scholarly journals Formation of uniform PbS quantum dots by a spin-assisted successive precipitation and anion exchange reaction process using PbX2 (X = Br, I) and Na2S precursors

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3072-3077 ◽  
Author(s):  
Jin Hyuck Heo ◽  
Min Hyeok Jang ◽  
Min Ho Lee ◽  
Myoung Sang You ◽  
Sang-Wook Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Reaction Process ◽  
Pbs Quantum Dots ◽  
Anion Exchange Reaction

We devised a straightforward spin-assisted successive precipitation and anion exchange reaction (spin-SPAER) process in order to deposit relatively uniform PbS quantum dots (QDs) on mesoporous TiO2 (mp-TiO2).

Formation of highly luminescent cesium bismuth halide perovskite quantum dots tuned by anion exchange

2018 ◽  
Vol 54 (30) ◽  
pp. 3779-3782 ◽  
Author(s):  
Yongbing Lou ◽  
Mengying Fang ◽  
Jinxi Chen ◽  
Yixin Zhao
Keyword(s):  
Thermal Stability ◽  
Quantum Dots ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Wavelength Range ◽  
Quantum Yields ◽  
Excellent Thermal Stability ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Anion Exchange Reaction

Cs3Bi2Br9 quantum dots, with excellent thermal stability and photoluminescence quantum yields of up to 22%, have been prepared. A PL wavelength range from 380 to 526 nm could be achieved through a fast reversible anion exchange reaction.

scholarly journals Thorny CdSe nanotubes via an aqueous anion exchange reaction process and their photoelectrochemical applications

2012 ◽  
Vol 22 (39) ◽  
pp. 20889 ◽  
Author(s):  
Jeong Won Kim ◽  
Hee-Sang Shim ◽  
SungWook Ko ◽  
Unyoung Jeong ◽  
Chang-Lyoul Lee ◽  
...  
Keyword(s):  
Exchange Reaction ◽  
Anion Exchange ◽  
Reaction Process ◽  
Anion Exchange Reaction

Construction of uniform Co–Sn–X (X = S, Se, Te) nanocages with enhanced photovoltaic and oxygen evolution properties via anion exchange reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 22012-22024 ◽  
Author(s):  
Qian He ◽  
Shuolin Li ◽  
Shaowei Huang ◽  
Longqiang Xiao ◽  
Linxi Hou
Keyword(s):  
Exchange Reaction ◽  
Anion Exchange ◽  
Oxygen Evolution ◽  
Highly Efficient ◽  
Anion Exchange Reaction

Co–Sn–X (X = S, Se, Te) nanocages have been synthesized as highly efficient electrocatalysts for DSSCs and OER.

CsPbBr3 perovskite nanocrystals as highly selective and sensitive spectrochemical probes for gaseous HCl detection

2017 ◽  
Vol 5 (2) ◽  
pp. 309-313 ◽  
Author(s):  
Xiao Chen ◽  
Huawei Hu ◽  
Zhaoming Xia ◽  
Wei Gao ◽  
Wangyan Gou ◽  
...  
Keyword(s):  
Exchange Reaction ◽  
Anion Exchange ◽  
Ambient Conditions ◽  
Perovskite Nanocrystals ◽  
Anion Exchange Reaction

A rapid and facile gaseous anion-exchange reaction between CsPbBr3 perovskite nanocrystals and HCl vapor was carried out under the ambient conditions.

Structural and microstructural changes during anion exchange of CoAl layered double hydroxides: anin situX-ray powder diffraction study

2010 ◽  
Vol 43 (3) ◽  
pp. 434-447 ◽  
Author(s):  
Rune E. Johnsen ◽  
Frank Krumeich ◽  
Poul Norby
Keyword(s):  
Phase Transformation ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Powder Diffraction ◽  
Layered Double Hydroxides ◽  
Two Phase ◽  
X Ray ◽  
Double Hydroxides ◽  
Anion Exchange Reaction

Anion-exchange processes in cobalt–aluminium layered double hydroxides (LDHs) were studied byin situsynchrotron X-ray powder diffraction (XRPD). The processes investigated were CoAl–CO3→ CoAl–Cl → CoAl–CO3, CoAl–Cl → CoAl–NO3and CoAl–CO3→ CoAl–SO4. The XRPD data show that the CoAl–CO3→ CoAl–Cl process is a two-phase transformation, where the amount of the CoAl–CO3phase decreases exponentially while that of the CoAl–Cl phase increases exponentially. Energy-dispersive X-ray spectroscopy (EDXS) studies of a partially chloride-exchanged CoAl–CO3LDH sample along within situXRPD data suggested that the individual particles in the CoAl–CO3sample are generally anion-exchanged with chloride one at a time. In contrast with the CoAl–CO3→ CoAl–Cl transformation, the XRPD data show that the reverse CoAl–Cl → CoAl–CO3process is a one-phase transformation. Rietveld refinements indicate that the occupancy factors of the carbon and oxygen sites of the carbonate group increase, while that of the chloride site decreases. In the CoAl–Cl → CoAl–NO3anion-exchange reaction, the XRPD patterns reveal the existence of two intermediate phases in addition to the initial CoAl–Cl and final CoAl–NO3phases. Thein situdata indicate that one of these intermediates is a mixed nitrate- and chloride-based LDH phase, where the disorder decreases as the nitrate content increases. The XRPD data of the partial CoAl–CO3→ CoAl–SO4anion-exchange reaction show that the process is a two-phase transformation involving a sulfate-containing LDH with a 1H polytype structure.

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