Nanotube-confinement induced size-controllable g-C3N4 quantum dots modified single-crystalline TiO2 nanotube arrays for stable synergetic photoelectrocatalysis

Li, Guisheng; Lian, Zichao; Wang, Qianqian; Zhang, Dieqing; Li, Hexing

doi:10.1016/j.nanoen.2015.10.011

Cited by 335 publications

(152 citation statements)

References 45 publications

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“…Therefore, various methods have been recently employed to overcome the intrinsic limitations of [36,37]. This material has attracted considerable interest due to its unique physicochemical property and electronic band structure [38], which has been potentially applied in fields that are related to solar energy conversion [39,40], environmental remediation [41,42], bioimaging [43], and material science [44,45].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Wang

Huang

et al. 2016

Applied Catalysis B: Environmental

215

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2Graphical Abstract 3 Highlights 1. Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunctions were fabricated via a self-sacrificial route.2. The heterojunctions exhibit superior photocatalytic NO removal efficiency.3. Structural evolution and synergistic catalytic mechanisms were investigated.4. This study provides a new route for C 3 N 4 -based carbonate composites fabrication. 4 AbstractLayer-structured Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction photocatalysts were successfully prepared via one-pot hydrothermal method for the first time, in which graphitic carbon nitride (g-C 3 N 4 ) served as the self-sacrificial reagent to supply carbonate anions simultaneously. Our results showed that the in situ fabricated Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction exhibited superior visible-light-driven photocatalytic activity for NO photocatalytic oxidation, which can be ascribed to the morphology and structure modulation during the sacrificial synthesis processes. Heterojunctions formation pathways underlying temperature-and time-dependent structure evolution were discussed in detail. The sample fabricated at 160 °C for 12 h (BOC-CN-160) showed high stability and durability, and the highest NO removal rate which is up to 34.8% under visible light irradiation. Results from photocurrent tests and electrochemical impedance spectroscopy (EIS) demonstrated that the BOC-CN-160 sample presents much more effective interface charge separation efficiency, which can contribute to its remarkably improved photocatalytic performance. Reactive radicals during the photocatalysis processes were identified by electron spin resonance (ESR) study. Combined with the quantification of reaction intermediates, the photocatalytic degradation mechanism of NO over Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction photocatalyst was proposed. The novel approach developed in this study may be further extended to synthesize a series of novel and highly efficient g-C 3 N 4 -based carbonate heterojunction photocatalysts for visible light-harvesting and energy conversion applications. 5

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Section: Introductionmentioning

confidence: 99%

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Wang

Huang

et al. 2016

Applied Catalysis B: Environmental

215

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“…There have been many studies on hybrids of g-C 3 N 4 with TiO 2 . Recent studies on these composites have shown improved photocatalytic performance in dye degradation and H 2 evolution under visible light irradiation212223.…”

mentioning

confidence: 99%

Black TiO2 nanobelts/g-C3N4 nanosheets Laminated Heterojunctions with Efficient Visible-Light-Driven Photocatalytic Performance

Shen

Xing

Zou

et al. 2017

Sci Rep

221

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Black TiO2 nanobelts/g-C3N4 nanosheets laminated heterojunctions (b-TiO2/g-C3N4) as visible-light-driven photocatalysts are fabricated through a simple hydrothermal-calcination process and an in-situ solid-state chemical reduction approach, followed by the mild thermal treatment (350 °C) in argon atmosphere. The prepared samples are evidently investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption, and UV-visible diffuse reflectance spectroscopy, respectively. The results show that special laminated heterojunctions are formed between black TiO2 nanobelts and g-C3N4 nanosheets, which favor the separation of photogenerated electron-hole pairs. Furthermore, the presence of Ti3+ and g-C3N4 greatly enhance the absorption of visible light. The resultant b-TiO2/g-C3N4 materials exhibit higher photocatalytic activity than that of g-C3N4, TiO2, b-TiO2 and TiO2/g-C3N4 for degradation of methyl orange (95%) and hydrogen evolution (555.8 μmol h−1 g−1) under visible light irradiation. The apparent reaction rate constant (k) of b-TiO2/g-C3N4 is ~9 times higher than that of pristine TiO2. Therefore, the high-efficient laminated heterojunction composites will have potential applications in fields of environment and energy.

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“…In another case, the enhanced photocatalytic activity for H 2 generation is probably attributed to the fast interfacial transfer of photogenerated charge carriers between Co-2TPABTz and Ag NPs and subsequent effective charge separation [29]. The photo-induced charge transfer was confirmed by PL spectra of the semiconductor composites, as presented in Fig.…”

Section: Optical Propertymentioning

confidence: 73%

“…Photoelectrochemical (PEC) and electrochemical impedance spectra (EIS) measurements were carried out by electrochemical analyzer (CHI660C Instruments, Shanghai, China) with a conventional three-electrode system [29,30]. Prior to these experiments, the film electrodes of Ag NPs loaded Co-2TPABTz were prepared at first.…”

Section: Instrumentsmentioning

confidence: 99%

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Silver nanoparticles-sensitized cobalt complex for highly-efficient photocatalytic activity

Huo

Zeng

2016

Applied Catalysis B: Environmental

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Nanotube-confinement induced size-controllable g-C3N4 quantum dots modified single-crystalline TiO2 nanotube arrays for stable synergetic photoelectrocatalysis

Cited by 335 publications

References 45 publications

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Black TiO2 nanobelts/g-C3N4 nanosheets Laminated Heterojunctions with Efficient Visible-Light-Driven Photocatalytic Performance

Silver nanoparticles-sensitized cobalt complex for highly-efficient photocatalytic activity

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