Novel visible-light-driven AgX/graphite-like C3N4 (X=Br, I) hybrid materials with synergistic photocatalytic activity

Xu, Hui; Yan, Jia; Song, Yanhua; Li, Huaming; Huang, Chuanjing; Wan, Huilin

doi:10.1016/j.apcatb.2012.08.015

Cited by 621 publications

(234 citation statements)

References 81 publications

Supporting

Mentioning

212

Contrasting

Order By: Relevance

“…This indicates that the BET surface area is not directly related to the photocatalytic activity. Similar observations were also made for a number of other photocatalysts based on heterojunctions of g-C 3 N 4 with compounds such as Zn 2 SnO 4 [21], CdIn 2 S 4 [22], silver halides [23], SmVO 4 [24] or CaIn 2 S 4 [11]. In these cases, enhanced photoactivities have been ascribed to improved stability of separated charge carriers and/or to improved light absorption in the composites.…”

Section: Characterization Of As-prepared and Used Catalystssupporting

confidence: 56%

Relations between Structure, Activity and Stability in C3N4 Based Photocatalysts Used for Solar Hydrogen Production

et al. 2018

View full text Add to dashboard Cite

Solar hydrogen production from water could be a sustainable and environmentally friendly alternative to fossil energy carriers, yet so far photocatalysts active and stable enough for large-scale applications are not available, calling for advanced research efforts. In this work, H 2 evolution rates of up to 1968 and 5188 µmol h −1 g −1 were obtained from aqueous solutions of triethanolamine (TEOA) and oxalic acid (OA), respectively, by irradiating composites of AgIn 5 S 8 (AIS), mesoporous C 3 N 4 (CN, surface area >150 m 2 /g) and ≤2 wt.% in-situ photodeposited Pt nanoparticles (NPs) with UV-vis (≥300 nm) and pure visible light (≥420 nm). Structural properties and electron transport in these materials were analyzed by XRD, STEM-HAADF, XPS, UV-vis-DRS, ATR-IR, photoluminescence and in situ-EPR spectroscopy. Initial H 2 formation rates were highest for Pt/CN, yet with TEOA this catalyst deactivated by inclusion of Pt NPs in the matrix of CN (most pronounced at λ ≥ 300 nm) while it remained active with OA, since in this case Pt NPs were enriched on the outermost surface of CN. In Pt/AIS-CN catalysts, Pt NPs were preferentially deposited on the surface of the AIS phase which prevents them from inclusion in the CN phase but reduces simultaneously the initial H 2 evolution rate. This suggests that AIS hinders transport of separated electrons from the CN conduction band to Pt NPs but retains the latter accessible by protons to produce H 2 .

show abstract

Section: Characterization Of As-prepared and Used Catalystssupporting

confidence: 56%

Relations between Structure, Activity and Stability in C3N4 Based Photocatalysts Used for Solar Hydrogen Production

et al. 2018

View full text Add to dashboard Cite

show abstract

“…As can be seen from C 1s spectra (Fig. 4a), the C peaks at the binding energy of 284.6 and 288.1 eV for g-C 3 N 4 are assigned to surface adventitious carbon and defect-containing sp 2 -bonded carbon, respectively [27,41]. The C ls spectrum of 2-Ta 3 N 5 /g-C 3 N 4 is similar to that of g-C 3 N 4 , but the peak at 288.1 eV in g-C 3 N 4 for defect-containing sp 2 -bonded carbon shifts 0.4 eV towards lower binding energy 12 (287.7 eV).…”

Section: Characterization Of As-prepared Samplesmentioning

confidence: 83%

“…For pure g-C 3 N 4 , the identified peaks at 13.1° and 27.4° correspond to the (100) and (002) (marked with •f •) diffraction planes, respectively (JCPDS 87-1526) [35]. The former is associated with the interlayer structural packing, and the latter is related to the stacking of the conjugated aromatic system [27,36]. As for the Ta 3 N 5 /g-C 3 N 4 composites, the XRD patterns display the combination of two sets of diffraction data for both g-C 3 N 4 and Ta To further investigate the hybrid combination and interaction between g-C 3 N 4 and Ta 3 N 5 in Ta 3 N 5 /g-C 3 N 4 hybrid nitrides, the FT-IR spectroscopy was carried out and the results are shown in Fig.…”

Section: Characterization Of As-prepared Samplesmentioning

confidence: 99%

“…This carbon nitride is thermally stable and has a narrow band gap of ~2.7 eV owing to the À-conjugated graphitic planes consisted of the sp 2 hybridization of the carbon and nitrogen, so it responds to visible light with wavelengths up to 460 nm [24][25][26]. However, the photocatalytic activity of individual g-C 3 N 4 is restricted because of the fast recombination of photogenerated electron-hole pairs, poor quantum efficiency and the relatively narrow range of photon-response (as it absorbs irradiation with wavelength shorter than 460nm only) [27]. Therefore, it is of great value to extend the light absorption of g-C 3 N 4 up to a larger portion of the available solar spectrum and retard the recombination of electron and hole.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Jiang

Chen

et al. 2017

Applied Surface Science

View full text Add to dashboard Cite

2017) Construction of stable Ta3N5/g-C3N4 metal/non-metal nitride hybrids with enhanced visible-light photocatalysis. Applied Surface Science, 391, pp. 392-403. (doi:10.1016Science, 391, pp. 392-403. (doi:10. /j.apsusc.2016 This is the author's final accepted version.There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it.http://eprints.gla.ac.uk/123441/ AbstractIn this paper, a novel Ta The Ta 3 N 5 /g-C 3 N 4 hybrid nitride exhibited excellent photostability and reusability.The possible mechanism for improved photocatalytic performance was proposed.Overall, this work may provide a facile way to synthesize the highly efficient metal/metal-free hybrid nitride photocatalysts with promising applications in environmental purification and energy conversion.

show abstract

“…In AgBr-supported metal-free g-C 3 N 4 -decorated Nitrogendoped graphene (CN) ternary nanocomposites (ACNNG-x), Z-scheme heterogeneous structure consisting of AgBr and CN with different energy level has been proved to be an effective 2 Deposition Photodegradation of organic pollutants [292] rule to photocatalytic degradation of MO and CO 2 photoreduction under visible light [299][300][301][302][303][304][305]. Two charge carriers separation mechanisms were involved in this system before and after the generation of metallic Ag 0 nanoparticles.…”

Section: Other Photoactive Semiconductormentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

View full text Add to dashboard Cite

The silver halides and their corresponding composites would constitute remarkable photocatalytic systems not only in energy production but also in environmental remediation. The major advantage in these silver halides system is that plasma metal Ag 0 species would be spontaneously generated by silver halides under light irradiation, which play dual roles of expanding light absorption range and charge carriers separation. In this tutorial review, the origin and development of silver halides, synthesis methods, construction of composite structures with other materials, photocatalytic applications, and various and controversial mechanisms are all exhaustively described.

show abstract

Novel visible-light-driven AgX/graphite-like C3N4 (X=Br, I) hybrid materials with synergistic photocatalytic activity

Cited by 621 publications

References 81 publications

Relations between Structure, Activity and Stability in C3N4 Based Photocatalysts Used for Solar Hydrogen Production

Relations between Structure, Activity and Stability in C3N4 Based Photocatalysts Used for Solar Hydrogen Production

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

Regulations of silver halide nanostructure and composites on photocatalysis

Contact Info

Product

Resources

About