- Post-synthetic halide conversion and selective halogen capture in hybrid perovskites CHEMICAL SCIENCE 2015; 6 (7): 4054-4059
- A Layered Hybrid Perovskite Solar-Cell Absorber with Enhanced Moisture Stability ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2014; 53 (42): 11232-11235
Interconversion of Inverse Opals of Electrically Conducting Doped Titanium Oxides and Nitrides
2012; 8 (18): 2824-2832
There is a need for conducting, porous, and chemically stable materials for technologies including, but not limited to, fuel cells, solar cells, and batteries. The need for catalyst support materials that are more durable than carbon black in fuel cells motivated previous studies of the synthesis, characterization, and corrosion resistance of Ti(0.7) W(0.3) O(2) nanoparticles. However, because even higher porosity and increased electrical conductivity are desired, processes were developed to prepare rutile phase Ti(0.7) W(0.3) O(2) and cubic Ti(0.7) W(0.3) N in inverse opal morphologies from a precursor inverse opal of very poorly conducting, amorphous Ti(0.7) W(0.3) O(2.3) . Inverse opals have been explored for a variety of applications from catalysis to photonics, and inverse opals of both oxides and nitrides have been reported. By synthesizing highly conducting mixed-metal oxides and mixed-metal nitrides, the applications of inverse opals can be broadened. Herein, the synthesis and characterization of polystyrene-templated, single-phase, crystalline inverse opals of Ti(0.7) W(0.3) O(2) are reported. These conducting inverse opals can subsequently be converted to inverse opals of Ti(0.7) W(0.3) N and then fully oxidized back to inverse opals of the original insulating, amorphous Ti(0.7) W(0.3) O(2.3) . Such changes in composition and crystal structure, while successfully retaining the inverse opal morphology without the use of a supporting template during the conversion, have not been previously reported.
View details for DOI 10.1002/smll.201200502
View details for Web of Science ID 000308874900007
View details for PubMedID 22807307