Tailoring the properties of g-C3N4 with CuO for enhanced photoelectrocatalytic CO2 reduction to methanol

Jiang, Xiao Xia; Hu, Xiu De; Tarek, Mostafa; Saravanan, Prabhu; Alqadhi, Radfan; Chin, Sim Yee; Khan, Maksudur R.

doi:10.1016/j.jcou.2020.101222

Cited by 62 publications

(28 citation statements)

References 61 publications

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“…The peak observed at 402.40 eV was attributed to bridged N-(C) 3 . The peak at 404.00 eV was associated with the N atom in the amino group (N-H) [44].…”

Section: Ftir Analysismentioning

confidence: 99%

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

et al. 2022

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Photocatalytic membranes possessing both photocatalytic and solid-liquid separation capabilities were developed. These materials are based on ternary 1% CuO/TiO2@GCN (1:9) embedded on cellulose acetate (CA) via the phase inversion method. The CA membranes containing 0.1, 0.3 and 0.5 wt% of 1% CuO/TiO2@GCN (1:9) (CTG–100, CTG–300 and CTG–500) were fabricated. The deposition of 1% CuO/TiO2@GCN (1:9) onto the CA membranes and the consequential changes in the materials’ properties were investigated with various characterization techniques. For instance, PXRD, FTIR, and XPS analysis provided evidence that photocatalytic membranes were formed. Electron microscopy and EDX were then used to visualize the photocatalytic membranes and show that the photocatalyst (1% CuO/TiO2@GCN (1:9)) was well dispersed onto the CA membrane. On the other hand, the properties of the photocatalytic membranes were scrutinized, where it was found that the membranes had a sponge-like morphology and that was significantly less hydrophilic compared to neat CA. The removal of KP in water using CTG–500 exhibited over 94% efficiency, while 38% for neat CA was achieved. Water permeability flux improved with increasing 1% CuO/TiO2@GCN (1:9) and hydrophilicity of the membranes. The electrical energy consumption was calculated and determined to be significantly lower than that of the CA membrane. The CTG–500 membrane after every cycle showed self-cleaning ability after operation in drinking and groundwater.

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“…The peak observed at 402.40 eV was attributed to bridged N-(C) 3 . The peak at 404.00 eV was associated with the N atom in the amino group (N-H) [44].…”

Section: Ftir Analysismentioning

confidence: 99%

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

et al. 2022

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“…[ 3 ] Among various reported approaches, photoelectrochemical (PEC) CO 2 reduction has attracted significant attention due to recent significant development of light harvesting semiconductors for direct solar into chemical energy conversion. [ 4,5 ] Many photocathode materials have been reported to obtain various C1C3 products including CO, [ 6,7 ] HCOOH, [ 8,9 ] methanol, [ 10,11 ] ethanol, [ 12,13 ] and propanol. [ 14 ] However, over the past decades, the stumbling block for PEC CO 2 reduction lies in its low efficiency and uncontrolled product selectivity due to the poor light absorption ability, sluggish charge transfer properties, and high overpotential of commonly used photocathode materials, [ 15,16 ] such as Cu 2 O [ 17 ] and ZnTe.…”

Section: Introductionmentioning

confidence: 99%

Accelerating Electron‐Transfer and Tuning Product Selectivity Through Surficial Vacancy Engineering on CZTS/CdS for Photoelectrochemical CO₂ Reduction

Zhou

Sun

Huang

et al. 2021

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Copper‐based chalcogenides have been considered as potential photocathode materials for photoelectrochemical (PEC) CO2 reduction due to their excellent photovoltaic performance and favorable conduction band alignment with the CO2 reduction potential. However, they suffer from low PEC efficiency due to the sluggish charge transfer kinetics and poor selectivity, resulting from random CO2 reduction reaction pathways. Herein, a facile heat treatment (HT) of a Cu2ZnSnS4(CZTS)/CdS photocathode is demonstrated to enable significant improvement in the photocurrent density (−0.75 mA cm−2 at −0.6 V vs RHE), tripling that of pristine CZTS, as a result of the enhanced charge transfer and promoted band alignment originating from the elemental inter‐diffusion at the CZTS/CdS interface. In addition, rationally regulated CO2 reduction selectivity toward CO or alcohols can be obtained by tailoring the surficial sulfur vacancies by HT in different atmospheres (air and nitrogen). Sulfur vacancies replenished by O‐doping is shown to favor CO adsorption and the CC coupling pathway, and thereby produce methanol and ethanol, whilst the CdS surface with more S vacancies promotes CO desorption capability with higher selectivity toward CO. The strategy in this work rationalizes the interface charge transfer optimization and surface vacancy engineering simultaneously, providing a new insight into PEC CO2 reduction photocathode design.

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“…The mechanism for the PEC CO 2 RR on the CuO/g‐C 3 N 4 heterostructure was seen in Figure 29D, where the photogenerated electrons and holes from g‐C 3 N 4 transferred to the CB and VB of CuO, respectively. Thus, the applied external bias aids to separate the photogenerated electron–hole pairs efficiently through the interface 309 …”

Section: External‐field‐assisted Photocatalysis On Carbon Nitridementioning

confidence: 99%

Section: External‐field‐assisted Photocatalysis On Carbon Nitridementioning

confidence: 99%

Solar‐powered chemistry: Engineering low‐dimensional carbon nitride‐based nanostructures for selective CO₂ conversion to C₁C₂ products

Foo

Ong

2022

InfoMat

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CO2 capture and conversion has been prospected as an auspicious technology to simultaneously tackle the rise in global CO2 emission and produce value‐added fuels with the goal of accomplishing carbon neutrality. A sustainable route to achieve this is via the utilization of solar energy, thereby harnessing the abundant and nonexhaustive resource to shift our reliance away from rapidly depleting fossil fuels. Graphitic carbon nitride (g‐C3N4) and its allotrope have earned its rank as a fascinating metal‐free photocatalyst due to its superior stability, high surface‐area‐to‐volume ratio, and tunable surface engineering. By leveraging these properties, robust carbon nitride‐based nanostructures are engineered for photocatalytic CO2 conversion to energy‐rich C1C2 product, which is indispensable in the chemical industry. Thus, this review presents the latest panorama of experimental and computational research on tuning the local electronic, surface chemical coordination environment, charge dynamics and optical properties of low‐dimensional carbon nitride and its allotropes toward highly selective and efficient CO2 photoconversion. To name a few, structural engineering, point‐defect engineering, heterojunction construction, and cocatalyst loading. To advance this frontier, critical insights are elucidated to establish the structure‐performance relationship and unravel primary factors dictating the selectivity of C1C2 molecules from CO2 reduction. External‐field assisted photocatalysis such as with electric (photoelectro‐) and heat (photothermal) is discussed to uncover the synergistic contributions that drive the development in photochemistry. Last, future challenges and prospects are outlined for the potential application of solar‐driven CO2 conversion, along with the scale‐up strategy from the economic viewpoint toward the rational development of high‐efficiency carbon nitride catalysts.

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Tailoring the properties of g-C3N4 with CuO for enhanced photoelectrocatalytic CO2 reduction to methanol

Cited by 62 publications

References 61 publications

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

Accelerating Electron‐Transfer and Tuning Product Selectivity Through Surficial Vacancy Engineering on CZTS/CdS for Photoelectrochemical CO₂ Reduction

Solar‐powered chemistry: Engineering low‐dimensional carbon nitride‐based nanostructures for selective CO₂ conversion to C₁C₂ products

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Tailoring the properties of g-C3N4 with CuO for enhanced photoelectrocatalytic CO2 reduction to methanol

Cited by 62 publications

References 61 publications

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

Energy-Efficient CuO/TiO2@GCN Cellulose Acetate-Based Membrane for Concurrent Filtration and Photodegradation of Ketoprofen in Drinking and Groundwater

Accelerating Electron‐Transfer and Tuning Product Selectivity Through Surficial Vacancy Engineering on CZTS/CdS for Photoelectrochemical CO2 Reduction

Solar‐powered chemistry: Engineering low‐dimensional carbon nitride‐based nanostructures for selective CO2 conversion to C1C2 products

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Product

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Accelerating Electron‐Transfer and Tuning Product Selectivity Through Surficial Vacancy Engineering on CZTS/CdS for Photoelectrochemical CO₂ Reduction

Solar‐powered chemistry: Engineering low‐dimensional carbon nitride‐based nanostructures for selective CO₂ conversion to C₁C₂ products