Universal Oxide Shell Growth Enables in Situ Structural Studies of Perovskite Nanocrystals during the Anion Exchange Reaction

2019 ◽  
Author(s):  
Anna Loiudice ◽  
Michal Strach ◽  
Seryio Saris ◽  
Dmitry Chernyshov ◽  
Raffaella Buonsanti
Keyword(s):  
Exchange Reaction ◽  
Anion Exchange ◽  
Shell Growth ◽  
Oxide Shell ◽  
Structural Studies ◽  
Perovskite Nanocrystals ◽  
Anion Exchange Reaction

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.

In situ anion exchange synthesis of In2S3/In(OH)3 heterostructures for efficient photocatalytic degradation of MO under solar light

2017 ◽  
Vol 41 (8) ◽  
pp. 3134-3142 ◽  
Author(s):  
Zheng Qiao ◽  
Tingjiang Yan ◽  
Wenjuan Li ◽  
Baibiao Huang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Hydrothermal Process ◽  
Solar Light ◽  
Excellent Photocatalytic Activity ◽  
Anion Exchange Reaction

In2S3/In(OH)3 heterostructures which were synthesized via an in situ anion exchange reaction and the hydrothermal process displayed excellent photocatalytic activity compared to pure components and the reported In2S3/In2O3.

Generation of cesium lead halide perovskite nanocrystals via a serially-integrated microreactor system: Sequential anion exchange reaction

2020 ◽  
Vol 384 ◽  
pp. 123316
Author(s):  
Sung-Min Kang ◽  
Bumjun Park ◽  
Ganji Seeta Rama Raju ◽  
Seungmin Baek ◽  
Sk. Khaja Hussain ◽  
...  
Keyword(s):  
Exchange Reaction ◽  
Anion Exchange ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Anion Exchange Reaction

scholarly journals Facile anion-exchange reaction in mixed-cation lead bromide perovskite nanocrystals

RSC Advances ◽  
2019 ◽  
Vol 9 (23) ◽  
pp. 13263-13268
Author(s):  
Ambra Pisanu ◽  
Paolo Quadrelli ◽  
Lorenzo Malavasi
Keyword(s):  
Exchange Reaction ◽  
Anion Exchange ◽  
Perovskite Nanocrystals ◽  
Mixed Cation ◽  
Lead Bromide ◽  
Anion Exchange Reaction

The present paper reports a facile and fast anion exchange reaction approach for perovskite nanocrystals (NCs).

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