State‐of‐the‐Art Progress in Diverse Heterostructured Photocatalysts toward Promoting Photocatalytic Performance

Li, H.J.; Zhou, Yong; Tu, Wenguang; Ye, Jinhua; Zou, Zhigang

doi:10.1002/adfm.201401636

Cited by 727 publications

(356 citation statements)

References 205 publications

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“…In type II heterostructure band alignment, the position of CB and valence band (VB) of g-C 3 N 4 is both higher than that of LTO. The band bending at the interface of type II heterojunction due to the difference of chemical potential between g-C 3 N 4 and LTO induces a built-in field, which promotes the photoexcited electrons to facilely move from CB of g-C 3 N 4 to LTO, and holes move from VB of LTO to g-C 3 N 4 [42,43]. CB of the LTO nanosheets declined 0.09 eV after N-doping.…”

Section: Band Alignment Of G-c 3 N 4 /Nltomentioning

confidence: 99%

Graphitic-C3N4 hybridized N-doped La2Ti2O7 two-dimensional layered composites as efficient visible-light-driven photocatalyst

Cai

Zhang

Fujitsuka

et al. 2017

Applied Catalysis B: Environmental

109

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a b s t r a c tPerovskite-type La 2 Ti 2 O 7 (LTO), having a layered structure and the separated H 2 and O 2 evolution sites, is attractive as an efficient photocatalyst. However, the photocatalytic activity is often limited by the poor electron mobility. This problem can be conquered by hybridization with materials having efficient properties for the visible light absorption and charge carrier transport. Here, we report a two-dimensional (2D) layered composite hybridized by approximately 2 nm thick graphitic C 3 N 4 nanosheets (g-C 3 N 4 ) and 7 nm thick nitrogen doped LTO nanosheets (NLTO) (g-C 3 N 4 /NLTO), in which g-C 3 N 4 and NLTO act as hole receptor and electron conductor, respectively. g-C 3 N 4 /NLTO exhibited high photocatalytic activities for H 2 production via water splitting and dye degradation under the UV and visible light irradiation, due to the interfacial charge transfer between g-C 3 N 4 and NLTO. The electrochemical measurement showed the type II band alignment with favorable charge transfer from g-C 3 N 4 to NLTO. The 2D architecture with a maximized interfacial area allows efficient charge separation with a short interfacial distance. This efficient interfacial charge transfer is further elucidated from monitoring of charge separation and trapping processes using the femtosecond time-resolved diffused reflectance (TDR) measurement.

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Section: Band Alignment Of G-c 3 N 4 /Nltomentioning

confidence: 99%

Graphitic-C3N4 hybridized N-doped La2Ti2O7 two-dimensional layered composites as efficient visible-light-driven photocatalyst

Cai

Zhang

Fujitsuka

et al. 2017

Applied Catalysis B: Environmental

109

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“…51,56 Based on the molecular structure of MIL: As highlighted in Figure 7, a typical type-I straddling heterojunction between CNNSs and MIL could be formed in the nanocomposites. 40 The mechanism of organic molecules (e.g. Rhodamine B)…”

Section: -59mentioning

confidence: 99%

Carbon nitride nanosheet/metal–organic framework nanocomposites with synergistic photocatalytic activities

Hong

Chen

Bedoya

et al. 2016

Catal. Sci. Technol.

124

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Heterogeneous photocatalysis plays a key role in the implementation of novel sustainable technologies, e.g. CO 2 conversion into fuel, H 2 production from water or organics degradation. The progress of photocatalysis relies on the development of tuneable photocatalysts and particularly the ability to build nanocomposites exhibiting synergistic properties with reduced electron-hole recombination rates. We report for the first time the in situ synthesis of nanocomposites of carbon nitride nanosheets (CNNSs) and metal-organic frameworks (MOFs) for application as photocatalysts. This approach leads to the 'nano-scale mixing' of the components, thereby their physical mixture. The nanocomposites retain the high specific surface area and strong visible light absorbance of MIL-100(Fe). The intimate contact between the CNNSs and the MOF particles is found to promote the electron-hole separation significantly due to the formation of a heterojunction. Hence, more efficient photocatalytic dye degradation is achieved over the composites than the physical mixture.

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“…Recently, exploring semiconductor/semiconductor photocatalytic heterojunctions that mainly contain type-I/II/III heterojunctions, p/n-n heterojunctions, Z-scheme system, and homojunction for photocatalytic performance improvement has been paid more and more attention [18,19]. In contrast to single semiconductors, heterostructure composites not only effectively restrain the recombination of photoinduced e − -h + pairs, but also markedly endow nanohybrids with enhanced properties or unique features through their synergistic catalytic effects [20].…”

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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State‐of‐the‐Art Progress in Diverse Heterostructured Photocatalysts toward Promoting Photocatalytic Performance

Cited by 727 publications

References 205 publications

Graphitic-C3N4 hybridized N-doped La2Ti2O7 two-dimensional layered composites as efficient visible-light-driven photocatalyst

Graphitic-C3N4 hybridized N-doped La2Ti2O7 two-dimensional layered composites as efficient visible-light-driven photocatalyst

Carbon nitride nanosheet/metal–organic framework nanocomposites with synergistic photocatalytic activities

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

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