Internal electric field induced S–scheme heterojunction MoS2/CoAl LDH for enhanced photocatalytic hydrogen evolution

Tao, Junnan; Yu, Xiaohui; Liu, Qinqin; Liu, Guiwu; Tang, Hua

doi:10.1016/j.jcis.2020.10.028

Cited by 178 publications

(71 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance Tao et al. reported that the as‐synthesized CoAl‐LDH/MoS 2 displayed a good stability towards photocatalytic H 2 production and the rate was almost constant in every 4 h [160] . The stability of CoAl−LDH/MoS 2 can be confirmed by XRD characterization, where no considerable distinction in XRD pattern was noticed among the used and fresh catalysts, suggesting the formation of 2D/2D intimate interface among MoS 2 and CoAl−LDH via IEF induced S‐scheme for fast separation of photoinduced electron and hole pairs, which is the main reason for the improved stability of materials.…”

Section: Characterization Techniques Measuring the Stability Of Ldh@graphene And Analogous Heterostructure For Pc/pec Water Splittingmentioning

confidence: 99%

“…In a more perspective manner, Tao et al. studied the extent of interfacial contact interaction in a heterojunction photocatalysts for significant reduction in the recombination of photogenerated exciton pairs [160] . They fabricated 2D/2D CoAl−LDH/MoS 2 via hydrothermal method and explored the existence of an internal electric field (IEF)‐driven S‐scheme mechanism for effective mode of charge separation and performance.…”

Section: Magnifying Mechanism Of Charge Separation Related To Stability Of Ldh@graphene and Analogous Heterostructure Towards Pc/pec Watementioning

confidence: 99%

See 1 more Smart Citation

Recent Progress in LDH@Graphene and Analogous Heterostructures for Highly Active and Stable Photocatalytic and Photoelectrochemical Water Splitting

Nayak

2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

Photocatalytic (PC) and photoelectrochemical (PEC) water splitting is a plethora of green technological process, which transforms copiously available photon energy into valuable chemical energy. With the augmentation of modern civilization, developmental process of novel semiconductor photocatalysts proceeded at a sweltering rate, but the overall energy conversion efficiency of semiconductor photocatalysts in PC/PEC is moderately poor owing to the instability ariseing from the photocorrosion and messy charge configuration. Particularly, layered double hydroxides (LDHs) as reassuring multifunctional photocatalysts, turned out to be intensively investigated owing to the lamellar structure and exceptional physico‐chemical properties. However, major drawbacks of LDHs material are its low conductivity, sluggish mass transfer and structural instability in acidic media, which hinder their applicability and stability. To surmount these obstacles, the formation of LDH@graphene and analogus heterostructures could proficiently amalgamate multi‐functionalities, compensate distinct shortcomings, and endow novel properties, which ensure effective charge separation to result in stability and superior catalytic activities. Herein, we aim to summarize the currently updated synthetic strategies used to design heterostructures of 2D LDHs with 2D/3D graphene and graphene analogus material as graphitic carbon nitride (g‐C3N4), and MoS2 as mediator, or interlayer support, or co‐catalyst or vice versa for superior PC/PEC water splitting activities along with long‐term stabilities. Furthermore, latest characterization technique measuring the stability along with variant interface mode for imparting charge separation in LDH@graphene and graphene analogus heterostructure has been identified in this field of research with understanding the intrinsic structural features and activities.

show abstract

Section: Characterization Techniques Measuring the Stability Of Ldh@graphene And Analogous Heterostructure For Pc/pec Water Splittingmentioning

confidence: 99%

Section: Magnifying Mechanism Of Charge Separation Related To Stability Of Ldh@graphene and Analogous Heterostructure Towards Pc/pec Watementioning

confidence: 99%

Recent Progress in LDH@Graphene and Analogous Heterostructures for Highly Active and Stable Photocatalytic and Photoelectrochemical Water Splitting

Nayak

2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…Table 2 presents the most recent studies regarding the S-scheme heterojunction application in organic pollutant removal. The hydrothermal method was employed to develop MoS 2 /CoAl [84] and WO 3 /TiO 2 / reduced graphene oxide (rGO) [85] heterostructures for hydrogen production using methanol aqueous solution. Both components of the MoS2/CoAl sample have the light absorption range in Vis spectra (E GMoS2 = 1.8 eV and E GCoAl = 2.1 eV), and the heterostructure is able to exhibit 17.1 µmol/h hydrogen evolution under 300W light irradiation.…”

Section: Photocatalytic Water Splitting For Hydrogen Productionmentioning

confidence: 99%

Photocatalytic Activity of S-Scheme Heterostructure for Hydrogen Production and Organic Pollutant Removal: A Mini-Review

Eneşca

Andronic

2021

Nanomaterials

View full text Add to dashboard Cite

Finding new technologies and materials that provide real alternatives to the environmental and energy-related issues represents a key point on the future sustainability of the industrial activities and society development. The water contamination represents an important problem considering that the quantity and complexity of organic pollutant (such as dyes, pesticides, pharmaceutical active compounds, etc.) molecules can not be efficiently addressed by the traditional wastewater treatments. The use of fossil fuels presents two major disadvantages: (1) environmental pollution and (2) limited stock, which inevitably causes the energy shortage in various countries. A possible answer to the above issues is represented by the photocatalytic technology based on S-scheme heterostructures characterized by the use of light energy in order to degrade organic pollutants or to split the water molecule into its components. The present mini-review aims to outline the most recent achievements in the production and optimization of S-scheme heterostructures for photocatalytic applications. The paper focuses on the influence of heterostructure components and photocatalytic parameters (photocatalyst dosage, light spectra and intensity, irradiation time) on the pollutant removal efficiency and hydrogen evolution rate. Additionally, based on the systematic evaluation of the reported results, several perspectives regarding the future of S-scheme heterostructures were included.

show abstract

“…In addition, the CO 2 molecule exhibits a strong affinity to pyridine nitrogen in g-C 3 N 4 , which is beneficial for CO 2 reduction (Zhu et al, 2017). Construction of hybrids has also proven to be effective for g-C 3 N 4 (Li et al, 2020b;Li et al, 2020c;Li et al, 2021c;Li et al, 2020d;Mei et al, 2021;Tao et al, 2021). For instance, Fu et al designed a 2D/2D WO 3 /g-C 3 N 4 composite, in which atomic-level thickness of each is realized (Fu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

Fei

Zhang

et al. 2021

Front. Nanotechnol.

View full text Add to dashboard Cite

Photocatalytic CO2 reduction is a promising method to mitigate the greenhouse effect and energy shortage problem. Development of effective photocatalysts is vital in achieving high photocatalytic activity. Herein, the S-scheme heterojunctions composed by BiOBr and g-C3N4 with or without S doping are thoroughly investigated for CO2 reduction by density functional theory (DFT) calculation. Work function and charge density difference demonstrate the existence of a built-in electric field in the system, which contributes to the separation of photogenerated electron-hole pairs. Enhanced strength of a built-in electric field is revealed by analysis of Bader charge and electric field intensity. The results indicate that S doping can tailor the electronic structures and thus improve the photocatalytic activity. According to the change in absorption coefficient, system doping can also endow the heterojunction with increased visible light absorption. The in-depth investigation indicates that the superior CO2 reduction activity is ascribed to low rate-determining energy. And both of the heterojunctions are inclined to generate CH3OH rather than CH4. Furthermore, S doping can further reduce the energy from 1.23 to 0.44 eV, indicating S doping is predicted to be an efficient photocatalyst for reducing CO2 into CH3OH. Therefore, this paper provides a theoretical basis for designing appropriate catalysts through element doping and heterojunction construction.

show abstract

Internal electric field induced S–scheme heterojunction MoS2/CoAl LDH for enhanced photocatalytic hydrogen evolution

Cited by 178 publications

References 49 publications

Recent Progress in LDH@Graphene and Analogous Heterostructures for Highly Active and Stable Photocatalytic and Photoelectrochemical Water Splitting

Recent Progress in LDH@Graphene and Analogous Heterostructures for Highly Active and Stable Photocatalytic and Photoelectrochemical Water Splitting

Photocatalytic Activity of S-Scheme Heterostructure for Hydrogen Production and Organic Pollutant Removal: A Mini-Review

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

Contact Info

Product

Resources

About