scholarly journals Semiconducting Nanocrystalline Bismuth Oxychloride (BiOCl) for Photocatalytic Reduction of CO2

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 998
Author(s):  
Dalia Sánchez-Rodríguez ◽  
Alma Berenice Jasso-Salcedo ◽  
Niklas Hedin ◽  
Tamara L. Church ◽  
Aitor Aizpuru ◽  
...  

The reduction of CO2 is relevant for the production of compounds as part of the carbon capture and utilization research approaches. Thus, photocatalytic reduction of CO2 over a tailored BiOCl-based photocatalyst (BTEG) was tested under UV light (365 nm). BTEG was synthesized in the presence of triethylene glycol, which gave 4-nm crystallites, much smaller than the 30 nm crystallites of commercial BiOCl. Commercial BiOCl reduced CO2 mainly to methane with a minor fraction of ethanol, and was inactivated after 20 h. BTEG was a more active catalyst for CO2 photoreduction, producing approximately equal amounts of methane, methanol, and ethanol while consuming 0.38 µmol g−1 h−1 of CO2 before the experiment was stopped after 43 h, with the catalyst still active. The different products formed by the BTEG photocatalyst samples were tentatively ascribed to its greater content of {110} facets. Thus, in addition to band-gap tuning, the relative fractions of BiOCl facets had a key role in the effective photocatalytic reduction of CO2, and the BiOCl-based BTEG catalyst promoted the formation of important compounds as methanol and ethanol.

2021 ◽  
Vol 14 (1) ◽  
pp. 374
Author(s):  
S.-P. Cheng ◽  
L.-W. Wei ◽  
H.-Paul Wang

The conversion of CO2 to low-carbon fuels using solar energy is considered an economically attractive and environmentally friendly route. The development of novel catalysts and the use of solar energy via photocatalysis are key to achieving the goal of chemically reducing CO2 under mild conditions. TiO2 is not very effective for the photocatalytic reduction of CO2 to low-carbon chemicals such as methanol (CH3OH). Thus, in this work, novel Cu2O/TiO2 heterojunctions that can effectively separate photogenerated electrons and holes were prepared for photocatalytic CO2-to-CH3OH. More visible light-active Cu2O in the Cu2O/TiO2 heterojunctions favors the formation of methanol under visible light irradiation. On the other hand, under UV-Vis irradiation for 6 h, the CH3OH yielded from the photocatalytic CO2-to-CH3OH by the Cu2O/TiO2 heterojunctions is 21.0–70.6 µmol/g-catalyst. In contrast, the yield of CH3OH decreases with an increase in the Cu2O fraction in the Cu2O/TiO2 heterojunctions. It seems that excess Cu2O in Cu2O/TiO2 heterojunctions may lead to less UV light exposure for the photocatalysts, and may decrease the conversion efficiency of CO2 to CH3OH.


2014 ◽  
Vol 50 (52) ◽  
pp. 6923 ◽  
Author(s):  
Lling-Lling Tan ◽  
Wee-Jun Ong ◽  
Siang-Piao Chai ◽  
Abdul Rahman Mohamed

2020 ◽  
Vol 49 (47) ◽  
pp. 17243-17251
Author(s):  
Mohammad Azam ◽  
Umesh Kumar ◽  
Joshua O. Olowoyo ◽  
Saud I. Al-Resayes ◽  
Agata Trzesowska-Kruszynska ◽  
...  

The newly synthesized dinuclear uranyl salen coordination compound showed excellent photocatalytic reduction of CO2 to methanol.


2020 ◽  
Vol 10 (8) ◽  
pp. 2663-2680 ◽  
Author(s):  
Niwesh Ojha ◽  
Abhinav Bajpai ◽  
Sushant Kumar

Strategic doping of metals and non-metals into a photocatalyst can help in tuning the band gap and alignment of band structure.


Author(s):  
Muhammad Ashraf Sabri ◽  
Samar Al Jitan ◽  
Daniel Bahamon ◽  
Lourdes F. Vega ◽  
Giovanni Palmisano

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shofu Matsuda ◽  
Yuuki Niitsuma ◽  
Yuta Yoshida ◽  
Minoru Umeda

AbstractGenerating electric power using CO2 as a reactant is challenging because the electroreduction of CO2 usually requires a large overpotential. Herein, we report the design and development of a polymer electrolyte fuel cell driven by feeding H2 and CO2 to the anode (Pt/C) and cathode (Pt0.8Ru0.2/C), respectively, based on their theoretical electrode potentials. Pt–Ru/C is a promising electrocatalysts for CO2 reduction at a low overpotential; consequently, CH4 is continuously produced through CO2 reduction with an enhanced faradaic efficiency (18.2%) and without an overpotential (at 0.20 V vs. RHE) was achieved when dilute CO2 is fed at a cell temperature of 40 °C. Significantly, the cell generated electric power (0.14 mW cm−2) while simultaneously yielding CH4 at 86.3 μmol g−1 h−1. These results show that a H2-CO2 fuel cell is a promising technology for promoting the carbon capture and utilization (CCU) strategy.


2021 ◽  
Author(s):  
Yurong Shan ◽  
Dexiang Liu ◽  
Chunyan Xu ◽  
Peng Zhan ◽  
Hui Wang ◽  
...  

In this work, PMA@NH2-MIL-68(Rh) with a mangosteen spherical structure was successfully synthesized by a hydrothermal method for the photocatalytic reduction of carbon dioxide. The electronic structure and morphology of the...


Sign in / Sign up

Export Citation Format

Share Document