Enhancement of photocatalytic CO2 reduction for novel Cd0.2Zn0.8S@Ti3C2 (MXenes) nanocomposites

Saeed, Aamir; Chen, Wen; Shah, Abdul Hakim; Zhang, Yuyao; Mehmood, Ikhtisham; Liu, Yueli

doi:10.1016/j.jcou.2021.101501

Cited by 46 publications

(17 citation statements)

References 44 publications

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“…In recent years, chalcogenides have been extensively used in photocatalytic CO 2 reduction by virtue of their narrow band gap and negative conduction band in the energy levels. − Among the chalcogenides, ZnS, CdS, MoS 2 , and Cd x Zn 1– x S have been often reported. Moreover, a Cd x Zn 1– x S solid solution has been widely used in the hydrogen evolution and photodegradation of effluents due to its tunable band structure and edge position of the absorption band. − Meanwhile, research on the photocatalytic CO 2 reduction has been receiving attention from people. , Many results demonstrated that the prepared Cd x Zn 1– x S exhibited the best photocatalytic performance while the molar ratio of Cd/Zn was 1 . However, the charge transfer ability of Cd 0.5 Zn 0.5 S (CZS) was greatly limited in consequence of the reintegration of photogenerated electron/hole pairs over CZS and its small specific surface area, so as to result in its low photocatalytic activity for CO 2 reduction.…”

Section: Introductionmentioning

confidence: 99%

“…13−15 Meanwhile, research on the photocatalytic CO 2 reduction has been receiving attention from people. 16,17 Many results demonstrated that the prepared Cd x Zn 1−x S exhibited the best photocatalytic performance while the molar ratio of Cd/ Zn was 1. 18 However, the charge transfer ability of Cd 0.5 Zn 0.5 S (CZS) was greatly limited in consequence of the reintegration of photogenerated electron/hole pairs over CZS and its small specific surface area, 19 so as to result in its low photocatalytic activity for CO 2 reduction.…”

Section: Introductionmentioning

confidence: 99%

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Cd_0.5Zn_0.5S/CoWO₄ Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO₂ Reduction

Zhou

Yang

et al. 2021

Inorg. Chem.

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The construction of a phase junction photocatalyst can significantly enhance the photocatalytic performance with high selectivity for CO 2 reduction. In this study, an Sscheme junction Cd 0.5 Zn 0.5 S/CoWO 4 semiconductor with the coupling of a twin crystal Cd 0.5 Zn 0.5 S homojunction and CoWO 4 was designed through a hydrothermal method, which could convert CO 2 to CO with high efficiency under visible-light illumination. Cd 0.5 Zn 0.5 S− 10%CoWO 4 exhibited the optimal performance and its CO yield and selectivity were up to 318.68 μmol•g −1 and 95.90%, respectively, which were 4.54 and 1.62 times higher than that of twin crystal Cd 0.5 Zn 0.5 S. Moreover, the Cd 0.5 Zn 0.5 S homojunction with a zinc-blende and wurtzite phase and the S-scheme phase junction of Cd 0.5 Zn 0.5 S/CoWO 4 enhanced the property of CO 2 adsorption and accelerated the detachment of photogenerated carriers. The combination of photogenerated holes in Cd 0.5 Zn 0.5 S and the electrons of CoWO 4 can retain the reduction sites to improve photocatalytic performance. This study provides a neoteric concept and reference for the construction of the S-scheme phase junction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cd_0.5Zn_0.5S/CoWO₄ Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO₂ Reduction

Zhou

Yang

et al. 2021

Inorg. Chem.

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“…Hence, MXenes are widely used as cocatalyst along with several photocatalyst materials for photocatalytic reduction of CO 2 (Table ). ,,,− ,− When MXene and a semiconductor photocatalyst come into contact, a Schottky junction is established and photogenerated electrons easily flow from the semiconductor to metallic conductive MXene, enhancing charge carrier separation …”

Section: Co2 Reduction Activitymentioning

confidence: 99%

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

et al. 2022

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Photocatalytic water splitting, CO2 reduction, and pollutant degradation have emerged as promising strategies to remedy the existing environmental and energy crises. However, grafting of expensive and less abundant noble-metal cocatalysts on photocatalyst materials is a mandatory practice to achieve enhanced photocatalytic performance owing to the ability of the cocatalysts to extract electrons efficiently from the photocatalyst and enable rapid/enhanced catalytic reaction. Hence, developing highly efficient, inexpensive, and noble-metal-free cocatalysts composed of earth-abundant elements is considered as a noteworthy step toward considering photocatalysis as a more economical strategy. Recently, MXenes (two-dimensional (2D) transition-metal carbides, nitrides, and carbonitrides) have shown huge potential as alternatives for noble-metal cocatalysts. MXenes have several excellent properties, including atomically thin 2D morphology, metallic electrical conductivity, hydrophilic surface, and high specific surface area. In addition, they exhibit Gibbs free energy of intermediate H atom adsorption as close to zero and less than that of a commercial Pt-based cocatalyst, a Fermi level position above the H2 generation potential, and an excellent ability to capture and activate CO2 molecules. Therefore, there is a growing interest in MXene-based photocatalyst materials for various photocatalytic events. In this review, we focus on the recent advances in the synthesis of MXenes with 2D and 0D morphologies, the stability of MXenes, and MXene-based photocatalysts for H2 evolution, CO2 reduction, and pollutant degradation. The existing challenges and the possible future directions to enhance the photocatalytic performance of MXene-based photocatalysts are also discussed.

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“…Higher electrical conductivity was also found in the low addition of Ti 3 C 2 T x MXene, compared to the addition of other 2D nanomaterials, such as MoS 2 , which contributed to higher catalytic activity [54]. Several reports have also shown the combination of MXenes with other photocatalyst materials, such as g-C 3 N 4 [53], perovskite materials (Cs 3 Bi 2 Br 9 , FAPbBr 3 , CsPbBr 3 , and Cs 2 AgBiBr 6 ) [56][57][58][59], layered double hydroxides (NiAl, Co-Co, and Co 2 Al 0.95 La 0.05 ) [60][61][62], Bi-based photocatalysts (BiOX (X = Cl, Br, I), Bi 2 XO 6 (X = W, Mo), and hybrid Bi 2 O 2 SiO 3 ) [50,63,64], and metal oxides and metal sulfides (TiO 2 , CeO 2 , InVO 4 , CdS, Cd 0.2 Zn 0.8 S, and ZnIn 2 S 4 ) [9,49,53,[65][66][67][68][69].…”

Section: Mxene-based Heterostructuresmentioning

confidence: 99%

MXene-Based Photocatalysts and Electrocatalysts for CO2 Conversion to Chemicals

Amrillah

Supandi

Puspasari

et al. 2022

Trans. Tianjin Univ.

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The interest in CO2 conversion to value-added chemicals and fuels has increased in recent years as part of strategic efforts to mitigate and use the excessive CO2 concentration in the atmosphere. Much attention has been given to developing two-dimensional catalytic materials with high-efficiency CO2 adsorption capability and conversion yield. While several candidates are being investigated, MXenes stand out as one of the most promising catalysts and co-catalysts for CO2 reduction, given their excellent surface functionalities, unique layered structures, high surface areas, rich active sites, and high chemical stability. This review aims to highlight research progress and recent developments in the application of MXene-based catalysts for CO2 conversion to value-added chemicals, paying special attention to photoreduction and electroreduction. Furthermore, the underlying photocatalytic and electrocatalytic CO2 conversion mechanisms are discussed. Finally, we provide an outlook for future research in this field, including photoelectrocatalysis and photothermal CO2 reduction.

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Enhancement of photocatalytic CO2 reduction for novel Cd0.2Zn0.8S@Ti3C2 (MXenes) nanocomposites

Cited by 46 publications

References 44 publications

Cd_0.5Zn_0.5S/CoWO₄ Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO₂ Reduction

Cd_0.5Zn_0.5S/CoWO₄ Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO₂ Reduction

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

MXene-Based Photocatalysts and Electrocatalysts for CO2 Conversion to Chemicals

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Enhancement of photocatalytic CO2 reduction for novel Cd0.2Zn0.8S@Ti3C2 (MXenes) nanocomposites

Cited by 46 publications

References 44 publications

Cd0.5Zn0.5S/CoWO4 Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO2 Reduction

Cd0.5Zn0.5S/CoWO4 Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO2 Reduction

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

MXene-Based Photocatalysts and Electrocatalysts for CO2 Conversion to Chemicals

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Product

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Cd_0.5Zn_0.5S/CoWO₄ Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO₂ Reduction

Cd_0.5Zn_0.5S/CoWO₄ Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO₂ Reduction