Structural engineering of 3D hierarchical Cd0.8Zn0.2S for selective photocatalytic CO2 reduction

“…When the sample was exposed to light radiation, many intermediate products appeared (Fig. 7(d)), including -OCH3 (1048 cm −1 ), HCO3 − (1198 and 1244 cm −1 ), HCOO − (1337 and 1541 cm −1 ), m-CO3 2− (1375 cm −1 ), HCHO (1607 cm −1 ), and b-CO3 2− (1648 cm −1 ) [43][44][45]. Among them, the peak intensity of HCOO − first increased and then decreased, indicating that COOH* generated CO [46].…”

Section: Resultsmentioning

confidence: 99%

Construction of efficient active sites through cyano-modified graphitic carbon nitride for photocatalytic CO2 reduction

Yue

Zhou

et al. 2021

Chinese Journal of Catalysis

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The active site amount of photocatalysts, being the key factors in photocatalytic reactions, directly affects the photocatalytic performance of the photocatalyst. Pristine graphitic carbon nitride (g-C3N4) exhibits moderate photocatalytic activity due to insufficient active sites. In this study, cyano-modified porous g-C3N4 nanosheets (MCN-0.5) were synthesized through molecular self-assembly and alkali-assisted strategies. The cyano group acted as the active site of the photocatalytic reaction, because the good electron-withdrawing property of the cyano group promoted carrier separation. Benefiting from the effect of the active sites, MCN-0.5 exhibited significantly enhanced photocatalytic activity for CO2 reduction under visible light irradiation. Notably, the photocatalytic activity of MCN-0.5 was significantly reduced when the cyano groups were removed by hydrochloric acid (HCl) treatment, further verifying the role of cyano groups as active sites. The photoreduction of Pt nanoparticles provided an intuitive indication that the introduction of cyano groups provided more active sites for the photocatalytic reaction. Furthermore, the controlled experiments showed that g-C3N4 grafted with cyano groups using melamine as the precursor exhibited enhanced photocatalytic activity, which proved the versatility of the strategy for enhancing the activity of g-C3N4 via cyano group modification. In situ diffuse reflectance infrared Fourier transform spectroscopy and theoretical calculations were used to investigate the mechanism of enhanced photocatalytic activity for CO2 reduction by cyano-modified g-C3N4. This work provides a promising route for promoting efficient solar energy conversion by designing active sites in photocatalysts.

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“…In this work, thermally coupled photocatalysis yielded the enhanced evolution of H 2 side products over Pt (4.06 nm)/TiO 2 and promoted H 2 splitting over Pt (2.33 nm)/TiO 2 , which are seldom observed in conventional Pt/TiO 2 photocatalysis. Additionally, some important reports are also provided for better understanding of this field 129‐132 . But then again, artificial photosynthesis is a fundamental yet far significant project, exerting profound impact on the future lives of all human beings.…”

Section: Discussionmentioning

confidence: 99%

Engineering approach toward catalyst design for solar photocatalytic CO ₂ reduction: A critical review

Zhang

et al. 2021

Int J Energy Res

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Summary Solar‐driven converting CO2 to value‐added chemicals can not only address the ever‐growing energy crisis, but also simultaneously mitigate CO2 emission. Although much progress has been made in the last decade, it still remains great challenge to achieve the efficient reduction of CO2 with desirable productivity and high product selectivity because CO2 is a thermodynamically stable and inert molecule with large bond energy. Design and synthesis of efficient catalyst play a pivotal role in promoting the activity and selectivity of photocatalytic CO2 reduction. Apart from the active sites engineering, manipulation of the charge separation and light harvesting efficiency or prolonging the lifetime of photogenerated carriers also greatly matters. Consequently, this review summarizes recent advances in photocatalyst design for CO2 conversion from two major aspects, namely active sites engineering and carriers lifespan prolonging. Firstly, we sort out the fundamental principles and merits of artificial photosynthesis in order to provide readers with a current snapshot of this rapidly developed field. Subsequently, various catalyst engineering strategies, including doping, alloying, Z‐scheme structure construction, are discussed in detail. Finally, some challenging issues as well as insights into the future development of artificial photosynthesis are presented.

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Structural engineering of 3D hierarchical Cd0.8Zn0.2S for selective photocatalytic CO2 reduction

Cited by 155 publications

References 54 publications

Visible light responsive metalloporphyrin-sensitized TiO₂ nanotube arrays for artificial photosynthesis of methane

Visible light responsive metalloporphyrin-sensitized TiO₂ nanotube arrays for artificial photosynthesis of methane

Construction of efficient active sites through cyano-modified graphitic carbon nitride for photocatalytic CO2 reduction

Engineering approach toward catalyst design for solar photocatalytic CO ₂ reduction: A critical review

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Structural engineering of 3D hierarchical Cd0.8Zn0.2S for selective photocatalytic CO2 reduction

Cited by 155 publications

References 54 publications

Visible light responsive metalloporphyrin-sensitized TiO2 nanotube arrays for artificial photosynthesis of methane

Visible light responsive metalloporphyrin-sensitized TiO2 nanotube arrays for artificial photosynthesis of methane

Construction of efficient active sites through cyano-modified graphitic carbon nitride for photocatalytic CO2 reduction

Engineering approach toward catalyst design for solar photocatalytic CO 2 reduction: A critical review

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Product

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Visible light responsive metalloporphyrin-sensitized TiO₂ nanotube arrays for artificial photosynthesis of methane

Visible light responsive metalloporphyrin-sensitized TiO₂ nanotube arrays for artificial photosynthesis of methane

Engineering approach toward catalyst design for solar photocatalytic CO ₂ reduction: A critical review