Highly enhanced photocatalytic degradation of methylene blue over the indirect all-solid-state Z-scheme g-C3N4-RGO-TiO2 nanoheterojunctions

Wu, Fan; Li, Xin; Liu, Wei; Zhang, Shuting

doi:10.1016/j.apsusc.2017.01.285

Cited by 346 publications

(63 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy levels of TiO 2 and PoPD are as follows: E (LUMO) > E (CB) > E (HOMO) > E (VB) 42 . Under irradiation, the electrons are excited from the HOMO to the LUMO to the CB.…”

Section: Resultsmentioning

confidence: 99%

Highly-efficient photocatalytic degradation of methylene blue by PoPD-modified TiO 2 nanocomposites due to photosensitization-synergetic effect of TiO2 with PoPD

Yang

Dong

Cui

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Poly-o-phenylenediamine modified TiO2 nanocomposites were successfully synthesized via an ‘in situ’ oxidative polymerization method. The modified nanocomposites were characterized by BET, XRD, TEM, FT-IR, TGA, XPS, EA and UV-Vis DRS. The photocatalytic degradation of methylene blue was chosen as a model reaction to evaluate the photocatalytic activities of TiO2 and PoPD/TiO2. The results indicated that PoPD/TiO2 nanocomposites exhibited good photocatalytic activity and stability. The photocatalytic activity of PoPD/TiO2 increased as the initial pH increased because of electrostatic adsorption between the photocatalyst and MB as well as the generation of ·OH, whereas it exhibited an earlier increasing and later decreasing trend as the concentration of the photocatalyst increased owing to the absorption of visible light. The photocatalytic stability of the PoPD/TiO2 nanocomposite was dependent on the stability of its structure. Based on radical trapping experiments and ESR measurements, the origin of oxidizing ability of PoPD/TiO2 nanocomposites on photocatalytic degradation of MB was proposed, which taking into account of ·OH and ·O2 − were the first and second important ROS, respectively. The possible photocatalytic mechanism and photocatalytic activity enhanced mechanism has been proposed, taking into account the photosensitization effect and synergetic effect of TiO2 with PoPD.

show abstract

“…The energy levels of TiO 2 and PoPD are as follows: E (LUMO) > E (CB) > E (HOMO) > E (VB) 42 . Under irradiation, the electrons are excited from the HOMO to the LUMO to the CB.…”

Section: Resultsmentioning

confidence: 99%

Highly-efficient photocatalytic degradation of methylene blue by PoPD-modified TiO 2 nanocomposites due to photosensitization-synergetic effect of TiO2 with PoPD

Yang

Dong

Cui

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…[57,[59][60][61][62] The carbon support acts as ar epository,i nw hich electrons are captured, transported, and accumulated. [57,[59][60][61][62] The carbon support acts as ar epository,i nw hich electrons are captured, transported, and accumulated.…”

Section: Graphitic Carbon Nitride/titanium Dioxide/ Graphene/carbon Nmentioning

confidence: 99%

“…Amongd ifferent types of carbonaceous materials, CNTsh ave attracted significant attention owing to their p-conjugated structure. [61] use rGO to improvet he photocatalytic activity of GCN/TiO 2 and fabricate ternary composites by a liquid-precipitation strategy.T he activity of the catalyst consistingo fG CN/TiO 2 with 10 wt %r GO is 3.2 and 4.7 times higherc ompared to GCN/TiO 2 and GCN for the degradationo f MB under simulateds olar light, respectively.T he ternary GCN-TiO 2 /rGO composite shows remarkable photocatalytic performance in H 2 evolution. The ternary catalyst exhibits enhanced photocatalytic performance in the degradation of RhB and MB (98.2 and 97.9 %) under visible-light irradiation.…”

Section: Graphitic Carbon Nitride/titanium Dioxide/ Graphene/carbon Nmentioning

confidence: 99%

“…Moreover,i ti sa ssumed that the immobilization of carbon materials onto GCN/TiO 2 composites can further improvet he photocatalytic activity. [57,[59][60][61][62] The carbon support acts as ar epository,i nw hich electrons are captured, transported, and accumulated. Amongd ifferent types of carbonaceous materials, CNTsh ave attracted significant attention owing to their p-conjugated structure.…”

Section: Graphitic Carbon Nitride/titanium Dioxide/ Graphene/carbon Nmentioning

confidence: 99%

“…[60] The catalystd emonstratesr emarkable visible-light activity in the decolorization of RhB (over 98 %) and excellent stability( almost 76 %a fter four cycles).W ue tal. [61] use rGO to improvet he photocatalytic activity of GCN/TiO 2 and fabricate ternary composites by a liquid-precipitation strategy.T he activity of the catalyst consistingo fG CN/TiO 2 with 10 wt %r GO is 3.2 and 4.7 times higherc ompared to GCN/TiO 2 and GCN for the degradationo f MB under simulateds olar light, respectively.T he ternary GCN-TiO 2 /rGO composite shows remarkable photocatalytic performance in H 2 evolution. The structure can be synthesized by afacile ultrasonic-assisted wet-impregnation method.…”

Section: Graphitic Carbon Nitride/titanium Dioxide/ Graphene/carbon Nmentioning

confidence: 99%

See 2 more Smart Citations

Graphitic Carbon Nitride and Titanium Dioxide Modified with 1 D and 2 D Carbon Structures for Photocatalysis

et al. 2018

View full text Add to dashboard Cite

Enhancing the photocatalytic performance of graphitic carbon nitride (g-C N , GCN) and titanium dioxide (TiO ) has played a key role in the energy and environmental protection research community. Therefore, it is necessary to explore the synergy of both materials with carbon nanostructures for photocatalysis. Among the variety of carbon materials, graphene flakes and nanotubes, as nanoadditives to improve electron charge transfer and the optical absorption behavior in the visible-light region, have been widely explored. Thus, flake-like (2 D) and tubular (1 D) carbon structures in composition with GCN and/or TiO are reviewed, as are their photocatalytic response. Current trends clearly indicate that this type of molecular hybrids can be efficiently exploited in this field. This Minireview covers state-of-the-art research over the period of 2015 to 2018.

show abstract

Z‐Scheme Photocatalytic Systems for Solar Water Splitting

et al. 2020

View full text Add to dashboard Cite

As the world decides on the next giant step for the renewable energy revolution, scientists have begun to reinforce their headlong dives into the exploitation of solar energy. Hitherto, numerous attempts are made to imitate the natural photosynthesis of plants by converting solar energy into chemical fuels which resembles the “Z‐scheme” process. A recreation of this system is witnessed in artificial Z‐scheme photocatalytic water splitting to generate hydrogen (H2). This work outlines the recent significant implication of the Z‐scheme system in photocatalytic water splitting, particularly in the role of electron mediator and the key factors that improve the photocatalytic performance. The Review begins with the fundamental rationales in Z‐scheme water splitting, followed by a survey on the development roadmap of three different generations of Z‐scheme system: 1) PS‐A/D‐PS (first generation), 2) PS‐C‐PS (second generation), and 3) PS‐PS (third generation). Focus is also placed on the scaling up of the “leaf‐to‐tree” challenge of Z‐scheme water splitting system, which is also known as Z‐scheme photocatalyst sheet. A detailed investigation of the Z‐scheme system for achieving H2 evolution from past to present accompanied with in‐depth discussion on the key challenges in the area of Z‐scheme photocatalytic water splitting are provided.

show abstract

Highly enhanced photocatalytic degradation of methylene blue over the indirect all-solid-state Z-scheme g-C3N4-RGO-TiO2 nanoheterojunctions

Cited by 346 publications

References 92 publications

Highly-efficient photocatalytic degradation of methylene blue by PoPD-modified TiO 2 nanocomposites due to photosensitization-synergetic effect of TiO2 with PoPD

Highly-efficient photocatalytic degradation of methylene blue by PoPD-modified TiO 2 nanocomposites due to photosensitization-synergetic effect of TiO2 with PoPD

Graphitic Carbon Nitride and Titanium Dioxide Modified with 1 D and 2 D Carbon Structures for Photocatalysis

Z‐Scheme Photocatalytic Systems for Solar Water Splitting

Contact Info

Product

Resources

About