Ultrasonically-assisted surface modified TiO2/rGO/CeO2 heterojunction photocatalysts for conversion of CO2 to methanol and ethanol

Seeharaj, Panpailin; Kongmun, Panyata; Paiplod, Piyalak; Prakobmit, Saowanee; Sriwong, Chaval; Kim-Lohsoontorn, Pattaraporn; Vittayakorn, Naratip

doi:10.1016/j.ultsonch.2019.104657

Cited by 46 publications

(27 citation statements)

References 51 publications

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“…The precious metals, Ag, Pd, and Cu, can promote the light absorption ability of the composite and provide a transition state for photoelectrons to remain separated from holes. 3 …”

Section: Resultsmentioning

confidence: 99%

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO₂ to Ethanol

et al. 2021

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We utilized a one-step hydrothermal process for the synthesis of precious metal-doped titanium dioxide (TiO 2 )/graphene oxide (GO) composites. The metal-doped TiO 2 /GO composites, including silver–TiO 2 /GO (Ag–TiO 2 /GO), palladium–TiO 2 /GO (Pd–TiO 2 /GO), and copper–TiO 2 /GO (Cu–TiO 2 /GO), were synthesized by mixing a metal precursor, titanium butoxide, and graphene oxide in a water–ethanol mixture in an autoclave hydrothermal reactor. The photocatalytic performance of the composites was tested in the photoreduction of carbon dioxide (CO 2 ) to ethanol. Ag–TiO 2 /GO, Pd–TiO 2 /GO, and Cu–TiO 2 /GO exhibited an ethanol production rate of 109, 125, and 233 μmol/g cat h, respectively. The outstanding performances of Cu–TiO 2 /GO can be attributed to a combined effect of key parameters, including optical band gap, crystallite size, and BET surface area.

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“…The precious metals, Ag, Pd, and Cu, can promote the light absorption ability of the composite and provide a transition state for photoelectrons to remain separated from holes. 3 …”

Section: Resultsmentioning

confidence: 99%

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO₂ to Ethanol

et al. 2021

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“…As each of the aforementioned steps needs to be well optimized to achieve highly active and selective photocatalysts, various structural design methods have been developed for promoting the photocatalytic CO 2 reduction performance, as briefly listed in the following: 1) Construction of nano‐/microstructures strategies can control the morphology, size, and shape of materials, which have substantial advantages for enhancing CO 2 photoreduction activity, such as shortening charge migration pathway, [ 126–128 ] increasing reactive catalytic sites, [ 129–133 ] boosting charge separation as well as extending optical transmission length. [ 134–138 ] 2) Doping and formation of solid solution are two main approaches to tailor the crystalline and band structures of photocatalysts. The alteration in atomic composition bonding and coordination may result in the changes of light absorption, [ 139,140 ] band energy edge level, [ 141–143 ] and charge separation.…”

Section: Overview Of Photocatalysts For Co2 Reductionmentioning

confidence: 99%

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

et al. 2020

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Photocatalytic CO2 reduction attracts substantial interests for the production of chemical fuels via solar energy conversion, but the activity, stability, and selectivity of products were severely determined by the efficiencies of light harvesting, charge migration, and surface reactions. Structural engineering is a promising tactic to address the aforementioned crucial factors for boosting CO2 photoreduction. Herein, a timely and comprehensive review focusing on the recent advances in photocatalytic CO2 conversion based on the design strategies over nano‐/microstructure, crystalline and band structure, surface structure and interface structure is provided, which covers both the thermodynamic and kinetic challenges in CO2 photoreduction process. The key parameters essential for tailoring the size, morphology, porosity, bandgap, surface, or interfacial properties of photocatalysts are emphasized toward the efficient and selective conversion of CO2 into valuable chemicals. New trends and strategies in the structural design to meet the demands for prominent CO2 photoreduction activity are also introduced. It is expected to furnish a comprehensive guideline for inside‐and‐out design of state‐of‐the‐art photocatalysts with well‐defined structures for CO2 conversion.

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“…The clusters of Ni(OH) 2 /Ni can act as electron sinks and stimulate the photo-generated electron separation from TiO 2 to a cluster of Ni(OH) 2 /Ni and toward CO 2 molecules, which can play a vital role as active sites and during the photocatalytic process, reducing photo-excited charge carrier recombination (Figure 24g). Later on, modified TiO 2 /rGO/CeO 2 composite photocatalyst was investigated for CO 2 photoconversion by the ultrasonication method [98].…”

Section: Tio 2 Based Photocatalystsmentioning

confidence: 99%

Recent Advances of Photocatalytic Hydrogenation of CO2 to Methanol

2022

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Constantly increasing hydrocarbon fuel combustion along with high levels of carbon dioxide emissions has given rise to a global energy crisis and environmental alterations. Photocatalysis is an effective technique for addressing this energy and environmental crisis. Clean and renewable solar energy is a very favourable path for photocatalytic CO2 reduction to value-added products to tackle problems of energy and the environment. The synthesis of various products such as CH4, CH3OH, CO, EtOH, etc., has been expanded through the photocatalytic reduction of CO2. Among these products, methanol is one of the most important and highly versatile chemicals widely used in industry and in day-to-day life. This review emphasizes the recent progress of photocatalytic CO2 hydrogenation to CH3OH. In particular, Metal organic frameworks (MOFs), mixed-metal oxide, carbon, TiO2 and plasmonic-based nanomaterials are discussed for the photocatalytic reduction of CO2 to methanol. Finally, a summary and perspectives on this emerging field are provided.

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Ultrasonically-assisted surface modified TiO2/rGO/CeO2 heterojunction photocatalysts for conversion of CO2 to methanol and ethanol

Cited by 46 publications

References 51 publications

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO₂ to Ethanol

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO₂ to Ethanol

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

Recent Advances of Photocatalytic Hydrogenation of CO2 to Methanol

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Ultrasonically-assisted surface modified TiO2/rGO/CeO2 heterojunction photocatalysts for conversion of CO2 to methanol and ethanol

Cited by 46 publications

References 51 publications

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO2 to Ethanol

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO2 to Ethanol

Inside‐and‐Out Semiconductor Engineering for CO2 Photoreduction: From Recent Advances to New Trends

Recent Advances of Photocatalytic Hydrogenation of CO2 to Methanol

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Product

Resources

About

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO₂ to Ethanol

One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO₂ to Ethanol

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends