Untitled

Kim, Sun–Jae; Lee, E.G.; Park, S.D.; Jeon, Cheolho; Cho, Y.H.; Rhee, Chang Kyu; Kim, W.W.

doi:10.1023/a:1011264320138

Cited by 61 publications

(19 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these studies [15][16][17] brookite is described as a better photocatalyst compared to anatase and rutile because electrons are trapped at moderate depths, so that both electrons and holes are still accessible for reduction and oxidation reactions. Generally, a mixture of these modifications gives higher photocatalytic activities due to synergistic effects like interfacial electron transfer [12,[18][19][20][21][22]. With a mixture of anatase and rutile the recombination of photo-generated electrons and holes is reduced, and the absorption of light is increased by rutile [12,18,19].…”

Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

View full text Add to dashboard Cite

Removing pollutants from water by using the photocatalyst TiO 2 is a highly-promising method. A large amount of work has been done to increase the activity of TiO 2 , whereas the main two findings are increasing the surface area and applying mixed phase modifications (anatase, brookite, and rutile). Here, we present a method to directly synthesize non-agglomerated TiO 2 nanoparticles with different crystal phase ratios via low temperature dissolution-precipitation (LTDRP) on a porous microfiltration membrane (polyethersulfone). The amount of hydrochloric acid and the temperature was varied between 0.1-1 M and 25-130 • C, respectively, while the concentration of titanium precursor (titanium(IV) isopropoxide) was kept unchanged. The TiO 2 nanoparticles and the membrane were thoroughly characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), measuring the water contact angle and permeation flux, and examining the degradation of methylene blue. The mixed phase anatase/brookite with a main component being anatase exhibited the highest photocatalytic activity in removing methylene blue. Higher synthesis temperature induces enhanced crystallinity and, subsequently, the degradation rate of methylene blue was improved. Additionally, the photocatalytic activity remains high and unchanged for up to nine repeated cycles, i.e., full recovery of the photocatalytic properties is sustained.

show abstract

Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

View full text Add to dashboard Cite

show abstract

“…1 It could be predicted that the superior photoreductive properties of the HPPLT powder would be ascribed to its chestnut bur shape with acicular primary particles. Accordingly, the detailed mechanism of the photocatalytic reaction of the rutile powder, including the reason behind its lower photocatalytic efficiency, has not been explained appropriately yet.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic properties of rutile TiO₂ acicular particles in aqueous 4-chlorophenol solution

Kim

Lee

et al. 2003

J. Mater. Res.

Self Cite

View full text Add to dashboard Cite

The photocatalytic properties of TiO 2 rutile powder with acicular primary particles were characterized using the photocatalytic reaction in aqueous 4-chlorophenol (4CP) solution and compared to those of TiO 2 anatase with almost the same surface area of approximately 200 m 2 /g. The characteristics of commercial P-25 TiO 2 powders with the surface area of approximately 55 m 2 /g were also compared to rutile and anatase powders. The rutile phase powders surpassed both anatase and P-25 ones in decomposition rate for 4CP. The excellent photo-oxidative ability of the powder was dependent on the specific powder-preparation method, which led to a direct crystallization in aqueous solution, regardless of the crystalline structures of the powders.

show abstract

“…− with H + and dissolved O 2 in the aqueous solution, and the holes can oxidize OH − to produce hydroxyl radicals •OH and, thus, achieve the effect of degrading pollutants [41][42][43][44].…”

Section: Reaction Mechanismmentioning

confidence: 99%

Recent Advances and Applications of Semiconductor Photocatalytic Technology

et al. 2019

View full text Add to dashboard Cite

Along with the development of industry and the improvement of people’s living standards, peoples’ demand on resources has greatly increased, causing energy crises and environmental pollution. In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally-friendly, and sustainable technology, and it has become a hot research topic. However, current photocatalytic technology cannot meet industrial requirements. The biggest challenge in the industrialization of photocatalyst technology is the development of an ideal photocatalyst, which should possess four features, including a high photocatalytic efficiency, a large specific surface area, a full utilization of sunlight, and recyclability. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts and the methods for improving photocatalytic performance; we also further discuss the potential industrial usage of photocatalytic technology. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.

show abstract

Untitled

Cited by 61 publications

References 21 publications

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Photocatalytic properties of rutile TiO₂ acicular particles in aqueous 4-chlorophenol solution

Recent Advances and Applications of Semiconductor Photocatalytic Technology

Contact Info

Product

Resources

About

Untitled

Cited by 61 publications

References 21 publications

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Photocatalytic properties of rutile TiO2 acicular particles in aqueous 4-chlorophenol solution

Recent Advances and Applications of Semiconductor Photocatalytic Technology

Contact Info

Product

Resources

About

Photocatalytic properties of rutile TiO₂ acicular particles in aqueous 4-chlorophenol solution