P-doped TiO2-MWCNTs nanocomposite thin films with enhanced photocatalytic activity under visible light exposure

Sarker, Dali Rani; Uddin, Md. Nizam; Elias, Md.; Rahman, Zidnia; Paul, Ratul; Siddiquey, Iqbal Ahmed; Hasnat, Mohammad A.; Karim, Rezaul; Arafath, Md. Azharul; Uddin, Jamal

doi:10.1016/j.clet.2021.100364

Cited by 15 publications

(5 citation statements)

References 40 publications

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“…Crystal size is one of the important factors influencing the photocatalytic activity of the material. The crystal size was estimated based on the effective crystal dimension D computed using Debye-Scherrer equation [30,31];…”

Section: Resultsmentioning

confidence: 99%

A New Study on the Effect of Pure Anatase TiO2 Film Thickness on Gentian Violet Photodegradation Under Sunlight: Considering the Effect of Hole Scavengers

et al. 2022

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In this paper, pure anatase TiO2 thin films were grown on glass substrates by using sol-gel dip-coating method. To study the physical, chemical and optical properties of the deposits, TiO2 thin films were synthesized with thickness (241.5, 258.19, 230.33 and 302.35 nm). XRD patterns show that TiO2 films were grown with unique anatase phase (101). The photocatalytic test shows that film (~ 302 nm) gives high photodegradation of gentian violet (GV) under sunlight irradiation due to the low number of defect sites. The increase in film thickness and the decrease of surface roughness and crystal size decrease the number of defect sites in the material which lead to low recombination rate of charge carriers. The use of Ag+ as hole scavenger increases the photocatalytic activity 4.75 times within the first hour. The photocatalysis process showed that Ag+ can be reduced on the surface of photoactivated TiO2 thin films to obtain sun-photodeposited/dip-coated AgO/TiO2 (p-n) heterojunction. HIGHLIGHTS Pure anatase TiO2 thin films were successfullysynthesized via sol-gel dip-coating method High thickness (302 nm) of TiO2 thin film exhibits high photocatalytic activity for photodegradation of GV under sunlight irradiation The presence of Ag+ in wastewater shows high photocatalytic activity of TiO2 films with 4.75 times within the first hour The possibility of sun-photodeposited/dip-coated of (p-n) AgO/TiO2 heterojunction is discussed GRAPHICAL ABSTRACT

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Section: Resultsmentioning

confidence: 99%

A New Study on the Effect of Pure Anatase TiO2 Film Thickness on Gentian Violet Photodegradation Under Sunlight: Considering the Effect of Hole Scavengers

et al. 2022

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“…Harling et al [15] employed a packed-bed plasma reactor operating at atmospheric pressure and non-thermal conditions to investigate the impact of temperature on the plasma-catalytic process. Sarker et al [16] conducted a study on the impact of phosphorus P-doping and the incorporation of multi-walled carbon nanotubes into a TiO2 matrix, which was utilized for producing thin films of the photocatalyst. Plasma catalysis exhibited superior efficacy in benzene and toluene degradation compared with traditional thermal catalysis and plasma treatment alone.…”

Section: Synthesis Of Metal-based Catalystmentioning

confidence: 99%

A review of cold plasma for catalyst synthesis and modification

Tian,

Bi,

Lin

et al. 2024

Clean Energy Sci. Technol.

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Cold plasma has been extensively studied and developed in the field of energy storage and conversion, with a focus on its ability to assist in catalyst synthesis, surface modification, the introduction of heteroatoms, the generation of defects and vacancies, the improvement of catalyst dispersion, and the reduction of particle size. In contrast to conventional calcination and chemical methods, the energy from cold plasma can be transferred directly to the catalyst and carrier during the treatment process, which can improve the interaction between the loaded catalyst and carrier by changing the internal structure and surface morphology of the catalyst. Therefore, these properties make cold plasma quite green, safe, and efficient for catalyst synthesis and modification. In this paper, the characteristics and applications of various cold plasma technologies, as well as the synergistic treatment of cold plasma technology with thermodynamic principles on catalysts, are analyzed. Based on current research progress, this paper provides a summary and outlook on the synthesis and modification of catalysts using cold plasma.

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“…Figure 8(a) shows the analysis and comparison of commercial TiO 2 and self-made TiO 2 samples before and after surface modification of alkali solution. Both TpH-7 and TpH-11.5 have an obvious absorption peak at 551cm -1 , corresponding to the characteristic peak of TiO 2 [14] ; The corresponding peak at 1633cm -1 and 3433cm -1 is OH▪ (hydroxy), which is due to the fact that TiO 2 itself contains a small amount of OH▪. It shows that commercial TiO 2 does not introduce other organic substances or functional groups before and after surface modification of alkali solution.…”

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

Preparation of modified TiO2 and its photocatalytic properties

2023

AJMC

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In this chapter, tetrabutyl titanate was used as the titanium source, and the photocatalytic performance of commercial TiO 2 and self-made TiO 2 was compared by sol-gel method. Since ready-made commercial TiO 2 is not easy to be doped and modified, this chapter also performs alkali solution surface modification at the same time as self-made TiO 2 (that is, the TiO 2 to be modified is immersed in alkali solution at different pH values and then dried), and the photocatalytic performance of the two before and after the surface modification of alkali solution is compared. In order to improve the photocatalytic performance of self-made TiO 2 , this chapter modifies the iron doping of self-made TiO 2 during the preparation process to enhance its photocatalytic performance. After iron doping modification of TiO 2 , in order to further improve its performance, the modified sample was modified with alkali solution surface. In this paper, the microscopic characterization and nitrogen and oxygen catalytic performance tests of each sample were carried out, and the results showed that the photocatalytic performance of self-prepared TiO 2 was significantly better than that of commercial TiO 2 . Among the TiO 2 modified by different pH solutions, the catalytic performance was the best at pH 11.5, and the photocatalytic performance of Fe-doped TiO 2 was also improved to varying degrees compared with pure TiO 2 , among which Fe doping 0.5% contributed the most to the photocatalytic performance. After the surface modification of Fe (0.5%)-TiO 2 with the best doping amount by alkali solution, the photocatalytic performance was also improved.

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P-doped TiO2-MWCNTs nanocomposite thin films with enhanced photocatalytic activity under visible light exposure

Cited by 15 publications

References 40 publications

A New Study on the Effect of Pure Anatase TiO2 Film Thickness on Gentian Violet Photodegradation Under Sunlight: Considering the Effect of Hole Scavengers

A New Study on the Effect of Pure Anatase TiO2 Film Thickness on Gentian Violet Photodegradation Under Sunlight: Considering the Effect of Hole Scavengers

A review of cold plasma for catalyst synthesis and modification

Preparation of modified TiO2 and its photocatalytic properties

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