One-step preparation of C-doped TiO<sub>2</sub> nanotubes with enhanced photocatalytic activity by a water-assisted method

Nie, Xiaojiang; Wang, Junkun; Duan, Wenchao; Zhao, Zilong; Li, Liang; Zhang, Zhiqiang

doi:10.1039/d1ce00288k

Cited by 20 publications

(6 citation statements)

References 57 publications

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“…50,51 It was reported that doping C into the TiO 2 lattice can form a Ti O C or O Ti C structure, with peaks around 288.7 eV. 52 In this paper, the peak at 288.7 eV may be due to the sum of adventitious carbon and C-doping in the TiO 2 lattice. In order to prove that the diffraction peak at 288.7 eV was caused by doping C atoms, we refer to the method in the literature, 53 where TiO 2 and Ti-C,N were calcined at 600 °C to remove C atoms adsorbed on the surface.…”

Section: Xps Analysismentioning

confidence: 77%

C,N‐modified TiO₂‐supported Mn–Ce–Co_x‐based catalyst for low‐temperature NH₃‐SCR

Liu

Sun

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: The emission of NO x can causes serious environmental pollution and endangers human health. In recent years, the selective catalytic reduction of NO with NH 3 (NH 3 -SCR) technology has been widely studied and adopted to reduce the production and emissions of NO x during many technologies.RESULTS: A series of Mn-Ce-Co x /Ti-C,N catalysts were prepared by the impregnation method, and low-temperature NH 3 -SCR was studied. The results show that support modification (Ti-C,N) can broaden the operation temperature window of the catalyst (NO conversion >95%: Mn-Ce/TiO 2 catalyst, 160-320 °C; Mn-Ce/Ti-C,N catalyst, 140-320 °C). The doping of Co further improves the low-temperature NH 3 -SCR of the catalyst. When n(Co):n(Ti) = 0.05, the catalyst has the best catalytic performance with the NO conversion reaches 100% at 100 °C.CONCLUSION: Temperature-programmed reduction (H 2 -TPR) and temperature-programmed desorption (NH 3 -TPD) results showed that Ti-C,N can improve the redox ability but reduces the surface acidity. Co-doping has no effect on surface acidity, but the redox ability is further improved. A suitable amount of Co-doping is beneficial to the optimal catalytic activity of Mn-Ce-Co 0.05 /Ti-C,N catalyst. This suggests a balance between redox properties and surface acidity. Especially for the strong redox ability, it can promote the oxidation of NO to NO 2 , and promote low-temperature NH 3 -SCR through the 'fast SCR' pathway. X-ray photoelectron spectroscopy results of the highest chemisorbed oxygen (O ⊍ ) concentration and relative atomic ratio (Mn 4+ /Mn n+ , Ce 3+ /Ce n+ and Co 3+ /Co n+ ) confirmed the above conclusion. Both the Langmuir-Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms occurred in the NH 3 -SCR reaction over the Mn-Ce-Co 0.05 /Ti-C,N catalyst.

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Section: Xps Analysismentioning

confidence: 77%

C,N‐modified TiO₂‐supported Mn–Ce–Co_x‐based catalyst for low‐temperature NH₃‐SCR

Liu

Sun

et al. 2021

J of Chemical Tech & Biotech

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“…Since Gratzel et al developed a new type of solar cell based on nanocrystalline TiO 2 electrodes, dye-sensitized solar cells (DSSCs) have attracted greater interest due to their high energy conversion efficiency and low-cost alternatives to silicon-based commercial solar cells [30][31][32]. Additionally, the nanocrystalline TiO 2 electrode has a high specific surface area and stability.…”

Section: Battery Performance Analysis Via Cyclic Voltammetric Charge-discharge and Tem Characterizationmentioning

confidence: 99%

Microstructure Characterization and Battery Performance Comparison of MOF-235 and TiO2-P25 Materials

Zhao

Jiang

et al. 2022

Crystals

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The growing interest in energy storage has led to the urgent need for the development of high-performance cathode electrodes. The commercialized materials MOF-235 and TiO2-P25 exhibit characteristics that may be suitable as electrodes but there are inherent challenges that have yet to be addressed in the literature. In this study, a high-pressure hydrothermal synthesized MOF-235 and sol-gel-made TiO2-P25 were tested for battery performance. The results indicate that MOF-235 does not possess the desired performance due to uncontrollable agglomeration. On the other hand, TiO2-P25 showed good cycling life, and the performance can be further optimized by doping and minimizing the particle size. Additionally, SEM and TEM were applied for surface characterization, providing evidence that mesoporous TiO2-25 inhibits photo-generated carrier recombination. The mesoporous energy storage mechanism of those two materials is also discussed. This research will provide technical support for the industrialization of those two mesoporous materials.

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“…TiO 2 is a kind of safe, stable, and cheap material, which has attracted significant research interest [4][5][6][7][8][9]. Photo-catalytic reactions on the semi-conductive surfaces of TiO 2 materials are widely investigated and reported for the purposes of (1) water splitting to produce H 2 and (2) eliminating pollutants from water and air [10][11][12][13][14][15]. Obviously, the direct splitting of water molecules through Photo-electrochemical (PEC) processes is a sustainable green approach to convert water and sunlight to hydrogen and oxygen to achieve [16,17].…”

Section: Introductionmentioning

confidence: 99%

One-Step Preparation of High Performance TiO2/CNT/CQD Nanocomposites Bactericidal Coating with Ultrasonic Radiation

et al. 2023

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As an environmental semiconductor material, TiO2 has important applications in the fields of environmental protection and water treatment. The preparation of P25 particles into nano-functional material films with a high specific surface area has always been a bottleneck limiting its large-scale application. In this paper, a one-step method of preparing TiO2 nanocomposites by doping carbon nanotube (CNT) and carbon quantum dots (CQD) with tetrabutyltitanate and P25 TiO2 under ultrasonic radiation is proposed to synthesize a novel antifouling material, which both eliminates the bacterium of Escherichia coli and shows good photoelectric properties, indicating a great value for the industrial promotion of TiO2/CNT. This mesoporous composite exhibits a high specific surface area of 78.07 M2/g (BET) and a tested pore width range within 10–120 nm. The surface morphology of this composite is characterized by TEM and the microstructure is characterized through XRD. This preparation method can fabricate P25 particles into a nano-functional material film with a high specific surface area at a very low cost.

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One-step preparation of C-doped TiO₂ nanotubes with enhanced photocatalytic activity by a water-assisted method

Abstract: The crystallization of amorphous TiO2 nanotubes which prepared by anodic oxidation was crystallized by water-assisted at low temperature. The crystalline phase and morphology of TiO2 nanotubes were observed by X-ray...

Cited by 20 publications

References 57 publications

C,N‐modified TiO₂‐supported Mn–Ce–Co_x‐based catalyst for low‐temperature NH₃‐SCR

C,N‐modified TiO₂‐supported Mn–Ce–Co_x‐based catalyst for low‐temperature NH₃‐SCR

Microstructure Characterization and Battery Performance Comparison of MOF-235 and TiO2-P25 Materials

One-Step Preparation of High Performance TiO2/CNT/CQD Nanocomposites Bactericidal Coating with Ultrasonic Radiation

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One-step preparation of C-doped TiO2 nanotubes with enhanced photocatalytic activity by a water-assisted method

Abstract: The crystallization of amorphous TiO2 nanotubes which prepared by anodic oxidation was crystallized by water-assisted at low temperature. The crystalline phase and morphology of TiO2 nanotubes were observed by X-ray...

Cited by 20 publications

References 57 publications

C,N‐modified TiO2‐supported Mn–Ce–Cox‐based catalyst for low‐temperature NH3‐SCR

C,N‐modified TiO2‐supported Mn–Ce–Cox‐based catalyst for low‐temperature NH3‐SCR

Microstructure Characterization and Battery Performance Comparison of MOF-235 and TiO2-P25 Materials

One-Step Preparation of High Performance TiO2/CNT/CQD Nanocomposites Bactericidal Coating with Ultrasonic Radiation

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One-step preparation of C-doped TiO₂ nanotubes with enhanced photocatalytic activity by a water-assisted method

C,N‐modified TiO₂‐supported Mn–Ce–Co_x‐based catalyst for low‐temperature NH₃‐SCR

C,N‐modified TiO₂‐supported Mn–Ce–Co_x‐based catalyst for low‐temperature NH₃‐SCR