Ti3C2 Mxene modified SnNb2O6 nanosheets Schottky photocatalysts with directed internal electric field for tetracycline hydrochloride removal and hydrogen evolution

Wang, He; Chen, Lei; Sun, Yanping; Yu, Jie; Zhao, Yue; Zhan, X.; Shi, Huixiang

doi:10.1016/j.seppur.2021.118516

Cited by 75 publications

(25 citation statements)

References 89 publications

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“…2D/2D ultrathin interfacial Schottky Ti 3 C 2 Mxene/SnNb 2 O 6 nanosheets were synthesized by Wang and co-workers (Wang et al 2021a ) through an ultrasonication-assisted hydrothermal procedure (Fig. 10 a–d).…”

Section: Mechanisms Of Semiconductor Heterojunction Photocatalysis and The Separation Of Electron–hole Pairsmentioning

confidence: 99%

“…Theoretical calculations of work function values of b Ti 3 C 2 and c SnNb 2 O 6 . d Charge density difference diagram of Ti 3 C 2 /SnNb 2 O 6 (d) (Reprinted with permission of Elsevier from Wang et al 2021a ). e Proposed photocatalytic mechanism of Ag/Bi 3 TaO 7 for degradation of tetracycline under visible irradiation: SPR absorbance of metallic Ag nanoparticles and charge carriers transfer in Schottky heterojunction of Ag/Bi 3 TaO 7 (Reprinted with permission of American Chemical Society from Luo et al 2015 ).…”

Section: Mechanisms Of Semiconductor Heterojunction Photocatalysis and The Separation Of Electron–hole Pairsmentioning

confidence: 99%

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Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

2021

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Antibiotic pollution is a major health issue inducing antibiotic resistance and the inefficiency of actual drugs, thus calling for improved methods to clean water and wastewater. Here we review the recent development of heterojunction photocatalysis and application in degrading tetracycline. We discuss mechanisms for separating photogenerated electron–hole pairs in different heterojunction systems such as traditional, p–n, direct Z-scheme, step-scheme, Schottky, and surface heterojunction. Degradation pathways of tetracycline during photocatalysis are presented. We compare the efficiency of tetracycline removal by various heterojunctions using quantum efficiency, space time yield, and figures of merit. Implications for the treatment of antibiotic-contaminated wastewater are discussed.

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Section: Mechanisms Of Semiconductor Heterojunction Photocatalysis and The Separation Of Electron–hole Pairsmentioning

confidence: 99%

Section: Mechanisms Of Semiconductor Heterojunction Photocatalysis and The Separation Of Electron–hole Pairsmentioning

confidence: 99%

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

2021

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“…As shown in Figure 8e, the yellow and blue fields represent the accretion and depletion of electrons, respectively. [ 48 ] It is easy to find that charge redistribution occurs at the CZS/Ti 3 C 2 ‐A 40 hybrid interface, and CZS can provide electrons to the Ti 3 C 2 ‐A 40 surface. On the hybrid interface, the internal electric field from CZS to Ti 3 C 2 ‐A 40 is formed due to the redistribution of carriers.…”

Section: Resultsmentioning

confidence: 99%

Surface‐Activated Ti₃C₂T_xMXene Cocatalyst Assembled with CdZnS‐Formed 0D/2D CdZnS/Ti₃C₂‐A₄₀Schottky Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

Zhong¹,

Yu²,

Jiang

et al. 2021

Solar RRL

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2D MXene-based catalysts, such as Ti 3 C 2 T x have unique, excellent properties and show extraordinary advantages in many catalytic reactions. However, as cocatalysts for photocatalytic hydrogen evolution reaction (HER), MXene has insufficient catalytic activity because the active metal sites of H þ binding are hidden by passivation ÀF/ÀO termination, which hinders postreaction desorption of H 2 . A simple ultrasonic treatment method is used to expose more active sites and adjust the surface work function of Ti 3 C 2 T x , and additionally inactive ÀF/ÀO terminal groups are replaced with diaminoethanethiol, denoted as Ti 3 C 2 -A x , as the surface terminal group through covalent bonds (TiÀS). The optimized photocatalyst (Cd 0.4 Zn 0.6 S/Ti 3 C 2 -A 40 ) demonstrates excellent catalytic activity (HER: 13.44 mmol h À1 g À1 ), which is about 5.8 and 1.9 times higher than that of pristine Cd 0.4 Zn 0.6 S and Cd 0.4 Zn 0.6 S/Ti 3 C 2 with stability (24 h of cycle experiments), outperforming most of the reported MXene-based photocatalysts. The results of relevant experiments and density functional theory calculations reveal that the excellent conductivity of Ti 3 C 2 -A 40 , well-structured Cd 0.4 Zn 0.6 S/ Ti 3 C 2 -A 40 Schottky junction, and the efficient interfacial charge transfer are major factors that contribute to the improved photocatalytic mechanism. This promotes application of surface-modified MXene as an efficient cocatalyst and provides a new idea for design and synthesis of heterojunction materials.

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“…Subsequently, Wang et al fabricated Ti 3 C 2 MXene/SnNb 2 O 6 to unravel the role of highly conductive Ti 3 C 2 MXene in enhancing photocatalytic hydrogen production. 109 They disclosed that an improvement in the hydrogen generation rate (175.2 μmol h −1 g −1 ) could be observed after incorporating few-layered Ti 3 C 2 MXene nanosheets into SnNb 2 O 6 , achieving an enhancement twice that of pure SnNb 2 O 6 . It was even noted that the SnNb 2 O 6 based photocatalyst exhibited a low quantum yield due to its internal features.…”

Section: Ti 3 C 2 Mxene As a Photoactivity Enhancermentioning

confidence: 99%

Role of Ti₃C₂ MXene as Prominent Schottky Barriers in Driving Hydrogen Production through Photoinduced Water Splitting: A Comprehensive Review

Sherryna

Tahir

2021

ACS Appl. Energy Mater.

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Photocatalytic hydrogen generation through the utilization of the Ti 3 C 2 MXene photocatalyst offers the best alternatives to provide clean, sustainable, and renewable energy sources. The unique structure, good metallic conductivity, and excellent photochemical properties exhibited by Ti 3 C 2 MXene nominate it as a highly favored cocatalyst to derive hydrogen generation compared to other noncommercial semiconductors. This review highlights the role of Ti 3 C 2 MXene and its potential in promoting photocatalytic hydrogen production through the formation of Schottky interfaces. First, the structural overview and the basic principles of Ti 3 C 2 MXene in photocatalysis are summarized. Second, a brief introduction to the characteristics of Ti 3 C 2 MXene is made to give a firm understanding of its optoelectronic and electrical properties and its stability under thermal and oxidative treatment. Besides, the role of Ti 3 C 2 MXene in promoting photocatalytic hydrogen production is consistently discussed with a focus on the photoactivity enhancement of Ti 3 C 2 MXene-based Schottky junctions. Furthermore, insights into the different morphological effects of Ti 3 C 2 MXene on photocatalytic reactions are summarized. Finally, the future prospects and challenges are discussed to give insights into the future development of Ti 3 C 2 MXene. Hence, this review provides a significant overview for further exploring the role of Ti 3 C 2 MXene as an effective cocatalyst for photocatalytic H 2 production and other energy applications.

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Ti3C2 Mxene modified SnNb2O6 nanosheets Schottky photocatalysts with directed internal electric field for tetracycline hydrochloride removal and hydrogen evolution

Cited by 75 publications

References 89 publications

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

Surface‐Activated Ti₃C₂T_xMXene Cocatalyst Assembled with CdZnS‐Formed 0D/2D CdZnS/Ti₃C₂‐A₄₀Schottky Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

Role of Ti₃C₂ MXene as Prominent Schottky Barriers in Driving Hydrogen Production through Photoinduced Water Splitting: A Comprehensive Review

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Ti3C2 Mxene modified SnNb2O6 nanosheets Schottky photocatalysts with directed internal electric field for tetracycline hydrochloride removal and hydrogen evolution

Cited by 75 publications

References 89 publications

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

Surface‐Activated Ti3C2TxMXene Cocatalyst Assembled with CdZnS‐Formed 0D/2D CdZnS/Ti3C2‐A40Schottky Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

Role of Ti3C2 MXene as Prominent Schottky Barriers in Driving Hydrogen Production through Photoinduced Water Splitting: A Comprehensive Review

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Surface‐Activated Ti₃C₂T_xMXene Cocatalyst Assembled with CdZnS‐Formed 0D/2D CdZnS/Ti₃C₂‐A₄₀Schottky Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

Role of Ti₃C₂ MXene as Prominent Schottky Barriers in Driving Hydrogen Production through Photoinduced Water Splitting: A Comprehensive Review