0D/2D AgInS2/MXene Z-scheme heterojunction nanosheets for improved ammonia photosynthesis of N2

Qin, Jiangzhou; Hu, Xia; Li, Xinyong; Yin, Zhifan; Liu, Baojun; Lam, Kwok Ho

doi:10.1016/j.nanoen.2019.04.028

Cited by 205 publications

(91 citation statements)

References 48 publications

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“…In our group, Qin and co-workers reported 0D AgInS 2 supported on 2D MXene nanosheets with Z-scheme heterojunction, which exhibited good ammonia production (38.8 μmol/(g•h)). [112] It was found that the formed hybrid showed improved interfacial charge transfer efficiency with different ratios of the two compounds. By DFT calculations, three pathways of N 2 adsorption modes on the (001) crystal face of Ti 3 C 2 were found.…”

Section: Multidimensional Interface Engineeringmentioning

confidence: 97%

Defect and Interface Engineering on Two‐Dimensional Nanosheets for the Photocatalytic Nitrogen Reduction Reaction

et al. 2020

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Reducing dinitrogen (N 2) to ammonia (NH 3) under mild conditions is a very significant nitrogen cyclic process, which plays a vital role in agricultural, biological and industrial fields. The Haber-Bosch process as a current mainstream way of N 2 fixation has particularly high energy consumption, occupying about 1 % of the world energy production. In contrast, the photocatalytic N 2 reduction reaction provides a green route almost without energy consumption and environmental pollution. However, there are many challenges that needs to be solved urgently, such as, for example, low quantum yield, inefficient N 2 adsorption and activation and an unclear N 2 fixation mechanism. Nowadays, tactics for improving the catalytic performance mainly focus on producing more active sites via defect or interface engineering. Generally, two-dimensional materials with defect or interface engineering can not only accelerate photon-exciton interactions, but also enhance sufficient N 2 binding, activation and hydrogenation. In this Minireview, we will first summarize the principles of photocatalytic N 2 fixation, and then discuss progress in the development two-dimensional (2D) materials with defect and interface engineering for photocatalytic N 2 fixation. Finally, we describe ammonia detection methods and recent important developments and challenges in this field.

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Section: Multidimensional Interface Engineeringmentioning

confidence: 97%

Defect and Interface Engineering on Two‐Dimensional Nanosheets for the Photocatalytic Nitrogen Reduction Reaction

et al. 2020

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“…Compared with pristine 2D MXene, functional 2D MXenes, including surface-modified 2D MXenes and mixed-dimensional 2D MXene-based heterostructures, exhibit remarkably improved performances due to the synergistic effect, which have great potential for next-generation devices in versatile fields. [65,74,[153][154][155][156][157][158] Investigations on the performances of functional 2D MXenes play an important role in understanding the structure-property relationships and functional 2D MXenerelated applications. In this section, the related applications (energy storage and conversion, catalysis, sensors, photodetectors, EMI shielding, and biomedical applications) of functional 2D MXenes are discussed in detail.…”

Section: Related Applicationsmentioning

confidence: 99%

“…Recent research studies have shown that MXenes have promising potential for photocatalytic applications, due to some distinct properties: i) the high carrier mobility in MXene-based system efficiently promoting the separation and migration of photogenerated electron-hole pairs; ii) the tunable band gap of MXenes by altering their surface chemistries, for example, the terminated -F, -O, or -OH groups, or the arrangements of surface groups; iii) the abundant surface groups with more active sites on the surface of MXene. [178][179][180] It is noted that Ti 3 C 2 T x has already been employed as an efficient co-catalyst in g-C 3 N 4 , [181][182][183][184] Bi 2 WO 6 , [185] BP, [178] AgInS 2 , [65,186] SrTiO 3 , [187] hematite, [154] , anatase, [179,188,189] and so on, to further enhance their photocatalytic performance. For example, in 2018, the 2D MXene Ti 3 C 2 T x /2D g-C 3 N 4 nanosheet heterostructures were rationally designed and successfully synthesized by calcination of bulk Ti 3 C 2 and urea, where urea not only acts as the gas template to process the exfoliation of Ti 3 C 2 into Ti 3 C 2 T x nanosheets, but also as the precursor of g-C 3 N 4 to obtain 2D MXene Ti 3 C 2 T x /2D g-C 3 N 4 nanosheet heterostructures.…”

Section: Catalysismentioning

confidence: 99%

Recent Advances in Functional 2D MXene‐Based Nanostructures for Next‐Generation Devices

Huang

Tang

et al. 2020

Adv Funct Materials

267

138

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Similar to graphene and black phosphorus (BP), 2D transition metal carbides and nitrides (MXenes) are of great interest in a variety of fields, such as energy storage and conversion, sensors, electromagnetic interference (EMI) shielding, and photothermal therapy due to their excellent conductivity and hydrophilicity, large specific capacitance, high photothermal effect, and superior electrochemical performance. To further broaden applicable ranges beyond their existing boundaries and fully exploit these potentials, functional 2D MXene nanostructures in recent years have been rationally designed and developed by various approaches, such as doping strategies, surface functionalization, and hybridization, for next-generation devices with the merits of low power consumption, intelligence, and high-integration chips. This review provides an overview of the synthetic routes and fundamental properties of functional 2D MXene nanostructures, including surfacemodified 2D MXenes and mixed-dimensional MXene-based heterostructures, highlights the state-of-the-art progress in the applications of functional 2D MXene nanostructures with regard to energy storage and conversion, catalysis, sensors, photodetectors, EMI shielding, degradation, and biomedical applications, and presents the challenges and perspectives in these burgeoning fields. It is hoped that this review will inspire more efforts toward fundamental research on new functional 2D MXene-based devices to satisfy the growing requirements for next-generation systems.

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“…In addition, different MXenes-based composites have also been fabricated through in situ growth of semiconductors on the 2D surface of MXenes, such as Ti 3 C 2 T x -CdS, [70,71] Ti 3 C 2 T x -ZnS, [72] [73] Ti 3 C 2 T x -ZnIn 2 S 4 , [74] Ti 3 C 2 T x -BiOBr, [75] Ti 3 C 2 T x -BiOCl, [76] [77] Nb 2 CT x -TiO 2 , [34] Nb 2 CT x -Bi 2 WO 6 , [78] Mo 2 CT x -CdS, [79] etc. [80][81][82][83][84][85][86] (detailed information can be found in Table 1). Notably, the surface of MXenes features with functional groups as well as high-portion exposed transition metal atoms.…”

Section: Growing Platformmentioning

confidence: 99%

“…[69,70] Besides, Ti 3 C 2 T x has reported to be a semiconductor with narrow band gap, which could form Z-scheme featured photocatalyst with traditional semiconductor for nitrogen photoreduction to ammonia. [86] It is learned from the above discussion that MXenes exhibit variable work function/Fermi level, which enables them to serve as acceptors for both electrons and holes. [96,[99][100][101][103][104][105][115][116][117][118][119][120][121]132] The flexile electronic properties of MXenes definitely provide more possibilities to deliver their diverse functions and applications.…”

Section: Electronic Structure Mutability Of Mxenesmentioning

confidence: 99%

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

Xie

Zhang

2020

Adv Funct Materials

202

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MXenes are becoming a worthy contender for boosting the efficacy of semiconductor photocatalysts because of their rich surface and electronic properties, which is exemplified to be a dynamic yet open‐ended exploration of the materials space. Herein, the promise that MXenes hold for photocatalytic applications is elucidated by presenting the various roles of MXenes in the preparation of composite photocatalysts and enhancing their activity and stability. A specific focus is put on the key issues that should be taken into account when utilizing the specific function of MXenes and the strategies to deliver the great potential of MXenes into better play. The discussion is based on different aspects closely related to the flexible surface and electronic features of MXenes, including their morphology control, stability issue, and electronic structure mutability with the purpose to present an objective and comprehensive scenario of MXenes for photocatalysis. Finally, some noteworthy research directions for the future development of MXenes‐based photocatalytic systems are outlined and prospected. This review is expected to provide a useful scaffold for the rational design and synthesis of efficient and stable MXenes‐based photocatalysts by objectively understanding and taming the functional vitality of MXenes.

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0D/2D AgInS2/MXene Z-scheme heterojunction nanosheets for improved ammonia photosynthesis of N2

Cited by 205 publications

References 48 publications

Defect and Interface Engineering on Two‐Dimensional Nanosheets for the Photocatalytic Nitrogen Reduction Reaction

Defect and Interface Engineering on Two‐Dimensional Nanosheets for the Photocatalytic Nitrogen Reduction Reaction

Recent Advances in Functional 2D MXene‐Based Nanostructures for Next‐Generation Devices

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

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