Efficient visible-light driven N<sub>2</sub> fixation over two-dimensional Sb/TiO<sub>2</sub> composites

Zhao, Zhenqing; Hong, Song; Yan, Chao‐Guo; Choi, Changhyeok; Sun, Zhenyu; Liu, Yongchao; Liu, Shizhen; Li, Xin; Qiu, Jieshan

doi:10.1039/c9cc02291k

Cited by 54 publications

(26 citation statements)

References 39 publications

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“…By combining the above CB and VB data of MIS and MoS 2 with that of band gap data achieved from the Kubleka Munk Function, the respective VB and CB of MIS and MoS 2 are calculated to be 1.30 eV and −0.08 eV, respectively. Consequently, since all the potentials are measured under pH = 7 condition, hence the reduction potential values for water and nitrogen at pH = 7 (NHE) were estimated to be E H + / H 2 0 = −0.41 eV and E N 2 / NH 3 0 = −0.76 eV by the equation: E 0 (pH=0) – 0.0591pH …”

Section: Results and Discussionmentioning

confidence: 99%

Constructing a Novel Surfactant-free MoS₂ Nanosheet Modified MgIn₂S₄ Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Swain

Sultana

Parida

2020

ACS Sustainable Chem. Eng.

156

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Nowadays the major research objective is to find an efficient renewable energy source which can be a potential solution to all our ongoing problems. With this regard, the interest has been blossoming toward effective photocatalytic HER and NRR at ambient condition. For the optimization of photocatalytic H2 evolution and NH3 production it is an exigent task to design a suitable photocatalytic semiconductor that hinders the low electron–hole separation efficiency. Benefiting from the combination of a 2D-2D semiconductor, we have proposed for the first time a series of p-MoS2/n-MgIn2S4 marigold flower-like heterojunction composites, with an excellent morphological contact interface through a facile two step hydrothermal process. The smart 2D-2D heterojunction structure provides large contact surface sites which reduce the migration distance between the separation sites of the photogenerated charge carrier to the heterojunction interface. This electron-rich system provided the multielectron pathway for the efficient reduction of nitrogen and can avoid the formation of high-energy intermediates. Thus, the high photocatalytic performance can be attributed to the heterojunction formation between two nanosheet, abundant exposed active sites via S–S linkage on the edge of metal sulfides and effective excitons separation. The developed MoS2/MIS heterojunction photocatalysts attain a high rate of NH3 production which is nearly 4 and 7 times higher than the bare MoS2 and MIS, and the rate of H2 evolution is 4 times higher than the bare MIS. The current investigation provides an excellent strategy to promote photocatalytic HER and NRR and sheds some light toward the development of efficient 2D based bifunctional materials.

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Section: Results and Discussionmentioning

confidence: 99%

Constructing a Novel Surfactant-free MoS₂ Nanosheet Modified MgIn₂S₄ Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Swain

Sultana

Parida

2020

ACS Sustainable Chem. Eng.

156

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“…OVs enriched Bi2MoO6 [164] and bimetallic layered-doublehydroxide (LDH) (ZnCr-LDH, ZnAl-LDH, and NiAl-LDH) nanosheets [165] were produced via an alkali etching approach. Alternatively, ultrasound irradiation was also shown to create defects mainly due to cavitation and induced ultrasonication chemistry [46,[166][167][168].…”

Section: Force-induced Strategiesmentioning

confidence: 99%

Photocatalytic nitrogen reduction to ammonia: Insights into the role of defect engineering in photocatalysts

et al. 2021

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Engineering of defects in semiconductors provides an effective protocol for improving photocatalytic N2 conversion efficiency. This review focuses on the state-of-the-art progress in defect engineering of photocatalysts for the N2 reduction toward ammonia. The basic principles and mechanisms of thermal catalyzed and photon-induced N2 reduction are first concisely recapped, including relevant properties of the N2 molecule, reaction pathways, and NH3 quantification methods. Subsequently, defect classification, synthesis strategies, and identification techniques are compendiously summarized. Advances of in situ characterization techniques for monitoring defect state during the N2 reduction process are also described. Especially, various surface defect strategies and their critical roles in improving the N2 photoreduction performance are highlighted, including surface vacancies (i.e., anionic vacancies and cationic vacancies), heteroatom doping (i.e., metal element doping and nonmetal element doping), and atomically defined surface sites. Finally, future opportunities and challenges as well as perspectives on further development of defect-engineered photocatalysts for the nitrogen reduction to ammonia are presented. It is expected that this review can provide a profound guidance for more specialized design of defect-engineered catalysts with high activity and stability for nitrogen photochemical fixation.

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“…The broad bandgap and fast recombination of the photoexcited charge carriers of TiO 2 severely reduce its utilization of light 94 . Creating TiO 2 ‐based heterostructures are an effective method to solve these problems, because heterostructures can induce spatial separation of charge carriers and increase the absorption of light 95–97 . Obviously, TiO 2 ‐based type‐II (with a staggered gap) heterostructures are effective for boosting photocatalytic NRR activity because of its appropriate band structure for charge separation.…”

Section: Advances In the Design And Synthesis Of Tio2‐based Catalysts For Nrrmentioning

confidence: 99%

“…Zhao et al . have reported that 2D Sb/amorphous TiO 2 heterostructures are capable for efficient photocatalytic N 2 fixation with methanol as a hole scavenger 97 . The hybrid catalyst with an Sb‐to‐TiO2 weight ratio of 1: 0.5 affords the largest NH 3 yield rate of 20.8 μmol h −1 g −1 .…”

Section: Advances In the Design And Synthesis Of Tio2‐based Catalysts For Nrrmentioning

confidence: 99%

Recent advances in TiO₂‐based catalysts for N₂ reduction reaction

Chen

Zhang

et al. 2021

SusMat

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Nitrogen (N2) fixation under mild conditions is a promising approach for green production of ammonia (NH3). In the past decades, various advanced catalysts have been fabricated to achieve this goal through electrocatalytic and photocatalytic processes. Among them, the TiO2‐based catalysts have been recognized as promising candidates due to their high activity, low cost, chemical stability, and nontoxicity. In this review, recent advances in the fabrication of high‐performance TiO2‐based materials for N2 reduction reaction (NRR) under mild conditions are summarized, including electrocatalytic and photocatalytic NRR. The design principles, synthetic strategies, and corresponding chemical/physical properties of TiO2‐based NRR catalysts are described in detail. Moreover, the key challenges and potential opportunities in this field are presented and discussed.

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Efficient visible-light driven N₂ fixation over two-dimensional Sb/TiO₂ composites

Abstract: Photochemical ammonia production under ambient conditions remains a grand challenge.

Cited by 54 publications

References 39 publications

Constructing a Novel Surfactant-free MoS₂ Nanosheet Modified MgIn₂S₄ Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Constructing a Novel Surfactant-free MoS₂ Nanosheet Modified MgIn₂S₄ Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Photocatalytic nitrogen reduction to ammonia: Insights into the role of defect engineering in photocatalysts

Recent advances in TiO₂‐based catalysts for N₂ reduction reaction

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Efficient visible-light driven N2 fixation over two-dimensional Sb/TiO2 composites

Abstract: Photochemical ammonia production under ambient conditions remains a grand challenge.

Cited by 54 publications

References 39 publications

Constructing a Novel Surfactant-free MoS2 Nanosheet Modified MgIn2S4 Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Constructing a Novel Surfactant-free MoS2 Nanosheet Modified MgIn2S4 Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Photocatalytic nitrogen reduction to ammonia: Insights into the role of defect engineering in photocatalysts

Recent advances in TiO2‐based catalysts for N2 reduction reaction

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Efficient visible-light driven N₂ fixation over two-dimensional Sb/TiO₂ composites

Constructing a Novel Surfactant-free MoS₂ Nanosheet Modified MgIn₂S₄ Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Constructing a Novel Surfactant-free MoS₂ Nanosheet Modified MgIn₂S₄ Marigold Microflower: An Efficient Visible-Light Driven 2D-2D p-n Heterojunction Photocatalyst toward HER and pH Regulated NRR

Recent advances in TiO₂‐based catalysts for N₂ reduction reaction