Preparations and photocatalytic hydrogen evolution of N-doped TiO2 from urea and titanium tetrachloride

Yuan, Jian; Chen, Mingxia; Shi, Jianwei; Shangguan, Wenfeng

doi:10.1016/j.ijhydene.2005.11.016

Cited by 233 publications

(139 citation statements)

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“…106 Yuan et al found that in nitrogen (N)-doped TiO 2 samples the N was presented in the state of both molecularly chemisorbed N 2 and substituted N; while both of them contributed to the response to visible light, the substituted N was responsible for the hydrogen evolution under visible light. 110 S dopant induced a similar bandgap narrowing as nitrogen: 89 the mixing of the sulfur 3p states with the valence band was found to contribute to the increased width of the valence band, leading to the narrowing of the bandgap, 91,93 the strong absorption in the region from 400 to 600 nm. 99 In Asahi's study, C dopant introduced deep states in the gap.…”

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confidence: 87%

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Nanomaterials for renewable energy production and storage

et al. 2012

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Over the past decades, there have been many projections on the future depletion of the fossil fuel reserves on earth as well as the rapid increase in green-house gas emissions. There is clearly an urgent need for the development of renewable energy technologies. On a different frontier, growth and manipulation of materials on the nanometer scale have progressed at a fast pace. Selected recent and significant advances in the development of nanomaterials for renewable energy applications are reviewed here, and special emphases are given to the studies of solar-driven photocatalytic hydrogen production, electricity generation with dye-sensitized solar cells, solidstate hydrogen storage, and electric energy storage with lithium ion rechargeable batteries.

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confidence: 87%

“…89 In N-doped TiO 2 nanomaterials, the bandgap absorption onset shifted 600 nm from 380 nm, 92,110 with primary optical absorption increase between 400 and 500 nm, compared to the 500 nm absorption due to the oxygen defects in TiO 2 .…”

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confidence: 99%

Nanomaterials for renewable energy production and storage

et al. 2012

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“…Among of the semiconductor, titanium dioxide (TiO 2 ) is the most popular and widely used by researchers due to its chemical stability, low cost, atoxic, capability for the reusable and its high photocatalytic activity [1][2][3][4]. This material consist a wide band gaps between 3.0 eV to 3.2 eV which require the UV light irradiation which means that only (4-6%) of sunlight has the required energy to activate the photocatalyst [5]. Thus, the doping techniques have been explored to enhance the photocatalysis toward visible light.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nitrogen Co-Doped P25: Parameter Study on Photodegradation of Reactive Red 4

Jalil

Nawawi

Ishak

et al. 2016

MATEC Web of Conferences

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Abstract. Photocatalytic degradation rate of reactive red 4 (RR4) using carbon coated nitrogen doped TiO2 (C N co-doped TiO2) in photocatalysis process is main goal on this research. The main operating the parameters such as effect of initial dye concentration, catalyst loading, aeration flow rate and initial pH on degradation of RR4 under 45 W fluorescent lamp was investigated. photocatalytic activity of RR4 dye decreased with increasing RR4 dye concentration. The optimum loading is around 0.04 g and optimum aeration rate is about 25 mL min -1 of C N co-doped TiO2. Effect of pH was conducted based on the optimum loading and conclude that the photocatalytic degradation of RR4 became faster at pH 2 -7. For the future work, the modification of doping with others element like non-metal or metal with C N co-doped TiO2 can be enhanced toward the higher efficieny of photodegradation under visible light. Moreover, the immobilized technique can be used in future to overcome the difficulty of filtration on suspension.

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“…Moreover, diatomite has outstanding merits as catalyst support for the removal of pollutants [15][16][17][18], from point of views of inert characteristics, substantial resources, practical use and environmental requirements [19]. The huge amount of silicon hydroxyl groups, acid sites and hydrogen bonds on the surface of amorphous SiO 2 can be considered as adsorption sites for pollutants [20][21][22]. Kou-Jong Hsien et al [13] used three kinds of commercial anatase TiO 2 as photoactive particles supported in diatomite to study the photocatalytic efficiency of the bisphenol-A remediation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and activity of an immobilized photocatalyst: Natural porous diatomite supported titania nanoparticles

Wang

Godoi

Sun

et al. 2015

Journal of Colloid and Interface Science

120

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Diatomite, a porous non-metal mineral, was used as support to prepare TiO 2 /diatomite composites by a modified sol-gel method. The as-prepared composites were calcined at temperatures ranging from 450 to 950 o C. The characterization tests included X-ray powder diffraction (XRD), scanning electron microscopy (SEM) with an energy-dispersive X-ray spectrometer (EDS), High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption/desorption measurements. The XRD analysis indicated that the binary mixtures of anatase and rutile exist in the composites. The morphology analysis confirmed the TiO 2 particles were uniformly immobilized on the surface of diatom with a strong interfacial anchoring strength, which leads to few drain of photocatalytic components during practical applications. In further XPS studies of hybrid catalyst, we found the evidence of the presence of Ti-O-Si bond and increased percentage of surface hydroxyl. In addition, the adsorption capacity and photocatalytic activity of synthesized TiO 2 /diatomite composites were evaluated by studying the degradation kinetics of aqueous Rhodamine B under UV-light irradiation.The photocatalytic degradation was found to follow pseudo-first order kinetics according to the Langmuir-Hinshelwood model. The preferable removal efficiency was observed in composites by 750 o C calcination, which is attributed to a relatively 2 appropriate anatase/rutile mixing ratio of 90/10.

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Preparations and photocatalytic hydrogen evolution of N-doped TiO2 from urea and titanium tetrachloride

Cited by 233 publications

References 20 publications

Nanomaterials for renewable energy production and storage

Nanomaterials for renewable energy production and storage

Carbon Nitrogen Co-Doped P25: Parameter Study on Photodegradation of Reactive Red 4

Synthesis, characterization and activity of an immobilized photocatalyst: Natural porous diatomite supported titania nanoparticles

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