Selective photocatalytic reduction CO2 to CH4 on ultrathin TiO2 nanosheet via coordination activation

Wang, Zhiwen; Wan, Qiang; Shi, Yingzhang; Kang, Yueyue; Zhu, Shengli; Lin, Sen; Wu, Ling

doi:10.1016/j.apcatb.2021.120000

Cited by 114 publications

(33 citation statements)

References 63 publications

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“…[ 15,73–75 ] CO 2 − can be converted to CO via reaction with H + (Equation ()) or self‐recombination (Equation ()) or immediate deactivation by the restoration of V O sites (Equation ()). Moreover, the abundance of Ti 3+ plays an important role in the production and selectivity of CH 4 , [ 76 ] which might be the reason for the higher production of CH 4 over CO.

B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2} + U V - v i s - N I R (h ν) \to ({normale}^{-}) B {normali}_{2} {normalS}_{3} a n d M o {normalS}_{2} + ({normalh}^{+}) B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2}

B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2} + V i s - N I R (h ν) \to ({normale}^{-}) T i {normalO}_{2} + ({normalh}^{+}) B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2}

…”

Section: Resultsmentioning

confidence: 99%

Construction of Bi₂S₃/TiO₂/MoS₂ S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO₂ Reduction

et al. 2021

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Switching between the redox potential of an appropriate semiconductor heterostructure could show critical applications in selective CO2 reduction. Designing a semiconductor photocatalyst with a wavelength‐dependent response is an effective strategy for regulating the direction of electron flow and tuning the redox potential. Herein, the switching mechanism between two charge migration pathways and redox potentials in a Bi2S3/TiO2/MoS2 heterostructure by regulating the light wavelength is achieved. In situ irradiated X‐ray photoelectron spectroscopy (ISI‐XPS), electron spin resonance (ESR), photoluminescence (PL), and experimental scavenger analyses prove that the charge transport follows the S‐scheme approach under UV–vis–NIR irradiation and the heterojunction approach under vis–NIR irradiation, confirming the switchable feature of the Bi2S3/TiO2/MoS2 heterostructure. This switchable feature leads to the reduction of CO2 molecules to CH3OH and C2H5OH under UV–vis–NIR irradiation, while CH4 and CO are produced under Vis–NIR irradiation. Interestingly, the apparent quantum efficiency of the optimal composite at λ = 600 nm is 4.23%. This research work presents an opportunity to develop photocatalysts with switchable charge transport and selective CO2 reduction.

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B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2} + U V - v i s - N I R (h ν) \to ({normale}^{-}) B {normali}_{2} {normalS}_{3} a n d M o {normalS}_{2} + ({normalh}^{+}) B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2}

B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2} + V i s - N I R (h ν) \to ({normale}^{-}) T i {normalO}_{2} + ({normalh}^{+}) B {normali}_{2} {normalS}_{3} / T i {normalO}_{2} / M o {normalS}_{2}

…”

Section: Resultsmentioning

confidence: 99%

Construction of Bi₂S₃/TiO₂/MoS₂ S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO₂ Reduction

et al. 2021

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“…So far, many photocatalysts have been developed, such as g-C 3 N 4 , , TiO 2 , − BiOI 1– x , ZnIn 2 S 4 , , etc. Thereinto, metal sulfides have become one of the highly expanded alternative photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

3D/0D Cu₃SnS₄/CeO₂ Heterojunction Photocatalyst with Dual Redox Pairs Synergistically Promotes the Photocatalytic Reduction of CO₂

et al. 2022

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As an inexpensive bimetallic sulfide with a narrow band gap, Cu3SnS4 has been widely used in solar-energy-driven catalytic reactions. However, the traditional tetragonal Cu3SnS4 has the inherent defect of fewer surface active sites and poor photogenerated carrier transport performance, which requires further modification to improve the CO2 photocatalytic reduction performance of tetragonal Cu3SnS4. In this work, the Cu3SnS4/CeO2 binary composites with dual redox pairs of Ce4+/Ce3+ and Cu2+/Cu+ were successfully designed and prepared via a simple solvothermal method as a bridge for the synthesis of composite materials. A series of characterizations, such as X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), photocurrent (PC), electrochemical impedance spectroscopy (EIS), etc., have confirmed that dual redox pairs and heterojunction synergistically improve the photochemical properties of hybrid Cu3SnS4/CeO2. Because of the unique three-dimensional/zero-dimensional (3D/0D) hierarchical structure of Cu3SnS4/CeO2, the splendid light absorption characteristic of Cu3SnS4 was retained, and the specific surface area of CC1 composite was improved. In addition, the water static contact angle experiments showed that the hydrophilicity of composites is inhibited. As a consequence, the fabricated CC1 composite with dual redox pairs acquires CO evolution that is 2.63 times greater than that observed for pristine Cu3SnS4. The innovative study will provide a feasible orientation for the field of solar energy-driven CO2 reduction reaction.

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“…4,5 Enormous efforts have been dedicated to develop efficient semiconductor photocatalysts for CO 2 reduction. 6 Typical inorganic semiconductor photocatalysts (e.g., TiO 2 , 7 Bi 2 MoO 6 , 8 BiOX, 9 etc.) have been widely investigated and proven to be efficient for CO 2 reduction; however, there still remain several intrinsic drawbacks limiting their photocatalytic activities, including limited visible-light harvesting, difficulties in tuning the structures and high costs of raw materials.…”

Section: Introductionmentioning

confidence: 99%

TiO₂-Modulated tetra(4-carboxyphenyl)porphyrin/perylene diimide organic Z-scheme nano-heterojunctions for efficient visible-light catalytic CO₂ reduction

et al. 2022

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Selective photocatalytic reduction CO2 to CH4 on ultrathin TiO2 nanosheet via coordination activation

Cited by 114 publications

References 63 publications

Construction of Bi₂S₃/TiO₂/MoS₂ S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO₂ Reduction

Construction of Bi₂S₃/TiO₂/MoS₂ S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO₂ Reduction

3D/0D Cu₃SnS₄/CeO₂ Heterojunction Photocatalyst with Dual Redox Pairs Synergistically Promotes the Photocatalytic Reduction of CO₂

TiO₂-Modulated tetra(4-carboxyphenyl)porphyrin/perylene diimide organic Z-scheme nano-heterojunctions for efficient visible-light catalytic CO₂ reduction

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Selective photocatalytic reduction CO2 to CH4 on ultrathin TiO2 nanosheet via coordination activation

Cited by 114 publications

References 63 publications

Construction of Bi2S3/TiO2/MoS2 S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO2 Reduction

Construction of Bi2S3/TiO2/MoS2 S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO2 Reduction

3D/0D Cu3SnS4/CeO2 Heterojunction Photocatalyst with Dual Redox Pairs Synergistically Promotes the Photocatalytic Reduction of CO2

TiO2-Modulated tetra(4-carboxyphenyl)porphyrin/perylene diimide organic Z-scheme nano-heterojunctions for efficient visible-light catalytic CO2 reduction

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Construction of Bi₂S₃/TiO₂/MoS₂ S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO₂ Reduction

Construction of Bi₂S₃/TiO₂/MoS₂ S‐Scheme Heterostructure with a Switchable Charge Migration Pathway for Selective CO₂ Reduction

3D/0D Cu₃SnS₄/CeO₂ Heterojunction Photocatalyst with Dual Redox Pairs Synergistically Promotes the Photocatalytic Reduction of CO₂

TiO₂-Modulated tetra(4-carboxyphenyl)porphyrin/perylene diimide organic Z-scheme nano-heterojunctions for efficient visible-light catalytic CO₂ reduction