Solar light-driven photocatalytic degradation of methyl blue by carbon-doped TiO2 nanoparticles

Alkorbi, Ali S.; Javed, Hafiz Muhammad Asif; Hussain, Shahid; Latif, Sana; Mahr, Muhammad Shabir; Mustafa, Mumtaz Begum; Alsaiari, Raiedhah; Alhemiary, Nabil A.

doi:10.1016/j.optmat.2022.112259

Cited by 56 publications

(18 citation statements)

References 23 publications

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“…In addition, it was found that adsorption capacity decreased with the increase in calcination temperature. Previous research demonstrated that the decoration of graphene on TiO 2 increases the pore size and surface area, which ultimately increase the adsorption capacity , …”

Section: Resultsmentioning

confidence: 99%

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO₂

et al. 2023

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Visible light-induced photocatalytic treatment of organic waste is considered a green and efficient route. This study explored the structural and photocatalytic performance of graphene quantum dot (GQD)-incorporated TiO 2 nanocomposites to treat reactive yellow 145 (RY145) dye. For the effective removal of the RY145, efforts were made to better understand the kinetics of the process and optimization of the treatment parameters. Different GQD-doped TiO 2 nanocomposites were synthesized employing the sol−gel method. Physicochemical characteristics of the synthesized nanocomposites were studied through FTIR, XRD, UV− visible spectroscopy, SEM, and EDX. Screening studies were conducted for synthesis and reaction optimization. The results indicated that GQD−TiO 2 significantly enhanced the photocatalytic discoloration for RY145 dye. Among the synthesized nanocomposites, 15GQD−TiO 2 calcined at 300 exhibited 99.3% RY145 discoloration in 30 min under visible light irradiation. Following the pseudo-first-order reaction, the photocatalytic reaction constant K app progressively declined with an increase in the concentration of RY145. The heterogeneous reaction system conformed to the Langmuir−Hinshelwood isotherm, as indicated by the K C (1.08 mg L −1 min −1 ) and the K LH (0.18 L mg −1 ) values. O 2•− was found to be the major contributor in GQD−TiO 2 -300 to decolorize RY154, while TiO 2 and GQDs played a vital role in generation of electrons and holes. Additionally, after recycling to the seventh cycle, only 9% decline in photocatalytic performance was observed for the synthesized nanocomposite.

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Section: Resultsmentioning

confidence: 99%

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO₂

et al. 2023

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“…The traces of this bond could be found in TiO 2 and NSFe–TiO 2 . The bending vibration of the H – O – H molecule is represented by the small peak at 1648 cm −1 (Alkorbi et al 2022 ). The presence of hydroxyl group on the catalysts’ surface played a significant role in improving the photocatalytic activity of the photocatalyst.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic activity of Fe-, S- and N-codoped TiO2 for sulfadiazine degradation

Xin

Liu

Sun

et al. 2023

Int. J. Environ. Sci. Technol.

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The composite material based on N- , S- , and Fe-doped TiO 2 (NSFe-TiO 2 ) synthesized by wet impregnation was used as a photocatalyst to rapidly degrade sulfadiazine. The photocatalytic degradation behavior and mechanism of sulfadiazine on NSFe-TiO 2 were investigated for revealing the role of degradation under ultraviolet light. The results showed that compared with TiO 2 , NSFe-TiO 2 markedly improved the efficiency in photocatalytic degradation of sulfadiazine: more than 90% of sulfadiazine could be removed within 120 min by NSFe-TiO 2 dosage of 20 mg L −1 . The process conformed to first-order reaction kinetics model. The parameters such as loaded amount of NSFe-TiO 2 , solution pH value, humic acid concentration and recycle numbers on removal efficiency were also studied. Compared to neutral and alkaline conditions, acidic condition was not conducive to the photocatalysis. HA, Ca 2+ , Cu 2+ and Zn 2+ in the actual water body had mild inhibition on sulfadiazine degradation in UV/NSFe-TiO 2 system. Fragments screened by high-resolution mass spectrometry were conducted to explore the oxidation mechanism and pathways of sulfadiazine degradation. On the whole, UV/NSFe-TiO 2 photocatalysis has a good effect on sulfadiazine removal. Supplementary Information The online version contains supplementary material available at 10.1007/s13762-023-04771-6.

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“…Oxide nanoparticles have also been used as photocatalysts in different reactions, including Suzuki, Sonogoshira, Ullmann & Stille coupling and C–N coupling . TiO 2 is one of the well-known catalysts with wide applications in photocatalytic reactions. , The popularity of TiO 2 lies in its nontoxicity, high chemical stability, and cost-effectiveness . Xu et al studied the C–N coupling reaction using TiO 2 nanoparticles under 390 nm (85 W) irradiation at room temperature for 36 h with a final yield of 73% …”

Section: Introductionmentioning

confidence: 99%

“…The anatase form of TiO 2 has received more attention due to its greater optical activity . Different properties of TiO 2 , including its energy band gap, surface activity, and efficiency can be modified by the incorporation of other elements into the structure of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Noble-Free Nanophotocatalyst of Ti_xFe_yLa_mO_z for Efficient Photocatalytic C–N Cross-Coupling Reactions under Visible Light

Dehghazi

Absalan

Gholizadeh

et al. 2023

ACS Appl. Nano Mater.

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Nanophotocatalysts are applied for different applications, and their usage has been enhanced remarkably since a decade. On the other hand, cross-coupling reactions of C−N bonds have found increasing popularity for coupling derivatives of organic compounds such as aniline using diverse catalysts. Nanoheterogeneous photocatalysts can offer suitable platforms for the C−N coupling of aniline derivatives. However, the design of a photocatalyst on the nanoscale with remarkable activity and selectivity, made of noble-free elements, is highly welcome. In this study, the half-filled electronic configuration and shallow trapping properties of Fe were employed to reduce the energy band gap of the system. Moreover, the large ionic radius of lanthanide leads to large surface activity. Thus, bi-and trinuclear nano-oxide nanophotocatalysts were synthesized based on the titanium, iron, and lanthanide elements (Ti x Fe y O z , Ti x Fe y La m O z ) to obtain logically designed photocatalysts with high selectivity, durability, and operation speed under visible light. In addition, designing photocatalysts in the nanoscale was the ultimate target of this study to use the highest benefit of the nanoscale, which is high surface activity. The developed nanophotocatalysts were used for coupling aniline and its 10 derivatives under visible light. The mechanism of the migration of electrons and the C−N reaction was also investigated in detail. In addition, both obtained nanophotocatalysts were applied in five different solvents and eight different conditions so the best condition for the reaction could be determined. Furthermore, the photocatalytic mechanism was studied in detail. The final nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray analysis (EDX), inductively coupled plasma mass spectrometry (ICP-MS), Brunauer−Emmett−Teller (BET) surface activity, Barrett−Joyner− Halenda (BJH) method, UV−vis spectroscopy, photoluminescence emission spectra, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), NMR spectra, mass spectra, and CHN elemental analysis. Both nanocomposites exhibited high photocatalytic activities in coupling aniline and its derivatives under visible light. However, the Ti x Fe y La m O z nanophotocatalyst showed a higher activity (90% conversion to obtain 2,4 dinitro-n-phenylaniline) than the Ti x Fe y O z nanophotocatalyst (68% conversion to obtain 2,4 dinitro-n-phenylaniline), which is mainly due to its higher surface activity because of its lanthanide content.

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Solar light-driven photocatalytic degradation of methyl blue by carbon-doped TiO2 nanoparticles

Cited by 56 publications

References 23 publications

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO₂

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO₂

Enhanced photocatalytic activity of Fe-, S- and N-codoped TiO2 for sulfadiazine degradation

Noble-Free Nanophotocatalyst of Ti_xFe_yLa_mO_z for Efficient Photocatalytic C–N Cross-Coupling Reactions under Visible Light

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Solar light-driven photocatalytic degradation of methyl blue by carbon-doped TiO2 nanoparticles

Cited by 56 publications

References 23 publications

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO2

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO2

Enhanced photocatalytic activity of Fe-, S- and N-codoped TiO2 for sulfadiazine degradation

Noble-Free Nanophotocatalyst of TixFeyLamOz for Efficient Photocatalytic C–N Cross-Coupling Reactions under Visible Light

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Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO₂

Visible Light-Induced Reactive Yellow 145 Discoloration: Structural and Photocatalytic Studies of Graphene Quantum Dot-Incorporated TiO₂

Noble-Free Nanophotocatalyst of Ti_xFe_yLa_mO_z for Efficient Photocatalytic C–N Cross-Coupling Reactions under Visible Light