Boosting photocatalytic activity of C-F-TiO2 nanosheets derived from in-situ pyrolysis of MXene

Zhao, Qi; Yuan, Y.; Zhang, Luyan; Qiao, Liang; Ding, Cheng; Wang, Kangshun; Liu, Hongpeng; Ma, Jun; Wang, Panpan; Chen, YangQuan; Wang, Feihong

doi:10.1016/j.apsusc.2022.155630

Cited by 11 publications

(4 citation statements)

References 65 publications

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“…As shown in figure 2(f), P-FGDY/TiO 2 exhibits the smallest arc radius of all catalysis, providing a direct inference that the P-FGDY/TiO 2 has minimum resistance [61]. Therefore, the P-FGDY/TiO 2 possesses a rapid electron migration speed, which can be attributed to the strong interaction between P-FGDY and TiO 2 [62,63].…”

Section: Synthesis and Characterizationmentioning

confidence: 77%

Enhance the photocatalytic activity of fluoride graphdiyne/TiO₂ through introducing organic components

Wang,

Liu,

Zhang

et al. 2023

2D Mater.

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Structure engineering of hybrid materials has been proved to be an efficient method to screen out superior photocatalysis. The distribution and bonding environment of covalent linkage segments can be well regulated through structure decoration. Here, we propose a controlled strategy to optimize the photocatalytic performance of hybrid catalysts. Systematic adjusting of the performance can be achieved by introducing organic components into the carbon supporter. Under the guidance of this strategy, fluoride graphdiyne (FGDY) and phloroglucinol regulating FGDY (P-FGDY) is compounded with titanium dioxide (TiO2) under solvent thermal condition to obtain hybrid catalyst FGDY/TiO2 and P-FGDY/TiO2, respectively. Notably, the as-prepared P-FGDY/TiO2 exhibits superior enhancements towards photocatalytic degradation of rhodamine B, methylene blue, and levofloxacin under visible-light irradiation compared with FGDY/TiO2. These enhanced photocatalytic activities stem from the fact that the regulation of FGDY could further increase the photogenerated electron and hole separation efficiency of hybrid catalyst. This work provides a novel regulating pathway to optimize the photocatalytic activity of carbon-based hybrid photocatalysis material systems.

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Section: Synthesis and Characterizationmentioning

confidence: 77%

Enhance the photocatalytic activity of fluoride graphdiyne/TiO₂ through introducing organic components

Wang,

Liu,

Zhang

et al. 2023

2D Mater.

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“…Additionally, the high reducibility of transition metals in MXene contributes to oxidation through redox reactions with oxygen. Therefore, air calcination is the most widely adopted route to achieve the composite, in which the resultant TiO 2 is in the form of nanoparticles. , To achieve specific TiO 2 nanostructures of (001)-exposing crystals, nanosheets, , nanowires, or nanoneedles, oxidants like F – ions, NaOH, or a mixture of NaOH and H 2 O 2 are utilized to oxidize the Ti 3 C 2 MXene under a hydrothermal or solvothermal environment. In our group, TiO 2 with various nanostructures of nanorods, nanowires, nanoflowers, and nanobelts has been achieved through the Ti–H 2 O 2 interaction under a low temperature of 80 °C and in an open atmosphere.…”

Section: Introductionmentioning

confidence: 99%

A H₂O₂ Oxidation Approach to Ti₃C₂/TiO₂ for Efficient Photocatalytic Removal of Distinct Organic Pollutants in Water

Zhang,

Cao,

Yang

et al. 2024

Langmuir

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To develop versatile photocatalysts for efficient degradation of distinct organic pollutants in water is a continuous pursuit in environment remediation. Herein, we directly oxidize Ti 3 C 2 MXene with hydrogen peroxide to produce C-doped anatase TiO 2 nanowires with aggregates maintaining a layered architecture of the MXene. The Ti 3 C 2 MXene provides a titanium source for TiO 2 , a carbon source for in situ C-doping, and templates for nanowire aggregates. Under UV light illumination, the optimized Ti 3 C 2 /TiO 2 exhibits a reaction rate constant 1.5 times that of the benchmark P25 TiO 2 nanoparticles, toward photocatalytic degradations of trace phenol in water. The mechanism study suggests that photogenerated holes play key roles on the phenol degradation, either directly oxidizing phenol molecules or in an indirect way through oxidizing first the surface hydroxyl groups. The unreacted Ti 3 C 2 MXene, although with trace amounts, is supposed to facilitate electron transfer, which inhibits charge recombination. The unique nanostructure of layered aggregates of nanowires, abundant surface oxygen vacancies arising from the carbon doping, and probably the Ti 3 C 2 /TiO 2 heterojunction guarantee the high photocatalytic efficiency toward removals of organic pollutants in water. The photocatalyst also exhibits an activity superior to, or at least comparable to, the benchmark P25 TiO 2 toward photodegradations for typical persistent organic pollutants of phenol, dye molecule of rhodamine B, antibiotic of tetracycline, pharmaceutical wastewater of ofloxacin, and pesticide of N,N-dimethylformamide, when evaluated in total organic carbon removal.

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“…Since Inoue et al published their pioneering work on the photoconversion of CO 2 into value-added chemicals over various semiconductors in 1979, many semiconductor materials have been extensively studied in CO 2 photoreduction. Among them, TiO 2 has become the most widely studied photocatalytic material in the field of photocatalytic reduction of CO 2 due to its low cost, nontoxicity, and good chemical stability. − However, because the sensitivity of TiO 2 is limited to the ultraviolet light region, the efficiency of CO 2 photocatalytic reduction is low. − To use the complete solar spectrum, a series of methods have been implemented, such as metal doping, − nonmetal doping, , semiconductor coupling, , and photosensitization, − among which photosensitization is considered to be one of the most effective methods. In organic photosensitizers, porphyrin derivatives have a strong absorption peak near 400–450 nm (Soret band) and a weak Q-band in the range of 500–700 nm , and, showing good photostability and durability, are considered to be promising sensitizers for TiO 2 composite formation.…”

Section: Introductionmentioning

confidence: 99%

“…13−15 However, because the sensitivity of TiO 2 is limited to the ultraviolet light region, the efficiency of CO 2 photocatalytic reduction is low. 16−18 To use the complete solar spectrum, a series of methods have been implemented, such as metal doping, 19−22 nonmetal doping, 23,24 semiconductor coupling, 25,26 and photosensitization, 27−30 among which photosensitization is considered to be one of the most effective methods. In organic photosensitizers, porphyrin derivatives have a strong absorption peak near 400−450 nm (Soret band) and a weak Q-band in the range of 500−700 nm 31,32 and, showing good photostability and durability, are considered to be promising sensitizers for TiO 2 composite formation.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Photocatalytic Conversion of Gas-Phase CO₂ Using Bimetallic Porphyrin-Sensitized TiO₂ Nanotube Arrays

Xiao,

Wu,

Liang

et al. 2024

J. Phys. Chem. C

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Solar-powered photocatalytic conversion of CO 2 into green solar fuels is one of the effective ways to solve the global energy crisis and the greenhouse effect. A new artificial photosynthesis system composed of TiO 2 nanotube arrays (TiO 2 NTs) and bimetallic porphyrin was fabricated, and their photocatalytic activities were evaluated by the reduction of gasphase CO 2 to CH 4 under simulated solar irradiation. Compared to pure TiO 2 NTs and CoTCPP/TiO 2 NTs, bimetallic porphyrinsensitized TiO 2 NTs displayed greatly ameliorated photocatalytic activity. Among them, Ni-CoTCPP/TiO 2 NTs exhibited the highest photoreduction efficiency, and the reduction rate of CO 2 into CH 4 was up to 52.27 μmol/cm 2 /h with the quantum efficiency of 1.002%, about 7 times higher than that of pure TiO 2 NTs. The increase in photocatalytic performance can be attributed to the enhancement of the light absorption capacity of Ni-CoTCPP/TiO 2 NTs and the higher charge separation efficiency. Furthermore, according to the results of the photocatalytic evaluation and photo(electro)chemical studies, a possible mechanism of CO 2 photoreduction over Ni-CoTCPP/TiO 2 NTs was proposed.

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Boosting photocatalytic activity of C-F-TiO2 nanosheets derived from in-situ pyrolysis of MXene

Cited by 11 publications

References 65 publications

Enhance the photocatalytic activity of fluoride graphdiyne/TiO₂ through introducing organic components

Enhance the photocatalytic activity of fluoride graphdiyne/TiO₂ through introducing organic components

A H₂O₂ Oxidation Approach to Ti₃C₂/TiO₂ for Efficient Photocatalytic Removal of Distinct Organic Pollutants in Water

Highly Efficient Photocatalytic Conversion of Gas-Phase CO₂ Using Bimetallic Porphyrin-Sensitized TiO₂ Nanotube Arrays

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Boosting photocatalytic activity of C-F-TiO2 nanosheets derived from in-situ pyrolysis of MXene

Cited by 11 publications

References 65 publications

Enhance the photocatalytic activity of fluoride graphdiyne/TiO2 through introducing organic components

Enhance the photocatalytic activity of fluoride graphdiyne/TiO2 through introducing organic components

A H2O2 Oxidation Approach to Ti3C2/TiO2 for Efficient Photocatalytic Removal of Distinct Organic Pollutants in Water

Highly Efficient Photocatalytic Conversion of Gas-Phase CO2 Using Bimetallic Porphyrin-Sensitized TiO2 Nanotube Arrays

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Enhance the photocatalytic activity of fluoride graphdiyne/TiO₂ through introducing organic components

Enhance the photocatalytic activity of fluoride graphdiyne/TiO₂ through introducing organic components

A H₂O₂ Oxidation Approach to Ti₃C₂/TiO₂ for Efficient Photocatalytic Removal of Distinct Organic Pollutants in Water

Highly Efficient Photocatalytic Conversion of Gas-Phase CO₂ Using Bimetallic Porphyrin-Sensitized TiO₂ Nanotube Arrays