Decoration of upconversion nanocrystals with metal sulfide quantum dots by a universal in situ controlled growth strategy

Nanoscale ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 3977-3987 ◽  
Author(s):  
Kaimin Du ◽  
Pengpeng Lei ◽  
Manli Zhang ◽  
Xuan Gao ◽  
Shuang Yao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Sulfide ◽  
Growth Strategy ◽  
Controlled Growth ◽  
Upconversion Nanocrystals

Multifunctional NaYF4:Yb/Er@CS@Mn+S (M = Ag, Cu, Cd) nanocomposites could be prepared by a universal in situ controlled growth strategy.

Site-controlled growth and luminescence of InAs quantum dots using in situ Ga-assisted deoxidation of patterned substrates

2008 ◽  
Vol 93 (10) ◽  
pp. 101908 ◽  
Author(s):  
P. Atkinson ◽  
S. Kiravittaya ◽  
M. Benyoucef ◽  
A. Rastelli ◽  
O. G. Schmidt
Keyword(s):  
Quantum Dots ◽  
Controlled Growth ◽  
Patterned Substrates ◽  
Inas Quantum Dots

Photodeposition of Metal Sulfide Quantum Dots on Titanium(IV) Dioxide and its Applications

2011 ◽  
Vol 1352 ◽  
Author(s):  
Hiroaki Tada
Keyword(s):  
Quantum Dots ◽  
Irradiation Time ◽  
Low Cost ◽  
Metal Sulfide ◽  
Metal Sulfides ◽  
Nanocrystalline Films ◽  
Short Period ◽  
Sensitized Solar Cells ◽  
Excellent Reproducibility

ABSTRACTIn situ photodeposition techniques taking advantage of the TiO2 photocatalysis have been developed for coupling metal sulfide quantum dots (QDs) and TiO2 at a nonoscale. The coupled metal sulfide-TiO2 systems possess the following characteristics: (I) a large amount of metal sulfides can be directly formed on TiO2 during a fairly short period with excellent reproducibility, (II) the band energies of metal sulfides QDs are widely tunable by irradiation time, (III) metal sulfide QDs can be deposited on not only the external surfaces but also the inner ones of mesoporous TiO2 nanocrystalline films without pore-blocking, (IV) the simple solution-based technique at low temperature enables the low-cost production, (V) this technique has a wide possibility for coupling TiO2 and narrow gap metal sulfides. These unique features produce the excellent performances of the resulting heteronanojunaction systems as the photoanodes for QD-sensitized solar cells.

Gum Arabic Microgels As Template for In Situ Metal-Sulfide Based Quantum Dots Preparation and Their Thermal, Spectroscopic, Optical, and Magnetic Characterization

2017 ◽  
Vol 46 (7) ◽  
pp. 4373-4383 ◽  
Author(s):  
Muhammad Farooq ◽  
Selin Sagbas ◽  
Mustafa Yildiz ◽  
Kadem Meral ◽  
Mohammad Siddiq ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Sulfide ◽  
Gum Arabic ◽  
Magnetic Characterization

scholarly journals Carbon Nitride Quantum Dots Modified TiO2 Inverse Opal Photonic Crystal for Solving Indoor VOCs Pollution

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 464
Author(s):  
Jie Yu ◽  
Angel Caravaca ◽  
Chantal Guillard ◽  
Philippe Vernoux ◽  
Liang Zhou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Green Energy ◽  
Inverse Opal ◽  
Oxidation Reactions ◽  
Composite Photocatalyst ◽  
Colloidal Photonic Crystals ◽  
Inverse Opal Structure

Indoor toxic volatile organic compounds (VOCs) pollution is a serious threat to people’s health and toluene is a typical representative. In this study, we developed a composite photocatalyst of carbon nitride quantum dots (CNQDs) in situ-doped TiO2 inverse opal TiO2 IO for efficient degradation of toluene. The catalyst was fabricated using a sol-gel method with colloidal photonic crystals as the template. The as-prepared catalyst exhibited excellent photocatalytic performance for degradation of toluene. After 6 h of simulated sunlight irradiation, 93% of toluene can be converted into non-toxic products CO2 and H2O, while only 37% of toluene is degraded over commercial P25 in the same condition. This greatly enhanced photocatalytic activity results from two aspects: (i) the inverse opal structure enhances the light harvesting while providing adequate surface area for effective oxidation reactions; (ii) the incorporation of CNQDs in the framework of TiO2 increases visible light absorption and promotes the separation of photo-generated charges. Collectively, highly efficient photocatalytic degradation of toluene has been achieved. In addition, it can be expanded to efficient degradation of organic pollutants in liquid phase such as phenol and Rhodamine B. This study provides a green, energy saving solution for indoor toxic VOCs removal as well as for the treatment of organic wastewater.

In situ ligand exchange of thiol-capped CuInS2/ZnS quantum dots at growth stage without affecting luminescent characteristics

2011 ◽  
Vol 363 (2) ◽  
pp. 703-706 ◽  
Author(s):  
Hyunki Kim ◽  
Minwon Suh ◽  
Byung-Hwa Kwon ◽  
Dong Seon Jang ◽  
Sung Wook Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Growth Stage

Au‐Doped Ag 2 Te Quantum Dots with Bright NIR‐IIb Fluorescence for In Situ Monitoring of Angiogenesis and Arteriogenesis in a Hindlimb Ischemic Model

2021 ◽  
pp. 2103953
Author(s):  
Hongchao Yang ◽  
Haoying Huang ◽  
Xiang Ma ◽  
Yejun Zhang ◽  
Xiaohu Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
In Situ Monitoring
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