Synthesis of CdSe Quantum-Dots-Sensitized TiO2 Nanocomposites with Visible-Light Photocatalytic Activity

CdSe Quantum Dots (QDs) sensitized TiO2 photocatylysts were synthesized by a facile sol-gel method at room temperature. The effects of CdSe QDs concentration on the properties of the photocatalysts were studied by XRD, BET, SEM, UV/vis. The photocatalytic performance was investigated by degrading methylene blue (MB) under halogen-tungsten lamp irradiation. The results revealed that the catalysts doped with CdSe QDs show large surface area, small crystal size and narrow band gap. The catalysts doped with 0.05% CdSe QDs possessed the best activity, and the degradation efficiency of methylene blue (MB) is up to 99.2% within 180 min.

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Synthesis and Detection the Thermal Expansion of CdSe Quantum Dots from Room Temperature to 700°C

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.35.11 ◽

2015 ◽

Vol 35 ◽

pp. 11-20 ◽

Cited By ~ 2

Author(s):

Zi Yan Zhao ◽

Ying Zhou ◽

Feng Gang Bian ◽

Kun Hao Zhang

Keyword(s):

Quantum Dots ◽

Thermal Expansion ◽

Thermal Properties ◽

Room Temperature ◽

Cdse Quantum Dots ◽

Cdse Qds ◽

In Situ Xafs

In this paper, we synthesized the CdSe quantum dots (QDs) about 4.5 nm, and using the in-situ XAFS technique to study the thermal expansion of CdSe QDs from room temperature to 700°C. We find that the thermal expansion of the CdSe QDs is about 2.0×10-5/K, which is bigger than the bulk CdSe (3~8×10-6/K). This can demonstrate that the thermal properties of CdSe QDs is related to the size of the dots, which means the thermal expansion is reducing as the size of the nanoparticles increasing. Keywords: CdSe quantum dots, thermal expansion, EXAFS technique

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Intense Visible Luminescence in CdSe Quantum Dots by Efficiency Surface Passivation with H2O Molecules

Journal of Nanomaterials ◽

10.1155/2012/892506 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6

Author(s):

Hyeoung Woo Park ◽

Do-Hyung Kim

Keyword(s):

Heat Treatment ◽

Quantum Dots ◽

Quantum Yield ◽

Surface Passivation ◽

Cdse Quantum Dots ◽

Cdse Qds ◽

Effect Of Water ◽

Visible Luminescence ◽

Luminescence Efficiency

We have investigated the effect of water (H2O) cooling and heat treatment on the luminescence efficiency of core CdSe quantum dots (QDs). The photoluminescence (PL) quantum yield of the CdSe QDs was enhanced up to ~85%, and some periodic bright points were observed in wide color ranges during the heat treatment of QDs mixed with H2O. The PL enhancement of QDs could be attributed to the recovery of QDs surface traps by unreacted ligands confined within the hydrophilic H2O molecule containers.

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ZnO-SiO2/Laponite Photocatalyst: Kinetic Study on Photocatalytic Decolorization of Methylene Blue

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.896.541 ◽

2014 ◽

Vol 896 ◽

pp. 541-544

Author(s):

Is Fatimah ◽

N. Nunani Yuyun

Keyword(s):

Methylene Blue ◽

Energy Dispersive Spectrometry ◽

Photocatalytic Performance ◽

Sol Gel ◽

X Ray Diffraction ◽

X Ray ◽

Photocatalytic Decolorization ◽

Uv Visible ◽

Gel Preparation ◽

Adsorption Desorption

ZnO-SiO2/Laponite was prepared by sol-gel preparation procedure consit of SiO2 pillarization to laponite followed by ZnO dispersion by using zinc acetate as precursor. The obtained material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), diffuse reflectance UV-Visible (DRUV-Vis) and N2 adsorption-desorption analysis. The photocatalytic performance of the amterial in methylene blue decolorization was also investigated. Compared with ZnO-SiO2 nanoparticles, it is concluded that ZnO-SiO2/Laponite possess higher photocatalytic activity which obey Temkin isotherm model.

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Developed one-pot synthesis of dual-color CdSe quantum dots for white light-emitting diode application

Journal of Materials Chemistry C ◽

10.1039/c8tc00348c ◽

2018 ◽

Vol 6 (12) ◽

pp. 3089-3096 ◽

Cited By ~ 9

Author(s):

Sheng Dai ◽

Cyuan-Bin Siao ◽

Shu-Ru Chung ◽

Kuan-Wen Wang ◽

Xiaoqing Pan

Keyword(s):

Quantum Dots ◽

White Light ◽

Light Emitting Diode ◽

Cdse Quantum Dots ◽

Cdse Qds ◽

One Pot ◽

Synthetic Process ◽

Light Emitting ◽

One Pot Synthesis ◽

Enhanced Stability

The size and fraction of red and green CdSe QDs can be controlled precisely during the synthetic process, thus manifesting remarkably enhanced stability.

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Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures

New Journal of Chemistry ◽

10.1039/c8nj01656a ◽

2018 ◽

Vol 42 (13) ◽

pp. 11109-11116 ◽

Cited By ~ 7

Author(s):

R. Salimi ◽

A. A. Sabbagh Alvani ◽

N. Naseri ◽

S. F. Du ◽

D. Poelman

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Visible Light ◽

Visible Light Irradiation ◽

Photocatalytic Performance ◽

Sol Gel ◽

Light Irradiation ◽

Photo Degradation ◽

Gel Method ◽

Sol Gel Method

A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.

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Photocatalytic Performance Analysis of Bi 2 WO 6 Modified with CdSe Quantum Dots in Different Solvents

ChemistrySelect ◽

10.1002/slct.202001961 ◽

2020 ◽

Vol 5 (31) ◽

pp. 9563-9571

Author(s):

Zhengguang Chen ◽

Zuowei Zhang ◽

Hongshun Hao ◽

Liangliang Zhu ◽

Chao Ding ◽

...

Keyword(s):

Quantum Dots ◽

Performance Analysis ◽

Photocatalytic Performance ◽

Cdse Quantum Dots

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Erratum: “Narrow luminescence lines from self-assembled CdSe quantum dots at room temperature” [Appl. Phys. Lett. 78, 297 (2001)]

Applied Physics Letters ◽

10.1063/1.1377866 ◽

2001 ◽

Vol 78 (23) ◽

pp. 3749-3749

Author(s):

Z. H. Zheng ◽

K. Okamoto ◽

H. C. Ko ◽

Y. Kawakami ◽

Sg. Fujita

Keyword(s):

Quantum Dots ◽

Room Temperature ◽

Cdse Quantum Dots ◽

Self Assembled

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Facile synthesis of mesoporous titanium dioxide doped by Ag-coated graphene with enhanced visible-light photocatalytic performance for methylene blue degradation

RSC Advances ◽

10.1039/c7ra02198d ◽

2017 ◽

Vol 7 (41) ◽

pp. 25314-25324 ◽

Cited By ~ 14

Author(s):

Lin Xiao ◽

Li Youji ◽

Chen Feitai ◽

Xu Peng ◽

Li Ming

Keyword(s):

Methylene Blue ◽

Titanium Dioxide ◽

Visible Light ◽

Photocatalytic Performance ◽

Solvothermal Method ◽

Sol Gel ◽

Facile Synthesis ◽

Methylene Blue Degradation ◽

Visible Light Driven ◽

Visible Light Photocatalytic

A highly efficient and elaborately structured visible-light-driven catalyst composed of mesoporous TiO2 (MT) doped with Ag+-coated graphene (MT-Ag/GR) has been successfully fabricated by a sol–gel and solvothermal method.

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Optimizing electron transfer from CdSe QDs to hydrogenase for photocatalytic H2 production

Chemical Communications ◽

10.1039/c9cc01150a ◽

2019 ◽

Vol 55 (39) ◽

pp. 5579-5582 ◽

Cited By ~ 16

Author(s):

Monica L. K. Sanchez ◽

Chang-Hao Wu ◽

Michael W. W. Adams ◽

R. Brian Dyer

Keyword(s):

Quantum Dots ◽

Electron Transfer ◽

Reduction Potential ◽

H2 Production ◽

Cdse Quantum Dots ◽

Redox Mediators ◽

Cdse Qds ◽

Electron Shuttles ◽

Hydrogenase Enzyme

A series of viologen related redox mediators of varying reduction potential has been characterized and their utility as electron shuttles between CdSe quantum dots and hydrogenase enzyme has been demonstrated.

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