Carbonaceous–TiO2 materials: unique morphologies for photocatalytic applications

Sui, Xianhang; Li, Xian‐Hua; Ni, Ting; Lin, Fengsen; Guang-you, LI

doi:10.1007/s10853-019-04224-x

Cited by 10 publications

(3 citation statements)

References 73 publications

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“…The presence of rGO in the composites causes a decrease in the PL intensity, depending on its loading. This behavior could be explained by suppressing the electron–hole recombination in the TiO 2 [ 39 ]. Additionally, the peaks at PL spectra can be ascribed to several defects due to self-trapped excitons, oxygen vacancies, or other surface states [ 40 ].…”

Section: Resultsmentioning

confidence: 99%

Enhancing Free Cyanide Photocatalytic Oxidation by rGO/TiO2 P25 Composites

et al. 2022

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Graphene-TiO2 composites have been investigated in various photocatalytic reactions showing successful synergy compared to pristine TiO2. In the present work, graphene oxide (GO) was synthesized by the Hummers method and then reduced graphene oxide-TiO2 composites (rGO/TiO2) were obtained by an in situ GO photoreduction route. X-ray diffraction, FTIR, Raman, UV–vis DRS, and photoluminescence were the main characterization techniques. The obtained composites containing 1 and 3 wt.% rGO were evaluated in the cyanide (50 mg/L) oxidation and Au-cyanide complex (300 mg/L) degradation under UV-A light. The composites showed higher photocatalytic activity than TiO2, mainly with the 1% rGO content. Cyanate and gold nanoparticles, deposited on the photocatalyst’s surface, were the main byproducts during the photocatalyst assessment. The improved photocatalytic activity of the composites was attributed to a higher rate of electron transfer and a lower rate of charge recombination due to the chemical interaction of rGO with TiO2.

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Section: Resultsmentioning

confidence: 99%

Enhancing Free Cyanide Photocatalytic Oxidation by rGO/TiO2 P25 Composites

et al. 2022

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“…Therefore, it is very necessary to develop new materials and methods to effectively reduce or remove these organic pollutants. [7] Studies have been conducted to develop highly efficient adsorption processes, including adsorption, [8][9][10][11][12] coagulation, [13,14] precipitation, [13,15] membrane separation, [16][17][18] chemical oxidation, [19][20][21] photocatalytic DOI: 10.1002/adsu.202300340 degradation, [22,23] and electrocatalysis. [24] Among various methods, adsorption method has drawn increasing attentions due to the wide range of applications, facile operation, high efficiency and low cost.…”

Section: Introductionmentioning

confidence: 99%

Biomass‐Derived Carbon Materials for the Adsorption of Organic Pollutants

Qiu,

Li,

et al. 2023

Advanced Sustainable Systems

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With the development of economy and increasing environmental awareness, how to effectively remove organic pollutants in wastewater is a research hotspot. Adsorption is one of the effective methods, and the adsorption material is the key factor to determine the efficiency. In this review, biomass‐derived carbon materials as adsorbents of organic pollutants and the adsorption mechanism are discussed in depth. The effects of carbonization and activation on the morphology and structure of carbon materials; the modification strategies of carbon adsorbents, the adsorption performance of biomass‐derived carbon materials for organic pollutants are described and illustrated; the future work of the biomass‐derived carbon materials is proposed.

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“…However, although thoroughly studied, TiO2 presents limitations to large scale applications, such as the need for radiation in the ultraviolet (UV) region for a band gap of 3.2 eV and the rapid recombination of the electron/hole pair beyond the difficulty of separation and regeneration after the process. Thus, it is necessary to develop alternative systems based on TiO2 with better photocatalytic properties in relation to commercial oxide, thus increasing the possibility of use in the treatment of effluents [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photocatalytic activity of a composite based on TiO2 and active carbon prepared from mango pit

et al. 2021

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In this study, results are presented concerning the development of alternative materials based on titanium dioxide (TiO2) and agro-industrial waste for use in the treatment of effluent contaminated with dyes. The photocatalytic activity of a composite formed by the association of activated carbon, obtained from pit residue of mango, with modified titanium dioxide was evaluated by the degradation of crystal violet dye. From the analysis of X-rays diffratograms, it was observed that the modification introduced in the TiO2, as well as the formation of the composite with activated carbon, lead to wider peaks with lesser intensity, suggesting the formation of small particles. The composite presented the best photocatalytic performance, attributed to the significantly large specific area of this material when compared to pure TiO2, reaching 99% degradation of the organic matter after 60 minutes of reaction time. This is, therefore, a promising material for environmental photocatalysis.

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Carbonaceous–TiO2 materials: unique morphologies for photocatalytic applications

Cited by 10 publications

References 73 publications

Enhancing Free Cyanide Photocatalytic Oxidation by rGO/TiO2 P25 Composites

Enhancing Free Cyanide Photocatalytic Oxidation by rGO/TiO2 P25 Composites

Biomass‐Derived Carbon Materials for the Adsorption of Organic Pollutants

Synthesis, characterization and photocatalytic activity of a composite based on TiO2 and active carbon prepared from mango pit

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