Sol–gel synthesis of carbon-doped TiO<sub>2</sub> nanoparticles based on microcrystalline cellulose for efficient photocatalytic degradation of methylene blue under visible light

Habibi, Saba; Jamshidi, Masoud

doi:10.1080/09593330.2019.1604815

Cited by 40 publications

(3 citation statements)

References 71 publications

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“…The research carried out led to the isolation of micro-grained powders of TOCs containing {Ti 3 O} ((1) and ( 2)) and {Ti 4 O 2 } ((3) and (4)} cores, in which the absorption maximum was shifted towards the UVA-Vis range in comparison to TiO 2 (UV, λ max = 300-350 nm [43]). The type of the carboxylate ligand, which stabilizes the {Ti a O b } core, influences the HOMO-LUMO gap values (∆E), i.e., ∆E (1) and (2) < ∆E (3) and (4).…”

Section: Discussionmentioning

confidence: 99%

Oxo-Titanium(IV) Complex/Polymer Composites—Synthesis, Spectroscopic Characterization and Antimicrobial Activity Test

Piszczek

Kubiak

Golińska

et al. 2020

IJMS

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The emergence of a large number of bacterial strains resistant to many drugs or disinfectants currently used contributed to the search of new, more effective antimicrobial agents. In the presented paper, we assessed the microbiocidal activity of tri- and tetranuclear oxo-titanium(IV) complexes (TOCs), which were dispersed in the poly(methyl methacrylate) (PMMA) matrix. The TOCs were synthesized in reaction to Ti(OR)4 (R = iPr, iBu) and HO2CR’ (R’ = 4-PhNH2 and 4-PhOH) in a 4:1 molar ratio at room temperature and in Ar atmosphere. The structure of isolated oxo-complexes was confirmed by IR and Raman spectroscopy and mass spectrometry. The antimicrobial activity of the produced composites (PMMA + TOCs) was estimated against Gram-positive (Staphylococcus aureus ATCC 6538 and S. aureus ATCC 25923) and Gram-negative (Escherichia coli ATCC 8739 and E. coli ATCC 25922) bacteria and yeasts of Candida albicans ATCC 10231. All produced composites showed biocidal activity against the bacteria. Composites containing {Ti4O2} cores and the {Ti3O} core stabilized by the 4-hydroxybenzoic ligand showed also high activity against yeasts. The results of investigations carried out suggest that produced (PMMA + TOCs) composites, due to their microbiocidal activity, could find an application in the elimination of microbial contaminations in various fields of our lives.

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Section: Discussionmentioning

confidence: 99%

Oxo-Titanium(IV) Complex/Polymer Composites—Synthesis, Spectroscopic Characterization and Antimicrobial Activity Test

Piszczek

Kubiak

Golińska

et al. 2020

IJMS

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“…When oxygen is replaced with sulfur in the ZnO structure and S-doped ZnO fabrication, the photocatalytic activity improves due to the creation of sulfur defects in the photocatalytic lattice. 192 Microcrystalline cellulose (MCC), 198 poly(vinyl alcohol) (PVA), 199 glucose, 200 Ti 3 C 2 MXene, 201 ethanol, ethylene, triethanolamine, ethylene glycol, resorcinol-formaldehyde, acetylacetone, cyclohexanol, oleylamine, and activated carbon are among the employed carbon sources; 202 urea, ammonium acetate, 194 hydrazine, 203 and glycine 204 are used as nitrogen sources; thiourea is used as a sulfur and nitrogen source; 35 , 205 and boric acid is used as a boron source. 205 Negi et al 202 synthesized TiO 2 nanoparticles doped with elemental carbon by the sol–gel method.…”

Section: Photocatalystsmentioning

confidence: 99%

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Ghamarpoor,

Fallah,

Jamshidi

2024

ACS Omega

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The environment being surrounded by accumulated durable waste organic compounds has become a critical crisis for human societies. Generally, organic effluents of industrial plants released into the water source and air are removed by some physical and chemical processes. Utilizing photocatalysts as cost-effective, accessible, thermally/ mechanically stable, nontoxic, reusable, and powerful UV-absorber compounds creates a new gateway toward the removal of dissolved, suspended, and gaseous pollutants even in trace amounts. TiO 2 and ZnO are two prevalent photocatalysts in the field of removing contaminants from wastewater and air. Structural modification of the photocatalysts with metals, nonmetals, metal ions, and other semiconductors reduces the band gap energy and agglomeration and increases the affinity toward organic compounds in the composite structures to expand their usability on an industrial scale. This increases the extent of light absorbance and improves the photocatalytic efficiency. Selecting a suitable synthesis method is necessary to prepare a target photocatalyst with distinct properties such as high specific surface area, numerous surface functional groups, and an appropriate crystalline phase. In this Review, significant parameters for the synthesis and modification of TiO 2 -and ZnO-based photocatalysts are discussed in detail. Several proposed mechanistic routes according to photocatalytic composite structures are provided. Some electrochemical analyses using charge carrier trapping agents and delayed recombination help to plot mechanistic routes according to the direction of photoexcited species (electron−hole pairs) and design more effective photocatalytic processes in terms of cost-effective photocatalysts, saving time and increasing productivity.

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“…Compared with other carbon sources, cellulose is more available in nature, which can reduce the cost of producing carbon materials significantly. In recent years, there have been many reports on the application of cellulose-based carbon (CBC) as a carbon material in the field of supercapacitors and photocatalytic degradation by taking advantage of its excellent properties, such as its porous structure, huge specific surface area, and ability to adsorb gas molecules and macromolecular pollutants [24][25][26][27][28]. However, there is little research on carbonizing cellulose into biomass carbon materials into ZnO-based gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Zinc Oxide-Loaded Cellulose-Based Carbon Gas Sensor for Selective Detection of Ammonia

Xu,

Gong,

Huo

et al. 2023

Nanomaterials

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Cellulose-based carbon (CBC) is widely known for its porous structure and high specific surface area and is liable to adsorb gas molecules and macromolecular pollutants. However, the application of CBC in gas sensing has been little studied. In this paper, a ZnO/CBC heterojunction was formed by means of simple co-precipitation and high-temperature carbonization. As a new ammonia sensor, the prepared ZnO/CBC sensor can detect ammonia that the previous pure ZnO ammonia sensor cannot at room temperature. It has a great gas sensing response, stability, and selectivity to an ammonia concentration of 200 ppm. This study provides a new idea for the design and synthesis of biomass carbon–metal oxide composites.

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Sol–gel synthesis of carbon-doped TiO₂ nanoparticles based on microcrystalline cellulose for efficient photocatalytic degradation of methylene blue under visible light

Cited by 40 publications

References 71 publications

Oxo-Titanium(IV) Complex/Polymer Composites—Synthesis, Spectroscopic Characterization and Antimicrobial Activity Test

Oxo-Titanium(IV) Complex/Polymer Composites—Synthesis, Spectroscopic Characterization and Antimicrobial Activity Test

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Zinc Oxide-Loaded Cellulose-Based Carbon Gas Sensor for Selective Detection of Ammonia

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Sol–gel synthesis of carbon-doped TiO2 nanoparticles based on microcrystalline cellulose for efficient photocatalytic degradation of methylene blue under visible light

Cited by 40 publications

References 71 publications

Oxo-Titanium(IV) Complex/Polymer Composites—Synthesis, Spectroscopic Characterization and Antimicrobial Activity Test

Oxo-Titanium(IV) Complex/Polymer Composites—Synthesis, Spectroscopic Characterization and Antimicrobial Activity Test

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO2-Based Photocatalysts for Photodegradation of Contaminants

Zinc Oxide-Loaded Cellulose-Based Carbon Gas Sensor for Selective Detection of Ammonia

Contact Info

Product

Resources

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Sol–gel synthesis of carbon-doped TiO₂ nanoparticles based on microcrystalline cellulose for efficient photocatalytic degradation of methylene blue under visible light

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants