Exceptional photocatalytic activities for CO2 conversion on Al O bridged g-C3N4/α-Fe2O3 z-scheme nanocomposites and mechanism insight with isotopesZ

Wang, Jinshuang; Qin, Chuanli; Wang, Hongjian; Chu, Mingna; Zada, Amir; Zhang, Xuliang; Li, Jiadong; Raziq, Fazal; Qu, Yang; Jing, Liqiang

doi:10.1016/j.apcatb.2017.09.042

Cited by 153 publications

(65 citation statements)

References 51 publications

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“…The O 1s spectra of all samples are fitted into two contributions located at 529.5 and 531.6 eV, which are attributed to crystal lattice oxygen (O L ) and hydroxyl oxygen (OH), respectively. The major peak at 529.07 eV indicates a normal state of O 2− and M–O attachment in the fabricated samples …”

Section: Resultsmentioning

confidence: 98%

Enhanced photodegradation of methylene blue with alkaline and transition‐metal ferrite nanophotocatalysts under direct sun light irradiation

Ali

Zada

Zahid

et al. 2018

J Chinese Chemical Soc

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It is highly desired to synthesize low‐cost photocatalysts for the degradation of colored dyes to safeguard our environment for the future generations. Here, we report an extremely efficient and low‐cost synthesis of alkaline earth and transition‐metal ferrite photocatalysts (MgFe2O4, CaFe2O4, BaFe12O19, CuFe2O4, and ZnFe2O4) from their chloride salts and their applications for the degradation of methylene blue (MB) dye under UV–visible and direct sunlight irradiation. The as‐prepared photocatalysts displayed enhanced photoactivities under both conditions of irradiation. After calcination at 600°C, the photocatalytic degradation increased significantly, and 96 and 85% MB was removed with ZnFe2O4 under UV–visible and direct sunlight irradiation, respectively. Moreover, large amounts of hydroxyl free radicals were produced under both irradiation conditions, which participated in the degradation of MB. The enhanced photodegradation activities of these photocatalysts are attributed to their extended visible light absorption and low bandgaps. This work will provide a feasible route to the synthesis of efficient and low‐cost photocatalysts to utilize sunlight for environmental remediation.

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Section: Resultsmentioning

confidence: 98%

Enhanced photodegradation of methylene blue with alkaline and transition‐metal ferrite nanophotocatalysts under direct sun light irradiation

Ali

Zada

Zahid

et al. 2018

J Chinese Chemical Soc

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“…In another report, He et al synthesized ZnO/g‐C 3 N 4 composite photocatalyst through the single step synthesis process by employing (Zn(OOCCH 3 ) 2 and urea precursors . An effectively optimized ratio of Al‐O bridged g‐C 3 N 4 /α‐Fe 2 O 3 Z‐scheme photocatalyst has been fabricated by Wang et al via simple incipient wet‐chemical synthesis process through the adjustment of the mass ratios between as‐prepared α‐Fe 2 O 3 nanoparticles and g‐C 3 N 4 in the presence of AlCl 3 precursor . The prepared nanocomposites displayed a high conversion of CO 2 to CH 4 (≈5.0 µmol g −1 h −1 ) and CO (≈24 µmol g −1 h −1 ) in the presence of water and visible‐light irradiation, whereas, only α‐Fe 2 O 3 gives a poor activity for the conversion of CO 2 to CO (≈5.7 µmol g −1 h −1 ), and CH 4 (≈0.3 µmol g −1 h −1 ), respectively.…”

Section: Co2 Conversion With Nanostructured Carbon Nitridesmentioning

confidence: 99%

Nanostructured Carbon Nitrides for CO₂ Capture and Conversion

et al. 2019

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Carbon nitride (CN), a 2D material composed of only carbon (C) and nitrogen (N), which are linked by strong covalent bonds, has been used as a metal-devoid and visible-light-active photocatalyst owing to its magnificent optoelectronic and physicochemical properties including suitable bandgap, adjustable energy-band positions, tailor-made surface functionalities, low cost, metal-free nature, and high thermal, chemical, and mechanical stabilities. CN-based materials possess a lot of advantages over conventional metal-based inorganic photocatalysts including ease of synthesis and processing, versatile functionalization or doping, flexibility for surface engineering, low cost, sustainability, and recyclability without any leaching of toxic metals from photocorrosion. Carbon nitrides and their hybrid materials have emerged as attractive candidates for CO 2 capture and its reduction into clean and green low-carbon fuels and valuable chemical feedstock by using sustainable and intermittent renewable energy sources of sunlight and electricity through the heterogeneous photo(electro) catalysis. Here, the latest research results in this field are summarized, including implementation of novel functionalized nanostructured CNs and their hybrid heterostructures in meeting the stringent requirements to raise the efficiency of the CO 2 reduction process by using state-of-the-art photocatalysis, electrocatalysis, photoelectrocatalysis, and feedstock reactions. The research in this field is primarily focused on advancement in the synthesis of nanostructured and functionalized CN-based hybrid heterostructured materials. More importantly, the recent past has seen a surge in studies focusing significantly on exploring the mechanism of their application perspectives, which include the behavior of the materials for the absorption of light, charge separation, and pathways for the transport of CO 2 during the reduction process.

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“…However, these methods require highly costly and controlled operational environment and huge labor under normal conditions. On the other hand, different pollutants removal technologies such as adsorption, coagulation, and electrochemical methods have their own shortcomings and did not receive much popularity in the purification of the environment (Zhao et al, 2015;Gautam et al, 2016;Li et al, 2016;Ali et al, 2018b;Wang et al, 2018;Ali S. et al, 2019). Therefore, modern techniques are urgently required to address energy and environmental issues properly with the least operational cost and time.…”

Section: Introductionmentioning

confidence: 99%

Accelerating Photocatalytic Hydrogen Production and Pollutant Degradation by Functionalizing g-C3N4 With SnO2

et al. 2020

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Energy crises and environmental pollution are two serious threats to modern society. To overcome these problems, graphitic carbon nitride (g-C 3 N 4 ) nanosheets were fabricated and functionalized with SnO 2 nanoparticles to produce H 2 from water splitting and degrade 2-chlorophenol under visible light irradiation. The fabricated samples showed enhanced photocatalytic activities for both H 2 evolution and pollutant degradation as compared to bare g-C 3 N 4 and SnO 2 . These enhanced photoactivities are attributed to the fast charge separation as the excited electrons transfer from g-C 3 N 4 to the conduction band of SnO 2 . This enhanced charge separation has been confirmed by the photoluminescence spectra, steady state surface photovoltage spectroscopic measurement, and formed hydroxyl radicals. It is believed that this work will provide a feasible route to synthesize photocatalysts for improved energy production and environmental purification.

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Exceptional photocatalytic activities for CO2 conversion on Al O bridged g-C3N4/α-Fe2O3 z-scheme nanocomposites and mechanism insight with isotopesZ

Cited by 153 publications

References 51 publications

Enhanced photodegradation of methylene blue with alkaline and transition‐metal ferrite nanophotocatalysts under direct sun light irradiation

Enhanced photodegradation of methylene blue with alkaline and transition‐metal ferrite nanophotocatalysts under direct sun light irradiation

Nanostructured Carbon Nitrides for CO₂ Capture and Conversion

Accelerating Photocatalytic Hydrogen Production and Pollutant Degradation by Functionalizing g-C3N4 With SnO2

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Exceptional photocatalytic activities for CO2 conversion on Al O bridged g-C3N4/α-Fe2O3 z-scheme nanocomposites and mechanism insight with isotopesZ

Cited by 153 publications

References 51 publications

Enhanced photodegradation of methylene blue with alkaline and transition‐metal ferrite nanophotocatalysts under direct sun light irradiation

Enhanced photodegradation of methylene blue with alkaline and transition‐metal ferrite nanophotocatalysts under direct sun light irradiation

Nanostructured Carbon Nitrides for CO2 Capture and Conversion

Accelerating Photocatalytic Hydrogen Production and Pollutant Degradation by Functionalizing g-C3N4 With SnO2

Contact Info

Product

Resources

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Nanostructured Carbon Nitrides for CO₂ Capture and Conversion