Photocatalytic oxidative desulfurization and denitrogenation for fuels in ambient air over Ti3C2/g-C3N4 composites under visible light irradiation

Li, Bolun; Song, Haiyan; Han, Fuqin; Wei, Lishan

doi:10.1016/j.apcatb.2020.118845

Cited by 99 publications

(40 citation statements)

References 76 publications

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“…Figure 7c shows the GC−MS spectra of PODS of TH; the peak at 116 m / z is identified to be the sulfone molecule. Combined with the capture experiments, the pathway of PODS is shown in Figure 7d [44] . Under visible light irradiation, e − and H + were produced in Ti 3 C 2 /g‐C 3 N 4 composites.…”

Section: Mechanism Of Podsmentioning

confidence: 92%

“…Li et al. prepared MXene (Ti 3 C 2 ) modified g‐C 3 N 4 catalysts for PODS [44] . The g‐C 3 N 4 nanosheets were successfully inserted by Ti 3 C 2 , forming a heterogeneous structure with enhanced interface effect.…”

Section: Solutions To Podsmentioning

confidence: 99%

“…Li et al. prepared MXene‐Ti 3 C 2 (M)‐modified g‐C 3 N 4 composites and applied them to photocatalytic oxidation denitrification and desulfurization under visible light [44] . The results show that the removal rates of pyridine (Pyr) and TH are as high as 245.2 and 270.7 μg g −1 , respectively.…”

Section: Mechanism Of Podsmentioning

confidence: 99%

“…Combined with the capture experiments, the pathway of PODS is shown in Figure 7d. [44] Under visible light irradiation, e À and H + were produced in Ti 3 C 2 /g-C 3 N 4 composites. The excited photogenerated electrons were combined with O 2 to form * O 2 À .…”

Section: Mechanism Of Podsmentioning

confidence: 99%

“…[36] A similar phenomenon is observed with bulk g-C 3 N 4 material: its PODS removal of BT is barely 40 %. [44] Therefore, to transfer more photonic energy to chemical energy, the transport efficiency of photocarriers must be improved. [45]…”

Section: Fast Photocarrier Recombination Ratementioning

confidence: 99%

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Desulfurization through Photocatalytic Oxidation: A Critical Review

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Fuel oil, the most important strategic resource, has been widely used in industrial applications. However, the sulfur‐containing compounds in fuel oil also present humanity with huge environmental issues and health concerns due to the hazardous combustion waste. To address this problem, the low vulcanization of fuel production technology has been intensively explored. Compared with traditional hydrodesulfurization technology, the newly emerged photocatalytic desulfurization has the advantages of milder operating conditions, lower energy consumption, and higher efficiency, holding great prospect to achieve deep desulfurization. Though great efforts have been made, the desulfurization catalysts still suffer from inferior light absorption, fast recombination of photocarriers, and poor structure modification. This Review summarizes recent development of photocatalytic desulfurization, including the desulfurization principle, current desulfurization challenges, and corresponding solutions. Particularly, the roles of defect engineering, hybrid coupling, and structure modifications in the enhancement of photocatalytic performance are emphasized. In addition, the photocatalytic desulfurization mechanism is also introduced with the .OH and .O2− radicals as main active species. Finally, some perspectives on the photocatalytic desulfurization are provided, which can further optimize the desulfurization efficiency and guide future photocatalyst design.

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Section: Mechanism Of Podsmentioning

confidence: 92%

Section: Solutions To Podsmentioning

confidence: 99%

Section: Mechanism Of Podsmentioning

confidence: 99%

Section: Mechanism Of Podsmentioning

confidence: 99%

Section: Fast Photocarrier Recombination Ratementioning

confidence: 99%

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Desulfurization through Photocatalytic Oxidation: A Critical Review

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Atomically Dispersed Silver‐Cobalt Dual‐Metal Sites Synergistically Promoting Photocatalytic Hydrogen Evolution

Liu

Sun

Zhao

et al. 2023

Adv Funct Materials

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Regulating the coordination environment of single‐atom sites is of high necessity to promote the catalytic performances of the photocatalysts. Herein, the preparation of atomically dispersed Co‐Ag dual‐metal sites anchored on P‐doped carbon nitride (Co1Ag1‐PCN) via supramolecular and solvothermal approaches is reported, which demonstrates desirable performance for photocatalytic H2 evolution from water splitting. The optimal Co1Ag1‐PCN catalyst achieves a remarkable hydrogen production rate of 1190 µmol g−1 h−1 with an apparent quantum yield (AQY) of 1.49% at 365 nm, superior to most of the newly reported metal‐N‐coordinated photocatalysts. Systematic experimental characterizations and density functional theoretic studies attribute the enhanced photocatalytic activity to the synergistic effect of Co‐Ag dual sites with exclusive coordination configuration of Co‐N6 and Ag‐N2C2, which enhances the charge density and promotes oriented electrons transport to the metal centers with reduced free energy barriers by facilitating the formation of H* intermediates as the key step in hydrogen evolution. This study reveals a versatile strategy to tailor the electronic structures of dual‐metal sites with synergies by engineering the neighboring coordination environment.

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A Critical Review on New and Efficient 2D Materials for Catalysis

Zhao

Wang

2022

Adv Materials Inter

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by molybdenum disulfide (MoS 2 ) and tungsten disulfide (WS 2 ), boron nitride (BN), and part of alloy nanosheets are two-element 2D materials; and transition metal carbide and nitride (MXene) are multielement 2D materials. [6][7][8][9] Graphene is widely used in catalysis due to its unique electronic structure. Its main applications include electrocatalysis, [10,11] photocatalysis, [12] and thermocatalysis. [13] Due to the lack of sufficient energy gap in natural graphene, the electron transfer efficiency is very low. [14] There are many ways to improve the catalytic performance of graphene, such as dislocations, vacancies, edges, impurities, and functional groups that interfere with the graphene structure. [6,15] Due to its unique physicochemical properties and broad application prospects, 2D element metal nanosheets (such as Ru, Bi, Rh, Pd, and Cu) have gradually attracted the attention of researchers. [16][17][18][19][20] The thickness of a single metal atom or several metal atoms makes them have ultrahigh specific surface area and relatively high surface energy, and the abundant surface metal active sites make them have a wide range of applications in the field of catalysis. For example, Ru NSs and their derived Ru oxides exhibit excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities, respectively. [16] Bi (001) porous nanosheets exhibit excellent electrochemical performance in the reduction of CO 2 to formate. [17] Single-crystal Rh nanosheets exhibit extremely high catalytic activity in hydrogenation reactions. [18] On this basis, 2D alloy nanosheets (such as PdAg, PdAu, AuAg, PtCu, etc.) have made substantial progress in the field of catalysis in recent years. [18] Compared with 2D element metal nanosheets, 2D alloy nanosheets not only inherit the advantages of ultrahigh specific surface area and inherent properties of 2D metals, but also the synergistic effect between different elements also promotes some catalytic reactions to a certain extent. TMDCs are widely used in heterogeneous catalysis due to their unique mechanical structure and electronic properties. The layered structure of TMDCs gives them highly anisotropic properties, extremely high specific surface area, the possibility of intercalating different species between the layers, and stability as ultrathin as thin as three atomic layers thick. [21] Structural cutting, defect engineering, chemical modification, and combination with other layered materials with complementary functions can effectively improve the catalytic activity of TMDCs. [22] For example, electrochemical tests on MoS 2 triangular clustersThe unique structure and properties of graphene make it have excellent performance in the field of catalysis. It can be modified in various ways to improve its catalytic ability. Notably, other 2D materials with similar properties to graphene (black phosphorus (BP), 2D transition metal dichalcogenides represented by molybdenum disulfide (MoS 2 ) and tungsten disulfide (WS 2 ), boron nitride (BN), and transiti...

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Photocatalytic oxidative desulfurization and denitrogenation for fuels in ambient air over Ti3C2/g-C3N4 composites under visible light irradiation

Cited by 99 publications

References 76 publications

Desulfurization through Photocatalytic Oxidation: A Critical Review

Desulfurization through Photocatalytic Oxidation: A Critical Review

Atomically Dispersed Silver‐Cobalt Dual‐Metal Sites Synergistically Promoting Photocatalytic Hydrogen Evolution

A Critical Review on New and Efficient 2D Materials for Catalysis

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