Visible-light-driven TiO2 catalysts doped with low-concentration nitrogen species

Sun, Hongqi; Bai, Yuan; Jin, Wanqin; Xu, Nanping

doi:10.1016/j.solmat.2007.09.003

Cited by 103 publications

(72 citation statements)

References 33 publications

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“…As it shown, typical XPS spectra of the C1s and O1s peak regions were located at 284.98 eV and 531.88 eV respectively. 56 It was found that the C1s peaks with binding energy at 284.18, 284.98, 286.08, 287.26, and 288.98 eV could be suited into a line shapes. 57,58 The function groups of the C1s peak region containing 7.…”

Section: Resultsmentioning

confidence: 99%

H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

Xie

Chen

et al. 2017

RSC Adv.

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Flake graphite (FG) was treated by microwave radiation in hydrogen peroxide solution and used to support stearic acid (SA) to synthesize SA/FG composites for thermal energy storage. Furthermore, the mechanism of the enhanced performance of SA/FG 3 was further revealed by monitoring functional groups of the surface of FG and demonstrated on the atomic-scale. Infrared imaging showed SA/FG 3 possessed superior thermal-regulated properties. Therefore, all these thermal properties indicate SA/FG 3 has potential for application in thermal energy storage systems.

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Section: Resultsmentioning

confidence: 99%

H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

Xie

Chen

et al. 2017

RSC Adv.

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“…Along with nitrogen, titanium (Ti 3+ ) introduced into the TiO 2 due to reduction by in situ hydrogen generation is expected to create an energy state below the conduction band of TiO 2 which further reduces the band gap [45,135,136,[164][165][166][167][168][169][170][171]. This Ti 3+ state in TiO 2 might improve not only light absorption but also charge transport.…”

Section: Hydrazinementioning

confidence: 99%

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

et al. 2017

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Mesoporous titania (mp-TiO 2 ) has drawn tremendous attention for a diverse set of applications due to its high surface area, interfacial structure, and tunable combination of pore size, pore orientation, wall thickness, and pore connectivity. Its pore structure facilitates rapid diffusion of reactants and charge carriers to the photocatalytically active interface of TiO 2 . However, because the large band gap of TiO 2 limits its ability to utilize visible light, non-metal doping has been extensively studied to tune the energy levels of TiO 2 . While first-principles calculations support the efficacy of this approach, it is challenging to efficiently introduce active non-metal dopants into the lattice of TiO 2 . This review surveys recent advances in the preparation of mp-TiO 2 and their doping with non-metal atoms. Different doping strategies and dopant sources are discussed. Further, co-doping with combinations of non-metal dopants are discussed as strategies to reduce the band gap, improve photogenerated charge separation, and enhance visible light absorption. The improvements resulting from each doping strategy are discussed in light of potential changes in mesoporous architecture, dopant composition and chemical state, extent of band gap reduction, and improvement in photocatalytic activities. Finally, potential applications of non-metal-doped mp-TiO 2 are explored in water splitting, CO 2 reduction, and environmental remediation with visible light.

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“…Nano-scale anatase TiO 2 with large band gap energy of 3.2 eV will generate electron-hole pairs when it is exposed to UV radiation under 380 nm due to the photo excitation [1][2][3]. The electron-hole pairs react readily with oxygen and water molecules from the atmosphere to form superoxide and hydroxyl radicals, which inspire photocatalysis of TiO 2 for organic pollutant.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of metal ions and methyl orange by combined selective adsorption and photocatalysis

Zhao¹,

Li²,

Zhang³

et al. 2010

Env Prog and Sustain Energy

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The technology of the selective biosorption and photocatalysis were coupled to synthesize a double functional Chitosan-TiO 2 adsorbent (CTA). CTA can not only degrade organic pollutants but also adsorb metal ions simultaneously. It was interesting that the photocatalysis of CTA for methyl orange (MO) was promoted when MO was coexisted with metal ions. In the presence of Ni 21 , the degradation ratio of MO gradually increased from 78.9 to 94.2% with the increasing of Ni 21 concentration from 50 to 150 mg L 21 ; furthermore with the presence of Ag 1 , the degradation ratio for MO increased from 65.9 to 79.3%. At the same time the existence of MO had no obvious effect on the adsorption ability for metal ions. CTA can be reused more than 10 batches without losing its adsorption and degradation ability. XPS showed the binding energy of Ni 21 increased with Ni 21 initial concentration growing in a particular range. Higher binding energy of Ni will result in stronger OH• formation, so it has a positive influence on the photocatalysis of CTA. Scanning electron microscope (SEM) revealed that silver nanoparticles were found on the surface of CTA and in the solution of MO and Ag 1 , and the silver nanoparticles had promoter action on the degradation for MO. The results showed that the technology of biosorption and photocatalysis were synergistic when they were applied to the system of binary pollutants containing metal ions and MO.

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Visible-light-driven TiO2 catalysts doped with low-concentration nitrogen species

Cited by 103 publications

References 33 publications

H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

Simultaneous removal of metal ions and methyl orange by combined selective adsorption and photocatalysis

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Visible-light-driven TiO2 catalysts doped with low-concentration nitrogen species

Cited by 103 publications

References 33 publications

H2O2-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

H2O2-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

Simultaneous removal of metal ions and methyl orange by combined selective adsorption and photocatalysis

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H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage