategy to improve photo-carriers separation/transfer dynamics in the photocatalytic systems, which will also be a favorable reference for photovoltaic and photodetecting devices.

scholarly journals TiO2 Based Nanostructures for Photocatalytic CO2 Conversion to Valuable Chemicals

Micromachines ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 326 ◽  
Author(s):  
Abdul Razzaq ◽  
Su-Il In
Keyword(s):  
Noble Metals ◽  
Photocatalytic Performance ◽  
Light Trapping ◽  
High Surface ◽  
Three Dimensional ◽  
Value Added ◽  
Co2 Conversion ◽  
Surface Areas ◽  
Tio2 Nanosheets ◽  
Photocatalytic Co2 Conversion

Photocatalytic conversion of CO2 to useful products is an alluring approach for acquiring the two-fold benefits of normalizing excess atmospheric CO2 levels and the production of solar chemicals/fuels. Therefore, photocatalytic materials are continuously being developed with enhanced performance in accordance with their respective domains. In recent years, nanostructured photocatalysts such as one dimensional (1-D), two dimensional (2-D) and three dimensional (3-D)/hierarchical have been a subject of great importance because of their explicit advantages over 0-D photocatalysts, including high surface areas, effective charge separation, directional charge transport, and light trapping/scattering effects. Furthermore, the strategy of doping (metals and non-metals), as well as coupling with a secondary material (noble metals, another semiconductor material, graphene, etc.), of nanostructured photocatalysts has resulted in an amplified photocatalytic performance. In the present review article, various titanium dioxide (TiO2)-based nanostructured photocatalysts are briefly overviewed with respect to their application in photocatalytic CO2 conversion to value-added chemicals. This review primarily focuses on the latest developments in TiO2-based nanostructures, specifically 1-D (TiO2 nanotubes, nanorods, nanowires, nanobelts etc.) and 2-D (TiO2 nanosheets, nanolayers), and the reaction conditions and analysis of key parameters and their role in the up-grading and augmentation of photocatalytic performance. Moreover, TiO2-based 3-D and/or hierarchical nanostructures for CO2 conversions are also briefly scrutinized, as they exhibit excellent performance based on the special nanostructure framework, and can be an exemplary photocatalyst architecture demonstrating an admirable performance in the near future.

Photocatalytic CO2 conversion over single-atom MoN2 sites of covalent organic framework

2021 ◽  
Vol 291 ◽  
pp. 120146
Author(s):  
Mingpu Kou ◽  
Wei Liu ◽  
Yongye Wang ◽  
Jindi Huang ◽  
Yanli Chen ◽  
...  
Keyword(s):  
Single Atom ◽  
Co2 Conversion ◽  
Covalent Organic Framework ◽  
Photocatalytic Co2 Conversion ◽  
Organic Framework

Water nanodomain for efficient photocatalytic CO2 reduction to CO

2021 ◽  
Author(s):  
Gang Chen ◽  
Xiuyan Cheng ◽  
Jianling Zhang ◽  
Qiang Wan ◽  
Ran Duan ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Evolution Rate ◽  
Co2 Conversion ◽  
Photocatalytic Co2 Conversion

Herein we propose the utilization of nanosized water domain for photocatalytic CO2 conversion, by which CO2 can be efficiently reduced to CO with CO evolution rate of 682 µmol g-1...

Is water more reactive than H2 in photocatalytic CO2 conversion into fuels using semiconductor catalysts under high reaction pressures?

2017 ◽  
Vol 352 ◽  
pp. 452-465 ◽  
Author(s):  
Hongwei Zhang ◽  
Shogo Kawamura ◽  
Masayuki Tamba ◽  
Takashi Kojima ◽  
Mao Yoshiba ◽  
...  
Keyword(s):  
Co2 Conversion ◽  
High Reaction ◽  
Photocatalytic Co2 Conversion

Photocatalytic CO2 conversion to methanol by Cu2O/graphene/TNA heterostructure catalyst in a visible-light-driven dual-chamber reactor

Nano Energy ◽  
2016 ◽  
Vol 27 ◽  
pp. 320-329 ◽  
Author(s):  
Fei Li ◽  
Li Zhang ◽  
Jincheng Tong ◽  
Yingliang Liu ◽  
Shengang Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Co2 Conversion ◽  
Dual Chamber ◽  
Visible Light Driven ◽  
Photocatalytic Co2 Conversion

scholarly journals Plasmon-Enhanced Photocatalytic CO2 Conversion within Metal–Organic Frameworks under Visible Light

2016 ◽  
Vol 139 (1) ◽  
pp. 356-362 ◽  
Author(s):  
Kyung Min Choi ◽  
Dohyung Kim ◽  
Bunyarat Rungtaweevoranit ◽  
Christopher A. Trickett ◽  
Jesika Trese Deniz Barmanbek ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Organic Frameworks ◽  
Co2 Conversion ◽  
Metal Organic ◽  
Photocatalytic Co2 Conversion

scholarly journals Effects of Cr Doping and Water Content on the Crystal Structure Transitions of Ba2In2O5

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1548
Author(s):  
Raphael Finger ◽  
Marc Widenmeyer ◽  
Thomas C. Hansen ◽  
Dirk Wallacher ◽  
Stanislav Savvin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Water Content ◽  
Structural Changes ◽  
Equimolar Amount ◽  
Co2 Conversion ◽  
Temperature Dependent ◽  
X Ray ◽  
Photocatalytic Co2 Conversion ◽  
Cr Doping

Temperature-dependent crystal structure alterations in the brownmillerite-type material Ba2In2O5 play a fundamental role in its applications: i) photocatalytic CO2 conversion; ii) oxygen transport membranes; and iii) proton conduction. This is connected to a reversible uptake of up an equimolar amount of water. In this study, in situ X-ray and neutron diffraction were combined with Raman spectroscopy and solid-state nuclear magnetic resonance experiments to unravel the effects of Cr doping and water content on the crystal structure transitions of Ba2In2O5(H2O)x over a wide temperature range (10 K ≤ T ≤ 1573 K, x < 1). A mixture of isolated and correlated protons was identified, leading to a highly dynamic situation for the protons. Hence, localisation of the protons by diffraction techniques was not possible. Cr doping led to an overall higher degree of disorder and stabilisation of the tetragonal polymorph, even at 10 K. In contrast, a further disordering at high temperatures, leading to a cubic polymorph, was found at 1123 K. Cr doping in Ba2In2O5 resulted in severe structural changes and provides a powerful way to adjust its physical properties to the respective application.

Sign in / Sign up

Export Citation Format

Share Document