Dual Z-scheme g-C3N4/Ag3PO4/Ag2MoO4 ternary composite photocatalyst for solar oxygen evolution from water splitting

Liu, Wei; Shen, Jun; Yang, Xiaofei; Liu, Qinqin; Tang, Hua

doi:10.1016/j.apsusc.2018.06.156

Cited by 204 publications

(52 citation statements)

References 67 publications

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“…Therefore, the number of adsorbed photons by photocatalysts decreases and the effective number of photogenerated electrons and holes decrease sharply 30 . Mimicking the natural photosynthesis process, some all solid-state Z-scheme photocatalyst system based on g-C 3 N 4 with other semiconductors were obtained and used, such as WO 3 , Ag 3 PO 4 , BiOX (X=Cl, Br, I), V 2 O 5 , etc 40–44 . A Z-scheme system of g-C 3 N 4 /WO 3 was used to generate hydrogen and its separation mechanisms were also studied deeply 40,45,46 .…”

Section: Introductionmentioning

confidence: 99%

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Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Yuping

et al. 2018

Sci Rep

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Due to low charge separation efficiency and poor stability, it is usually difficult for single-component photocatalysts such as graphitic carbon nitride (g-C3N4) and silver chromate (Ag2CrO4) to fulfill photocatalytic hydrogen production efficiently. Z-scheme charge transport mechanism that mimics the photosynthesis in nature is an effective way to solve the above problems. Inspired by photosynthesis, we report Ag2CrO4 nanoparticles-decorated g-C3N4 nanosheet as an efficient photocatalyst for hydrogen evolution reaction (HER) with methanol as sacrificial agent. The formation of Z-scheme g-C3N4/Ag2CrO4 nanosheets photocatalysts could inhibit the recombination of photogenerated electron-hole pairs, promote the generation of hydrogen by photosplitting of water. The experiment results indicate that g-C3N4/Ag2CrO4 nanocomposites present enhanced photocatalytic activity and stability in the H2 evolution of water splitting. And the nanocomposites g-C3N4/Ag2CrO4(23.1%) show the 14 times HER efficiency compared to that of bare g-C3N4.

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Section: Introductionmentioning

confidence: 99%

“…Liu et al . 44 synthetized a ternary composite photocatalyst g-C 3 N 4 /Ag 3 PO 4 /Ag 2 MoO 4 for water splitting. BiOCl and BiOI were also compounded with g-C 3 N 4 as high efficiency photocatalysts 43,47 .…”

Section: Introductionmentioning

confidence: 99%

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Yuping

et al. 2018

Sci Rep

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“…Similar results have also been observed by previous reports. 31,43,44 Furthermore, the photodegradation efficiency of 10% Ag-W (97%) was almost 3.88 times higher than that of P25. Moreover, the degradation efficiency were further analyzed by using the pseudorst-order model, 45 Àln(C/C 0 ) ¼ kt.…”

Section: Photocatalytic Activitymentioning

confidence: 94%

Facile synthesis of a novel WO₃/Ag₂MoO₄ particles-on-plate staggered type II heterojunction with improved visible-light photocatalytic activity in removing environmental pollutants

Wang

Yang

et al. 2019

RSC Adv.

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“…The metal‐free chemical nature, chemical stability, tunable electronic structure, more abundant and inexpensive components, as well as the more appropriate position of the top of the valence band and bottom of the conduction band for photocatalytic water splitting have led to g‐C 3 N 4 being considered for the development of heterojunction photocatalysts . Since then, g‐C 3 N 4 ‐based composites, such as g‐C 3 N 4 /CeO 2 /Fe 3 O 4 , g‐C 3 N 4 /Ag 3 PO 4 /Ag 2 MoO 4 , ZnIn 2 S 4 ‐g‐C 3 N 4 /BiVO 4 , ZnO‐g‐C 3 N 4 /GO, and ZnO/ZnS/g ‐ C 3 N 4 have been reported. The photocatalytic activity of heterojunction materials can be explained in water splitting through examination of suitable properties such as visible‐light activity, electron–hole pair recombination, overpotential of the heterojunction materials, and the stability in the electrolyte solution.…”

Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

et al. 2020

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have reportedb ismuth oxyhalides (BiOX, X = Cl, I, Br) [12] and their heterojunctions in photocatalytic water splitting, owing to their unique physicochemical properties. [13] Moreover,B iOCl/ BiVO 4 p-n heterojunctions have been reported to enhance the photocatalytic activity and pollutant degradationu nder visiblelight irradiation. [11,14] In ah eterojunction structure, the photocatalytic materials strictly require narrow band gaps, which facilitatev isible-light absorption and proper energy level matching, which in turn facilitates good charget ransfer along with improved oxidation and reductiona bility. [15] Accordingly,t ernary heterojunctions can shown otable improvements through the synergistic effect of the multicomponent,w hich gives rise to the efficient separation of photogenerated electron-hole pairs. Buildingaheterostructure between semiconductors is an encouraging technology to improve photocatalytic activity. [16] Heretofore, numerous designed ternary heterojunction systems have been reported and demonstrated clearly enhanced photocatalytic activity compared with binary systems. [16, 17] Therefore, designing ag -C 3 N 4 -based heterojunction is ag ood approach to enhancing the photocatalytic activity of other materials. [18] The metalfree chemical nature, chemical stability,t unable electronic structure, more abundanta nd inexpensive components,a s well as the more appropriate positionofthe top of the valence band and bottom of the conduction band for photocatalytic water splitting have led to g-C 3 N 4 being considered for the development of heterojunctionp hotocatalysts. [19] Since then, g-C 3 N 4 -based composites, such as g- [18b] have been reported.T he photocatalytic activity of heterojunction materials can be explained in water splitting throughe xamination of suitable properties such as visible-light activity,e lectron-hole pair recombination, overpotential of the heterojunction materials, and the stability in the electrolyte solution.Another issue with hierarchical structured materials is that the synthesis is generally difficult,e xpensive, and requirestoxic templates or surfactants as well as careful control of conditions. The increasingl evel of chemical hazards is as erious problem and various environmental regulations need to be complied with. [24] Therefore, there is an ecessity forr eplacing traditional and hazardous organic solvents in chemical routes of materials synthesis to enable as tep towards more sustainable green chemistry. [25] Deep eutectic solvents (DESs) represent an ewer,n ontoxic,i nexpensive class of alternative mixed solvents ystems, formed upon the mixing of varioush ydrogenbondings alts and charge-neutral species, tof orm al ow-melting liquid that is significantly lower melting than that of the two single components andi si deal around room temperature. [26] DESs are coined as green solvents owing to their properties of high viscosity,c onductivity,s urface tension,a nd biodegradability.A saresult, DESs open new and unrivalled chances to improve the sustainab...

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Dual Z-scheme g-C3N4/Ag3PO4/Ag2MoO4 ternary composite photocatalyst for solar oxygen evolution from water splitting

Cited by 204 publications

References 67 publications

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Facile synthesis of a novel WO₃/Ag₂MoO₄ particles-on-plate staggered type II heterojunction with improved visible-light photocatalytic activity in removing environmental pollutants

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

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Dual Z-scheme g-C3N4/Ag3PO4/Ag2MoO4 ternary composite photocatalyst for solar oxygen evolution from water splitting

Cited by 204 publications

References 67 publications

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Facile synthesis of a novel WO3/Ag2MoO4 particles-on-plate staggered type II heterojunction with improved visible-light photocatalytic activity in removing environmental pollutants

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

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Facile synthesis of a novel WO₃/Ag₂MoO₄ particles-on-plate staggered type II heterojunction with improved visible-light photocatalytic activity in removing environmental pollutants