One-pot synthesis of g-C3N4/V2O5 composites for visible light-driven photocatalytic activity

Liu, Qinqin; Fan, Chunya; Tang, Hua; Sun, Xiujuan; Yang, Juan; Cheng, Xiaonong

doi:10.1016/j.apsusc.2015.09.010

Cited by 94 publications

(24 citation statements)

References 41 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

2,100

937

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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

2,100

937

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“…Furthermore, the presence of reduced graphene oxide in the composite structure of Cu 2 O/g-C 3 N 4 facilitated the charge separation and efficiency towards the photocatalytic reaction [30]. In addition to the efficient photocatalytic properties of g-C 3 N 4 heterojunctions with Cu 2 O, its composite with V 2 O 5 has been reported for enhanced photodegradation of rhodamine B under visible light [25].…”

Section: Photocatalytic Efficiencymentioning

confidence: 99%

“…Another semiconductor of Cu(I) vanadate with an increased ratio of copper, Cu 3 VO 4 is synthesized at around 550 °C, making it suitable for fabrication of heterojunction with g-C 3 N 4 [23,24]. V 2 O 5 is also hybridized with g-C 3 N 4 for interesting visible light driven photocatalytic properties [25]. However, no reports exist on the g-C 3 N 4 modifications with Cu(I)-based multimetal oxides with vanadium (CuVO 3 , and Cu 3 VO 4 ).…”

Section: Introductionmentioning

confidence: 99%

Solid-state Synthesis of Composite Structures of Various Cu(I)-based Oxides with g-C3 N4 for Harvesting Solar Energy

2018

AMSE

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Development of novel materials for an efficient harvesting of solar energy towards applications in environment and energy sectors is an important area of research. A metal-free polymeric material, g-C3 N4 is modified with three Cu(I)- based oxides namely Cu2 O, CuVO3 , and Cu3 VO4 to extend the absorption of the solar spectrum. The composite structures are synthesized by a facile one-step solid-state reaction under inter atmosphere and atmospheric pressure. The amounts of loadings of Cu(I)-based oxides onto g-C3 N4 is varied from 2 wt.% to 10 wt.%. Powder XRD patterns showed that the graphitic structure of carbon nitride is maintained upon the construction of hybrid structures with Cu(I) oxides. SEM images show the textural transformation of the bulk structure of g-C3 N4 into nanosheets upon thermal retreatment. FT-IR spectra further confirmed the stability of g-C3 N4 observed in the XRD patterns. In comparison with the pristine g-C3 N4 , the DR-UV-Vis spectra of the modified solid powders demonstrated a clear red shift in the absorption towards higher wavelength and their better prospects in harvesting solar energy. Tauc plots derived from the DR-UV-Vis spectra showed a narrowing of the direct-allowed band gap upon modifications with Cu(I)-based oxides. The composites showed moderate activity in photocatalytic degradation of rhodamine B under irradiation from a solar simulator

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“…Ideally, a direct way to utilize the visible light is the use of a narrow bandgap photocatalyst. V 2 O 5 , with a bandgap of only 2.3 eV, has recently been widely investigated for photodegradation of organic pollutants . However, the narrow bandgap of V 2 O 5 also results in rapid electron‐hole pair recombination, thus leading to less than expected photodegradation performance .…”

Section: Introductionmentioning

confidence: 99%

“…V 2 O 5 , with a bandgap of only 2.3 eV, has recently been widely investigated for photodegradation of organic pollutants. [27][28][29][30][31][32][33] However, the narrow bandgap of V 2 O 5 also results in rapid electron-hole pair recombination, thus leading to less than expected photodegradation performance. 34 This issue is being investigated by either doping V 2 O 5 with a metal ion or coupling V 2 O 5 with a semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Wide‐bandgap HfO₂‐V₂O₅ nanowires heterostructure for visible light‐driven photocatalytic degradation

Sari

Ting

2019

J Am Ceram Soc

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A novel HfO2/V2O5 nanocomposite has been fabricated for use as photocatalyst. HfO2 nanoparticles (NPs) were deposited on V2O5 using a precipitation method. Both commercial V2O5 particles and microwave‐assisted hydrothermal (MAH)‐synthesized V2O5 nanowires (NWs) were used. We demonstrate that the HfO2/V2O5 nanocomposite exhibits better photodegradation efficiency than the V2O5. The photodegradation reaction constant of the HfO2/V2O5 nanocomposite is more than 66% higher than that of the V2O5. The wide‐bandgap, transparent HfO2 effectively reduces the electron‐hole recombination by proving defect levels to quench the recombination. A plausible band structure is proposed to support the existence of these defect levels.

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One-pot synthesis of g-C3N4/V2O5 composites for visible light-driven photocatalytic activity

Cited by 94 publications

References 41 publications

g‐C₃N₄‐Based Heterostructured Photocatalysts

g‐C₃N₄‐Based Heterostructured Photocatalysts

Solid-state Synthesis of Composite Structures of Various Cu(I)-based Oxides with g-C3 N4 for Harvesting Solar Energy

Wide‐bandgap HfO₂‐V₂O₅ nanowires heterostructure for visible light‐driven photocatalytic degradation

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One-pot synthesis of g-C3N4/V2O5 composites for visible light-driven photocatalytic activity

Cited by 94 publications

References 41 publications

g‐C3N4‐Based Heterostructured Photocatalysts

g‐C3N4‐Based Heterostructured Photocatalysts

Solid-state Synthesis of Composite Structures of Various Cu(I)-based Oxides with g-C3 N4 for Harvesting Solar Energy

Wide‐bandgap HfO2‐V2O5 nanowires heterostructure for visible light‐driven photocatalytic degradation

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Product

Resources

About

g‐C₃N₄‐Based Heterostructured Photocatalysts

g‐C₃N₄‐Based Heterostructured Photocatalysts

Wide‐bandgap HfO₂‐V₂O₅ nanowires heterostructure for visible light‐driven photocatalytic degradation