Template-free preparation of macro/mesoporous g-C 3 N 4 /TiO 2 heterojunction photocatalysts with enhanced visible light photocatalytic activity

Hao, Ruirui; Wang, Guohong; Tang, Hua; Sun, Lingling; Xu, Chang; Han, Dandan

doi:10.1016/j.apcatb.2016.01.026

Cited by 584 publications

(191 citation statements)

References 63 publications

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“…This denoted that g-C 3 N 4 could efficiently extend absorption of nanocomposities to the visible region and thus enhance the photocatalytic ability in the visible light region. These results are in good agreement with the literature report [18,36]. The absorption edge energies of prepared g-C 3 N 4 /TiO 2 photocatalyst were almost the same as pure g-C 3 N 4.…”

Section: Photocatalysts Characterizationsupporting

confidence: 92%

“…In case of the TiO 2 /g-C 3 N 4 photocatalysts their PL intensities decreased in the order g-C 3 N 4 > TiO 2 /g-C 3 N 4 (1:6) > TiO 2 /g-C 3 N 4 (1:4) > TiO 2 /g-C 3 N 4 (1:2) > TiO 2 which agrees with observations of other authors [13,18,43,44]. This phenomenon can be explained by separation of photoinduced electrons between g-C 3 N 4 and TiO 2 structures via their heterojunctions.…”

Section: Photocatalysts Characterizationsupporting

confidence: 91%

“…This can be achieved by coupling two semiconductors with the different band gaps and suitable band edge positions [15]. TiO 2 /g-C 3 N 4 composites were widely studied for the photocatalytic degradation of pollutants [5,13,[16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: G-c3n4mentioning

confidence: 99%

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Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

Kočí

Reli

Troppová

et al. 2017

Applied Surface Science

103

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Section: Photocatalysts Characterizationsupporting

confidence: 92%

Section: Photocatalysts Characterizationsupporting

confidence: 91%

See 1 more Smart Citation

Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

Kočí

Reli

Troppová

et al. 2017

Applied Surface Science

103

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“…Since the CB levels of TiO 2 is more negative than the potential of O 2 /·O 2 − (−0.046 eV vs. NHE at pH = 7), as a result, the electrons in CB of TiO 2 can be trapped by dissolved oxygen to generate ·O 2 − radical species. And compared with the potential of ·OH/H 2 O (2.27 eV vs. NHE at pH = 7), the remained h + on the VB of g-C 3 N 4 can not react with H 2 O to generate ·OH radicals due to the lower VB level of g-C 3 N 4 (1.63 eV vs. NHE at pH = 7)751. Subsequently, the radical species ·O 2 − and h + can directly degrade organic pollutants.…”

Section: Resultsmentioning

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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“…[178] Alternatively, Hao et al directly synthesized macro/mesoporous g-C 3 N 4 /TiO 2 heterostructures by a facile calcination approach using tetrabutyl titanate and melamine as feedstocks, in which the added content of melamine greatly influenced on their photocatalytic activity. [180] In addition, ternary nanohybrids were further produced in recent years. [179] For the degradation of Rhodamine B, the reaction rate constant was up to 47.8 × 10 −3 min −1 , 7.2 and 3.1 times higher than pure TiO 2 and g-C 3 N 4 , respectively.…”

Section: Hybridization With Nanostructuresmentioning

confidence: 99%

Functionalized Hybridization of 2D Nanomaterials

Guan

Han

2019

Advanced Science

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The discovery of graphene and subsequent verification of its unique properties have aroused great research interest to exploit diversified graphene‐analogous 2D nanomaterials with fascinating physicochemical properties. Through either physical or chemical doping, linkage, adsorption, and hybridization with other functional species into or onto them, more novel/improved properties are readily created to extend/expand their functionalities and further achieve great performance. Here, various functionalized hybridizations by using different types of 2D nanomaterials are overviewed systematically with emphasis on their interaction formats (e.g., in‐plane or inter plane), synergistic properties, and enhanced applications. As the most intensely investigated 2D materials in the post‐graphene era, transition metal dichalcogenide nanosheets are comprehensively investigated through their element doping, physical/chemical functionalization, and nanohybridization. Meanwhile, representative hybrids with more types of nanosheets are also presented to understand their unique surface structures and address the special requirements for better applications. More excitingly, the van der Waals heterostructures of diverse 2D materials are specifically summarized to add more functionality or flexibility into 2D material systems. Finally, the current research status and faced challenges are discussed properly and several perspectives are elaborately given to accelerate the rational fabrication of varied and talented 2D hybrids.

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Template-free preparation of macro/mesoporous g-C 3 N 4 /TiO 2 heterojunction photocatalysts with enhanced visible light photocatalytic activity

Cited by 584 publications

References 63 publications

Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

Photocatalytic decomposition of N2O over TiO2/g-C3N4 photocatalysts heterojunction

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

Functionalized Hybridization of 2D Nanomaterials

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