Construction of stable Ta 3 N 5 /g-C 3 N 4 metal/non-metal nitride hybrids with enhanced visible-light photocatalysis

Jiang, Yinhua; Li, Peipei; Chen, Ye Cheng; Zhou, Zhengzhong; Yang, Hanxi; Hong, Yuanzhi; Li, Fan; Ni, Liang; Yan, Yongsheng; Gregory, Duncan H.

doi:10.1016/j.apsusc.2016.04.094

Cited by 76 publications

(20 citation statements)

References 62 publications

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“…Instead, the type II g‐C 3 N 4 ‐based heterojunction illustrated in Figure b can be constructed more easily. Various metal oxides (TiO 2 , ZnO, WO 3 , CeO 2 , In 2 O 3 , MoO 3 , SnO 2 , Fe 2 O 3 , V 2 O 5 ), metal sulfides (CdS, ZnS, MoS 2 , Zn 1− x Cd x S, ZnIn 2 S 4 ), halides (BiOI, BiOCl, BiOBr, AgI, AgBr), modified g‐C 3 N 4 and other semiconductor (such as Bi 2 WO 6 , BiVO 4 , BiPO 4 , Ag 3 PO 4 , Ta 3 N 5 , SiC) have been used for constructing g‐C 3 N 4 ‐based conventional type II heterojunction systems ( Table 1 ).…”

Section: Categories Of G‐c3n4‐based Heterostructured Photocatalystsmentioning

confidence: 99%

g‐C₃N₄‐Based Heterostructured Photocatalysts

Wang

Jiang

et al. 2017

Advanced Energy Materials

2,170

991

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Thereafter, the photocatalytic degrada tion of polychlorobiphenyls [2] and photo electrocatalytic reduction of CO 2 into hydrocarbon compounds [3] in aqueous semiconductor suspensions greatly broad ened the applications of photocatalysis. Although the photocatalytic technology has got worldwide attention for its eco nomic, clean, safe, and renewable charac teristics, the photocatalytic performance of currently known photocatalysts is still far from commercial applications, especially in solartofuel conversion. [4][5][6][7][8][9][10][11] Generally, the photocatalytic reactions can be divided into three basic processes. First, the semiconductor photocatalysts absorb effective photons whose energy (h v ) is equal to or above their bandgap (E g ), resulting in the generation of electronhole pairs. Second, the photogenerated charge carriers separate and transfer to the surface of photocatalysts. Third, the photogenerated electrons and holes partic ipate in reactions of substances adsorbed on the surface of the photocatalysts. [12,13] Thus, the improvements of the three aforementioned processes play impor tant roles in enhancing the photocatalytic performance. Light absorption is the first essential step of photocatalysis process. The traditional anatase phase TiO 2 photocatalyst is active only under UV light with wavelength below 387 nm due to its wide bandgap (3.2 eV). However, solar energy is mainly concentrated in the visible light region, and UV light accounts for less than 4% of the solar spectrum. [7] In order to achieve maximum utilization efficiency of solar energy, the exploration of visiblelightresponsive photo catalysts is an urgent task. Graphitic carbon nitride (gC 3 N 4 ) as a promising visiblelightresponsive photocatalyst has received worldwide attention due to its fascinating merits, such as moderate bandgap (≈2.7 eV), proper electronic band structure, nontoxicity, low cost, good stability, and easy preparation. [14][15][16][17][18] Since the first report on photocatalytic H 2 evolution over gC 3 N 4 by Wang et al. in 2009, [19] research endeavors toward improving the photocatalytic performance of gC 3 N 4 based photocatalysts have formed a forefront of photocatalysis research. [20][21][22][23][24][25] Bulk gC 3 N 4 powder can be prepared by the thermal poly condensation of lowcost nitrogencontaining organic pre cursors, e.g., urea, thiourea, melamine, cyanamide, dicyan diamide, guanidine hydrochloride, and so on. [26][27][28][29][30][31][32] The pure bulk gC 3 N 4 prepared by this method suffers from several shortcomings, including low specific surface area, insufficient visible light utilization, and, particularly, rapid recombination Photocatalysis is considered as one of the promising routes to solve the energy and environmental crises by utilizing solar energy. Graphitic carbon nitride (g-C 3 N 4 ) has attracted worldwide attention due to its visible-light activity, facile synthesis from low-cost materials, chemical stability, and unique layered structure. However, the pure g-C 3 N 4 photocatalys...

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Section: Categories Of G‐c3n4‐based Heterostructured Photocatalystsmentioning

confidence: 99%

g‐C₃N₄‐Based Heterostructured Photocatalysts

Wang

Jiang

et al. 2017

Advanced Energy Materials

2,170

991

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“…Recently, g‐C 3 N 4 with layered structure has gained great attention . Two‐dimensional (2D) g‐C 3 N 4 sheets consist of carbon and nitrogen atoms linked by covalent bond, and stacked with the assistance of weak van der Waals interaction between the layers, endowing it with high thermal and chemical stability . More importantly, thanks to a suitable bandgap of 2.7 eV, g‐C 3 N 4 is visible light responsive, and its negative conduction band (CB) potential enables water/proton reduction with a strong driving force .…”

Section: Introductionmentioning

confidence: 99%

Constructing 2D/2D Fe₂O₃/g‐C₃N₄ Direct Z‐Scheme Photocatalysts with Enhanced H₂ Generation Performance

et al. 2018

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Sunlight‐driven photocatalytic water splitting to generate hydrogen (H2) is a promising approach for utilizing solar energy. Herein, direct Z‐scheme Fe2O3/g‐C3N4 photocatalysts are rationally fabricated for H2 evolution under visible light. The graphitic carbon nitride (g‐C3N4) nanosheets obtained by solvent exfoliation of bulk g‐C3N4 display modest photocatalytic activity. Strikingly, its photocatalytic performance can be greatly improved by electrostatically assembling with hematite α‐Fe2O3 nanoplates. With platinum (Pt) as co‐catalyst and triethanolamine (TEOA) as hole scavenger, the H2 generation rate of optimized Fe2O3/g‐C3N4 composite with Fe2O3 weight percentage of 10% is about 13‐fold that of g‐C3N4. Based on the enhanced photocatalytic performance and slower time‐resolved photoluminescence decay, Z‐scheme charge transfer process is accepted for running this photocatalytic system, which is further evidenced by selective photo‐deposition of Pt nanoparticles on the g‐C3N4 surface. This rationally synthesized Fe2O3/g‐C3N4 composite is expected to have great potentials in solar energy conversation.

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“…[5][6][7] Constructing heterojunction has been proved to be a convenient and effective method driving efficient carrier separation in bulk phase, fast transportation, and fast reaction at the semiconductor/liquid interfaces for Ta-based photocatalysts. [6][7][8][9][10][11][12] To date, many kinds of effective heterojunctions have been developed, such as semiconductor/semiconductor heterojunctions (p-n junction Ag 3 PO 4 /Ta 3 N 5 and Ta 3 N 5 /BaTaO 2 N, n-n junction CoO x /Ta 3 N 5 , Z-scheme junction TaON/Bi 2 O 3 and Ta 3 N 5 /Bi 2 O 3 ), [6][7][8][9] cocatalyst/semiconductor heterojunction (Ru/ TaON), 10 and non-metal/semiconductor heterojunction (Ta 3 N 5 / g-C 3 N 4 ). 11 Previously, we constructed Rh/TaON/Ta 2 O 5 heterojunctions by coupling Rh/TaON Schottky junction and n-n TaON/Ta 2 O 5 mutant heterojunction to synergetically enhance photocatalytic H 2 -evolution activity.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8][9][10][11][12] To date, many kinds of effective heterojunctions have been developed, such as semiconductor/semiconductor heterojunctions (p-n junction Ag 3 PO 4 /Ta 3 N 5 and Ta 3 N 5 /BaTaO 2 N, n-n junction CoO x /Ta 3 N 5 , Z-scheme junction TaON/Bi 2 O 3 and Ta 3 N 5 /Bi 2 O 3 ), [6][7][8][9] cocatalyst/semiconductor heterojunction (Ru/ TaON), 10 and non-metal/semiconductor heterojunction (Ta 3 N 5 / g-C 3 N 4 ). 11 Previously, we constructed Rh/TaON/Ta 2 O 5 heterojunctions by coupling Rh/TaON Schottky junction and n-n TaON/Ta 2 O 5 mutant heterojunction to synergetically enhance photocatalytic H 2 -evolution activity. 12 However, most previous research for Ta 3 N 5 -based photocatalysts focused on the charge carrier separation and utilization in two or three component heterojunctions, and little attention has been paid on designing multiple core-shell heterostructures.…”

Section: Introductionmentioning

confidence: 99%

Constructing Rh–Rh³⁺ modified Ta₂O₅@TaON@Ta₃N₅ with special double n–n mutant heterojunctions for enhanced photocatalytic H₂-evolution

et al. 2020

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Construction of stable Ta 3 N 5 /g-C 3 N 4 metal/non-metal nitride hybrids with enhanced visible-light photocatalysis

Cited by 76 publications

References 62 publications

g‐C₃N₄‐Based Heterostructured Photocatalysts

g‐C₃N₄‐Based Heterostructured Photocatalysts

Constructing 2D/2D Fe₂O₃/g‐C₃N₄ Direct Z‐Scheme Photocatalysts with Enhanced H₂ Generation Performance

Constructing Rh–Rh³⁺ modified Ta₂O₅@TaON@Ta₃N₅ with special double n–n mutant heterojunctions for enhanced photocatalytic H₂-evolution

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Construction of stable Ta 3 N 5 /g-C 3 N 4 metal/non-metal nitride hybrids with enhanced visible-light photocatalysis

Cited by 76 publications

References 62 publications

g‐C3N4‐Based Heterostructured Photocatalysts

g‐C3N4‐Based Heterostructured Photocatalysts

Constructing 2D/2D Fe2O3/g‐C3N4 Direct Z‐Scheme Photocatalysts with Enhanced H2 Generation Performance

Constructing Rh–Rh3+ modified Ta2O5@TaON@Ta3N5 with special double n–n mutant heterojunctions for enhanced photocatalytic H2-evolution

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Product

Resources

About

g‐C₃N₄‐Based Heterostructured Photocatalysts

g‐C₃N₄‐Based Heterostructured Photocatalysts

Constructing 2D/2D Fe₂O₃/g‐C₃N₄ Direct Z‐Scheme Photocatalysts with Enhanced H₂ Generation Performance

Constructing Rh–Rh³⁺ modified Ta₂O₅@TaON@Ta₃N₅ with special double n–n mutant heterojunctions for enhanced photocatalytic H₂-evolution