Comprehensive analysis (aerobic/anaerobic, molecular recognitions, band-position and degradation-mechanism) of undoped and Co-doped anatase-brookite - An experimental/theoretical evaluation of the less-studied TiO2 mixed phase

Paz, C.V.; Fereidooni, Mohammad; Praserthdam, Piyasan; Praserthdam, Supareak; Farfán, N.; Márquez, Victor

doi:10.1016/j.envres.2023.115968

Cited by 3 publications

(1 citation statement)

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“…[15][16][17] Therefore, many synthesis strategies have been investigated to construct heterostructures of mixed phases to optimize the photocatalytic performance of TiO 2 . [18][19][20][21][22] In this minireview, we summarized the characteristics and formation conditions of the three types of TiO 2 crystal phases, as well as the phase transfer strategies for constructing TiO 2 heterojunctions are concluded (Figure 1). Amongst, particular emphasis is placed on the phase transfer strategies of high temperature, heteroatom doping and MOF mediated phase transformation.…”

Section: Introductionmentioning

confidence: 99%

Phase Transformation Strategies for the Construction of Heterojunction TiO₂ Photocatalysts

Wang,

Song,

2024

ChemCatChem

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Heterojunction TiO2 has attracted great attention in photocatalytic applications due to its high efficiency in the separation of photogenerated electron‐hole pairs and strong ability of light absorption. This work concisely summarizes the distinct crystal phases of TiO2 and elucidates the prevalent methods employed in the synthesis of TiO2 heterojunctions. Furthermore, the review highlights novel strategies for the realization of TiO2 phase transformation, thereby contributing to a deeper understanding and advancement in the application of mixed‐phase TiO2 photocatalysts.

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Section: Introductionmentioning

confidence: 99%

Phase Transformation Strategies for the Construction of Heterojunction TiO₂ Photocatalysts

Wang,

Song,

2024

ChemCatChem

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Photoactivity of amorphous and crystalline TiO2 nanotube arrays (TNA) films in gas phase CO2 reduction to methane with simultaneous H2 production

Santos,

Fereidooni,

Márquez

et al. 2024

Environmental Research

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Graphene Nanocomposites in the Treatment of Pancreatic Cancer

Wang

2024

sci adv mater

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The application value of titanium dioxide (TiO2)/graphene nanocomposites in photothermal therapy of pancreatic cancer (PC) was explored. Using scale graphite as raw material, graphene was obtained by Hummer oxidation method and hydrazine hydrate reduction method, and then TiO2/graphene nanocomposites were prepared by ultrasonic heating. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and degraded methyl orange solution were adopted to detect the surface structure, particle size, element morphology, and photocatalytic activity under different composite ratios, different sonication times, and different heating temperatures. Human normal pancreatic ductal epithelial cell line HPDE6-C7 and human metastatic PC cell AsPC-1 were adopted as research models. The cytotoxicity of TiO2/graphene nanocomposites and the killing effect of photothermal therapy based on TiO2/graphene nanocomposites were analyzed by water soluble tetrazolium salt colorimetric assay (WST-1) and methyl thiazolyl tetrazolium salt colorimetric assay (MTT). The results suggested that when the ratio of graphene to TiO2 was 50:1, the ultrasonic time was 100 min, and the heating temperature was 200 °C, TiO2 was better attached to the surface of graphene, the distribution of particles was relatively more uniform, and the concentration of methyl orange was relatively lowest. The XRD pattern showed that the diffraction peak of the doped TiO2/graphene nanocomposite was basically the same as that of the pure TiO2. When the ultrasonic time was 100 min, the diffraction peak intensity in the XRD pattern was the largest. As for AsPC-1 cells, the cell viability was obviously lower than 0.1/1/10/100 μm/mL when the concentration of TiO2/graphene nanocomposites was 500 μm/mL (P <0.05). For HPDE6-C7 cells, when the concentration of TiO2/graphene nanocomposites was 100 and 500 μm/mL, the cell viability was obviously lower than 0.1/1/10 μm/mL (P <0.05), and 500 μm/mL was the lowest. The cell killing rate in group D was clearly higher as against groups A, B, and C (P <0.05). Graphene: The optimal preparation conditions of TiO2/graphene nanocomposites are 50:1, 100 min of ultrasound time, and 200 μC of composite temperature. The photothermal therapy based on TiO2/graphene nanocomposites can effectively kill PC cells, and has a good potential in the field of hyperthermia for pancreatic tumors.

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Comprehensive analysis (aerobic/anaerobic, molecular recognitions, band-position and degradation-mechanism) of undoped and Co-doped anatase-brookite - An experimental/theoretical evaluation of the less-studied TiO2 mixed phase

Cited by 3 publications

References 96 publications

Phase Transformation Strategies for the Construction of Heterojunction TiO₂ Photocatalysts

Phase Transformation Strategies for the Construction of Heterojunction TiO₂ Photocatalysts

Photoactivity of amorphous and crystalline TiO2 nanotube arrays (TNA) films in gas phase CO2 reduction to methane with simultaneous H2 production

Graphene Nanocomposites in the Treatment of Pancreatic Cancer

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Comprehensive analysis (aerobic/anaerobic, molecular recognitions, band-position and degradation-mechanism) of undoped and Co-doped anatase-brookite - An experimental/theoretical evaluation of the less-studied TiO2 mixed phase

Cited by 3 publications

References 96 publications

Phase Transformation Strategies for the Construction of Heterojunction TiO2 Photocatalysts

Phase Transformation Strategies for the Construction of Heterojunction TiO2 Photocatalysts

Photoactivity of amorphous and crystalline TiO2 nanotube arrays (TNA) films in gas phase CO2 reduction to methane with simultaneous H2 production

Graphene Nanocomposites in the Treatment of Pancreatic Cancer

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Product

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About

Phase Transformation Strategies for the Construction of Heterojunction TiO₂ Photocatalysts

Phase Transformation Strategies for the Construction of Heterojunction TiO₂ Photocatalysts