Synthesis of N-Doped Graphene Oxide Quantum Dots with the Internal P-N Heterojunction and Its Photocatalytic Performance under Visible Light Illumination

2018 ◽  
Vol 21 (1) ◽  
pp. 44-53
Author(s):  
Weiqiang Zhang ◽  
Xiufang Zhang ◽  
Xiaoli Dong ◽  
Hongchao Ma ◽  
Guowen Wang
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Doped Graphene ◽  
Graphene Oxide Quantum Dots

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

Novel magnetically separable Fe3O4–WSe2/NG photocatalysts: synthesis and photocatalytic performance under visible-light irradiation

2018 ◽  
Vol 42 (11) ◽  
pp. 8914-8923 ◽  
Author(s):  
Baihong An ◽  
Yanan Liu ◽  
Chengcheng Xu ◽  
Han Wang ◽  
Jun Wan
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Light Irradiation ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Magnetically Separable

Visible light responsive Fe3O4–WSe2/NG (nitrogen doped graphene oxide) heterojunction nanocomposites were synthesized by a hydrothermal synthesis route, in which Fe3O4 and WSe2 particles were coated on the surface of NG.

Sulfur-Doped Graphene Oxide Quantum Dots as Photocatalysts for Hydrogen Generation in the Aqueous Phase

ChemSusChem ◽  
2017 ◽  
Vol 10 (16) ◽  
pp. 3260-3267 ◽  
Author(s):  
Jacek Gliniak ◽  
Jia-Hoa Lin ◽  
Yi-Ting Chen ◽  
Chuen-Ru Li ◽  
Efat Jokar ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Aqueous Phase ◽  
Hydrogen Generation ◽  
Doped Graphene ◽  
Graphene Oxide Quantum Dots

Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation

RSC Advances ◽  
2014 ◽  
Vol 4 (57) ◽  
pp. 30090-30099 ◽  
Author(s):  
Wenshu Tang ◽  
Yu Su ◽  
Xiaoxin Wang ◽  
Qi Li ◽  
Shian Gao ◽  
...  
Keyword(s):  
Visible Light ◽  
Magnetic Separation ◽  
Photocatalytic Performance ◽  
Light Illumination ◽  
Composite Photocatalyst ◽  
Highly Efficient ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

A novel superparamagnetic Ag@silver-based salt photocatalyst was created with highly efficient visible light photocatalytic performance and easy magnetic separation.

Multiple doping of graphene oxide foams and quantum dots: new switchable systems for oxygen reduction and water remediation

2015 ◽  
Vol 3 (27) ◽  
pp. 14334-14347 ◽  
Author(s):  
M. Favaro ◽  
F. Carraro ◽  
M. Cattelan ◽  
L. Colazzo ◽  
C. Durante ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Oxygen Reduction ◽  
Electrochemical Method ◽  
Three Dimensional ◽  
Environmentally Friendly ◽  
Water Remediation ◽  
Doped Graphene ◽  
Graphene Oxide Quantum Dots ◽  
Boron Nitrogen

Single- and multi-boron, nitrogen, sulphur doped graphene oxide quantum dots and three-dimensional foams are synthesized by a simple and environmentally friendly electrochemical method.

Enhanced Ciprofloxacin Degradation Over Pt@BaZrO3/g-C3N4 Heterojunctions Beneath Visible Light Illumination

2020 ◽  
Vol 12 (7) ◽  
pp. 874-884
Author(s):  
Maha Alhaddad
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Charge Carriers ◽  
Superior Performance ◽  
Photocatalytic Decomposition ◽  
Light Illumination ◽  
Great Ability ◽  
Visible Light Illumination ◽  
Essential Parameter

In this investigation, various proportions of Pt@BaZrO3 (at 1∼4 wt.%) accommodating 2.0 wt% Pt were adopted to establish Pt@BaZrO3/g-C3N4 nanocomposites of improved photocatalytic performance. H2PtCl6 nanoparticles as well as mesoporous BaZrO3 and g-C3N4 were utilized to develop the prescribed nanocomposites via sonication-mixture routine. The photocatalytic achievement for the upgraded Pt@BaZrO3/g-C3N4 nanocomposites beneath visible light irradiation were tested by examining ciprofloxacin (CIP) degradation. Enhanced charge transfer and retarded charges’ recombination were established amid Pt, BaZrO3 NPs and g-C3N4 nanosheets in the developed heterojunctions. The proportion (wt.%) of Pt@BaZrO3 was found to be an essential parameter in governing the photocatalytic efficacy of the promoted Pt@BaZrO3/g-C3N4 nanocomposites. Moreover, complete photocatalytic decomposition of CIP was established over Pt@BaZrO3/g-C3N4 nanocomposite, accommodating 3 wt.% Pt@BaZrO3 NPs. Such superior performance was correlated to the great ability of the Pt@BaZrO3/g-C3N4 to absorb visible light in addition to the prolonged charge separation amid the photo-induced charge carriers.

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