Enhanced photocatalytic performance of TiO2–carbon nanocomposite

Kuldeep, A. R.; Bhosale, A. S.; Garadkar, K. M.

doi:10.1007/s10854-020-03434-3

Cited by 10 publications

(5 citation statements)

References 45 publications

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“…8 . During adsorption-desorption equilibration, MO molecules adsorb on the catalyst's surface [ 28 ]. When light is incident on the composite material, it generates electron-hole pairs through photoexcitation.…”

Section: Resultsmentioning

confidence: 99%

ZnO-based heterojunction catalysts for the photocatalytic degradation of methyl orange dye

Ashiegbu,

Potgieter

2023

Heliyon

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Section: Resultsmentioning

confidence: 99%

ZnO-based heterojunction catalysts for the photocatalytic degradation of methyl orange dye

Ashiegbu,

Potgieter

2023

Heliyon

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“…Interestingly, we also noticed that increasing the molar ratio of AC relative to TiO 2 in the composite resulted in the change from the standard‐order to pseudo‐order kinetic models. This phenomenon was likely caused by the higher catalyst surface area [50] in the composites for photocatalytic reaction compared to pure TiO 2 (Table 1, 281.43 vs . 177.19 m 2 g −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…Figure 2(a) shows the qualitative analysis of the surface functional groups of AC samples to investigate the interaction between AC and TiO 2 based on the recorded FTIR spectra. Referring to the absorption bands, we noticed (a) at 3,486 cm À 1 , the OÀ H stretching of the hydroxyl group was likely due to the absorbed moisture, [36] (b) at 2,936 cm À 1 , the carbon-hydrogen interaction stretching was because of CÀ H groups, [37] (c) at 1,644 and 1,452 cm À 1 , the carbon-hydrogen interaction stretching was because of CH 2 and CH 3 deformation, [38] (d) at 1,622 cm À 1 , the peak was likely due to the elongation of titanium carboxylate from the by-product of TTIP and ethanol used in the sol-gel-mediated synthesis process, [39] (e) at 1,056 cm À 1 , the ring vibration in an aromatic compound was mainly present in carbonaceous materials like AC, [40] (f) at 812 cm À 1 , the peak represents the stretching of the TiÀ OÀ Ti bond, matching the characteristic attribute of the formation of TiO 2 particles, [41] and (g) at 484 cm À 1 , the TiÀ OÀ Ti stretching vibration reflects the characteristic of the TiO 2 crystal structure. [42] We also observed several other peaks at different wavenumbers for the prepared AC/TiO 2 composites.…”

Section: Functional Groups and Crystal Structurementioning

confidence: 99%

Enhanced Ponceau‐4R and Brilliant Blue Degradation using Mesoporous TiO₂ Nanoparticles with Activated Carbon as Support Material

Ernawati,

Hing Wong,

Amrullah

et al. 2023

ChemistrySelect

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Biomass wastes are inexpensive and readily available to be converted to activated carbon (AC) support material for photocatalysts. This work first synthesized the AC from tamarind fruit shells and then dispersed TiO2 nanoparticles onto the AC to generate AC/TiO2 composites via the ultrasonic‐assisted sol‐gel method. Most TiO2 nanoparticles were uniformly distributed and deposited onto the AC, forming four stable different AC/TiO2 composites. Compared to the pure TiO2 (i. e., 177.19 m2 g−1), the optimal AC/TiO2 (1 : 5) composite exhibited significantly higher specific surface area (i. e., 281.43 m2 g−1). TiO2 anatase phase in the composite enhanced the photocatalytic activity. AC/TiO2 (1 : 5) also exhibited the Pseudo‐Second‐Order Type 1 model, yielding the best dye degradation kinetic fitting of up to 98.4 % under ultraviolet (UV) light. A possible photocatalytic mechanism of dye degradation was proposed. This work provides insights into synthesizing a TiO2 composite using a low‐cost and readily available AC as a support material to promote the photocatalytic activity.

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“…Figure 3a represents the UV-Vis DRS spectra of the procured g-C 3 N 4 , TiO 2 , and GNT composite. The bare g-C 3 N 4 nanosheets acquired a typical edge of absorption at 473 nm approaching the very small bandgap energy (2.62 eV) [32], on the opposite side the TiO 2 band edge is obtained at a wavelength at 394 nm, which means large bandgap energy (3.14 eV) [33]. The g-C 3 N 4 is a visible light active photocatalyst [34].…”

Section: Uv-vis Diffuse Reflectance Spectramentioning

confidence: 99%

Development of g-C3N4-TiO2 visible active hybrid photocatalyst for the photodegradation of methyl orange

Kuldeep

Dhabbe²,

Garadkar

2021

Res Chem Intermed

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In this paper, we report the synthesis of g-C 3 N 4 -TiO 2 hybrid photocatalyst by using the simple, cost-effective and eco-friendly process. The development of TiO 2 nanoflakes on the surface of g-C 3 N 4 nanosheet was carried out by the in situ sol-gel method. The XRD patterns reveal the anatase phase of TiO 2 in the g-C 3 N 4 -TiO 2 nanocomposite. HR-TEM images confirm the size of the nanoflakes in the range of 15-25 nm. The O-Ti and Ti-O-Ti bridge produces the absorption band from 560 to 710 cm −1 for TiO 2 ; it is due to stretching vibrations and the specific band at 805 cm −1 marks the sym-triazine ring of g-C 3 N 4 . UV-Vis spectra show a redshift from 394 to 471 nm in the nanocomposite concerning a decrease in band gap. From BET, it is seen that the surface area of bare TiO 2 and g-C 3 N 4 -TiO 2 are 66 and 146 m 2 g −1 , respectively. The nanoflakes morphology of g-C 3 N 4 -TiO 2 was confirmed from FE-SEM images. The EDS spectrum confirms C, N, Ti, and O elements which prove the purity of the nanocomposite. The g-C 3 N 4 -TiO 2 (1:4) acquired a noticeable enhancement of photocatalytic activity which is double for methyl orange degradation than TiO 2 .

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Enhanced photocatalytic performance of TiO2–carbon nanocomposite

Cited by 10 publications

References 45 publications

ZnO-based heterojunction catalysts for the photocatalytic degradation of methyl orange dye

ZnO-based heterojunction catalysts for the photocatalytic degradation of methyl orange dye

Enhanced Ponceau‐4R and Brilliant Blue Degradation using Mesoporous TiO₂ Nanoparticles with Activated Carbon as Support Material

Development of g-C3N4-TiO2 visible active hybrid photocatalyst for the photodegradation of methyl orange

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Enhanced photocatalytic performance of TiO2–carbon nanocomposite

Cited by 10 publications

References 45 publications

ZnO-based heterojunction catalysts for the photocatalytic degradation of methyl orange dye

ZnO-based heterojunction catalysts for the photocatalytic degradation of methyl orange dye

Enhanced Ponceau‐4R and Brilliant Blue Degradation using Mesoporous TiO2 Nanoparticles with Activated Carbon as Support Material

Development of g-C3N4-TiO2 visible active hybrid photocatalyst for the photodegradation of methyl orange

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Enhanced Ponceau‐4R and Brilliant Blue Degradation using Mesoporous TiO₂ Nanoparticles with Activated Carbon as Support Material