One-Pot Route towards Active TiO2 Doped Hierarchically Porous Cellulose: Highly Efficient Photocatalysts for Methylene Blue Degradation

Sun, Xiaoxia; Wang, Kunpeng; Shu, Yu; Zou, Fangdong; Zhang, Bo‐xing; Sun, Guangai; Uyama, Hiroshi; Wang, Xinhou

doi:10.3390/ma10040373

Cited by 16 publications

(3 citation statements)

References 32 publications

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“…Film forms of cellulose/carrageenan/TiO 2 [ 26 ], cellulose/N-doped TiO 2 [ 27 ], and cellulose/graphene oxide (GO)/TiO 2 [ 28 ] composites were prepared to degrade methylene blue (MB). Wittmar et al [ 29 ] fabricated cellulose/TiO 2 /Fe 3 O 4 macrospheres using a mixture of [Emim][Ac] and dimethylsulfoxide (DMSO) to degrade rhodamine B. Monolithic forms of cellulose/TiO 2 [ 30 ], cellulose/carboxymethyl cellulose/TiO 2 /Fe 3 O 4 [ 31 ], and cellulose/Cu 2 O/TiO 2 /reduced graphene oxide (rGO) [ 32 ] composites were prepared and used for the degradation of MB and methyl orange (MO).…”

Section: Introductionmentioning

confidence: 99%

Development of Blended Biopolymer-Based Photocatalytic Hydrogel Beads for Adsorption and Photodegradation of Dyes

Weon

Han

Choi

et al. 2023

Gels

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Blended biopolymer-based photocatalytic hydrogel beads were synthesized by dissolving the biopolymers in 1-ethyl-3-methylimidazolium acetate ([Emim][Ac]), adding TiO2, and reconstituting the beads with ethanol. The incorporation of modifying biopolymer significantly enhanced the adsorption capacity of the cellulose/TiO2 beads. Cellulose/carrageenan/TiO2 beads exhibited a 7.0-fold increase in adsorption capacity for methylene blue (MB). In contrast, cellulose/chitosan/TiO2 beads showed a 4.8-fold increase in adsorption capacity for methyl orange (MO) compared with cellulose/TiO2 beads. In addition, cellulose/TiO2 microbeads were prepared through the sol–gel transition of the [Emim][Ac]-in-oil emulsion to enhance photodegradation activity. These microbeads displayed a 4.6-fold higher adsorption capacity and 2.8-fold higher photodegradation activity for MB than the millimeter-sized beads. Furthermore, they exhibited superior dye removal efficiencies for various dyes such as Congo red, MO, MB, crystal violet, and rhodamine B, surpassing the performance of larger beads. To expand the industrial applicability of the microbeads, biopolymer/TiO2 magnetic microbeads were developed by incorporating Fe2O3. These magnetic microbeads outperformed millimeter-sized beads regarding the efficiency and time required for MB removal from aqueous solutions. Furthermore, the physicochemical properties of magnetic microbeads can be easily controlled by adjusting the type of biopolymer modifier, the TiO2 and magnetic particle content, and the ratio of each component based on the target molecule. Therefore, biopolymer-based photocatalytic magnetic microbeads have great potential not only in environmental fields but also in biomedical fields.

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Section: Introductionmentioning

confidence: 99%

Development of Blended Biopolymer-Based Photocatalytic Hydrogel Beads for Adsorption and Photodegradation of Dyes

Weon

Han

Choi

et al. 2023

Gels

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“…An interesting approach is the synthesis of Ti-carbon composites [ 14 ] due to a better dispersion of Ti-nanoparticles, a well-developed porosity (enhanced pollutants adsorption) and the band gap narrowing by the synergism between phases. The employ of biomass, in particular cellulose [ 19 ], as support or carbon source is a remarkable alternative to prepare Ti–carbon photocatalysts, because it is the cheapest and most abundant biopolymer [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

On the Interactions and Synergism between Phases of Carbon–Phosphorus–Titanium Composites Synthetized from Cellulose for the Removal of the Orange-G Dye

et al. 2018

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Carbon–phosphorus–titanium composites (CPT) were synthesized by Ti-impregnation and carbonization of cellulose. Microcrystalline cellulose used as carbon precursor was initially dissolved by phosphoric acid (H3PO4) to favor the Ti-dispersion and the simultaneous functionalization of the cellulose chains with phosphorus-containing groups, namely phosphates and polyphosphates. These groups interacted with the Ti-precursor during impregnation and determined the interface transformations during carbonization as a function of the Ti-content and carbonization temperature. Amorphous composites with high surface area and mesoporosity were obtained at low Ti-content (Ti:cellulose ratio = 1) and carbonization temperature (500 °C), while in composites with Ti:cellulose ratio = 12 and 800 °C, Ti-particles reacted with the cellulose groups leading to different Ti-crystalline polyphosphates and a marked loss of the porosity. The efficiency of composites in the removal of the Orange G dye in solution by adsorption and photocatalysis was discussed based on their physicochemical properties. These materials were more active than the benchmark TiO2 material (Degussa P25), showing a clear synergism between phases.

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“…Titania is one of the most important and widely studied inorganic materials, with a broad range of applications such as pigmenting, gas sensors, corrosion protection, optical coatings, solar cells, and photocatalysis. , TiO 2 can be prepared as films, rods, or nanoparticles as required for the desired applications. For the preparation of catalytically active TiO 2 nanoparticles at a larger scale, many methods have been developed, but the only ones of industrial importance are flame pyrolysis and chemical vapor synthesis. , Cellulose-based TiO 2 nanocomposite materials, combining the advantages of a green support with the photocatalytic properties of the TiO 2 , are currently intensely studied for applications in photocatalysis, − water purification, , or self-cleaning materials …”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and Magnetic Porous Cellulose-Based Nanocomposite Films Prepared by a Green Method

Wittmar

Ulbricht

2017

ACS Sustainable Chem. Eng.

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The present work expands our previous studies related to cellulose processing with room-temperature ionic liquids and simultaneous integration of functional nanoparticles toward photocatalytically active and easily recyclable nanocomposite porous films based on a renewable matrix material. Porosity can be tuned by the selection of phase separation conditions for the films obtained from the casting solutions of cellulose in ionic liquids or their mixture with an organic cosolvent. TiO 2 nanoparticles confer to the nanocomposite photocatalytic activity, while Fe 3 O 4 nanoparticles make it magnetically active. The photocatalytic activity of the cellulose film containing 10 mg of TiO 2 was 1 order of magnitude lower than that of the same amount of pure TiO 2 nanopowder, due to the reduction of the active catalytic surface which can be reached by UV irradiation after embedment in the polymer matrix. However, this fixation in a solid polymer support allows facile recovery of the catalyst after use. The rate constant when using the cellulose nanocomposite doped with TiO 2 and Fe 3 O 4 (k ≈ 0.0019 min −1 ) is very close to that for the corresponding composite containing only TiO 2 (k ≈ 0.0017 min −1 ), suggesting that co-doping with Fe 3 O 4 nanoparticles did not diminish the photocatalytic activity of the final composite, which can be easily separated from solution with a magnet. Additionally, by Fe 3 O 4 doping, the composite material's temperature can be homogeneously increased by ∼12 K via exposure to a high-frequency alternating magnetic field (AMF) for 5 min. For an optimal thermal response to AMF, the magnetite nanoparticles have to be homogeneously dispersed within the polymer matrix. The preparation method for the casting solution has been found to play an essential role for the one-step fabrication of multifunctional cellulose-based nanocomposite materials.

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One-Pot Route towards Active TiO2 Doped Hierarchically Porous Cellulose: Highly Efficient Photocatalysts for Methylene Blue Degradation

Cited by 16 publications

References 32 publications

Development of Blended Biopolymer-Based Photocatalytic Hydrogel Beads for Adsorption and Photodegradation of Dyes

Development of Blended Biopolymer-Based Photocatalytic Hydrogel Beads for Adsorption and Photodegradation of Dyes

On the Interactions and Synergism between Phases of Carbon–Phosphorus–Titanium Composites Synthetized from Cellulose for the Removal of the Orange-G Dye

Photocatalytic and Magnetic Porous Cellulose-Based Nanocomposite Films Prepared by a Green Method

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