Construction of WO3/Ti-doped WO3 bi-layer nanopore arrays with superior electrochromic and capacitive performances

Abstract

Crystalline WO 3 /Ti-doped WO 3 bi-layer nanopore arrays were constructed by the template synthesis of a WO 3 nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO 3 layer. The obtained bi-layer nanopore array shows a remarkable electrochromic performance with large dual-band optical modulation in both visible (VIS) and near infrared (NIR) regions (optical modulation of over 70% in the wavelength range from 600 to 1600 nm) and the fast response speed (coloring for 3.4 s and bleaching for 6.6 s). In addition, the bi-layer WO 3 /Ti-doped WO 3 nanopore array also present superior energy-storage properties (areal capacitance of 44.0 mF cm −2 and good rate capability), better than that of titanium-free thin films. The special bifunctional characteristics of electrochromism and pseudocapacitance can be ascribed to the large specific surface area provided by the architectural design, rich ion channels in the amorphous layer as well as proper titanium doping, which bestows the bi-layer nanopore array a great potential in clean energy applications.

Enhanced CO oxidation in porous metal-oxide nanoparticles derived from MOFs

“…HF). 26 Metal–organic frameworks (MOFs) are considered ideal materials for the preparation of porous metal oxides. This can be attributed to their extremely big specific surface areas, high porosity and controlled pore structures.…”

Electrodeposition of Ti-Doped Hierarchically Mesoporous Silica Microspheres/Tungsten Oxide Nanocrystallines Hybrid Films and Their Electrochromic Performance

“…Electrochromic materials that can reversibly change their optical properties such as transmittance [1], reflectance [2] and absorption [3] at the stimulation of a small electric field, have received significant interests owing to their potential applications in energy-saving smart windows [4][5][6], non-emissive information displays [7,8] and antiglare automotive mirrors [9]. It is recognized that the mechanism of the dynamic which changed optical properties of the electrochromic materials is mainly attributed to the electrochemically induced oxidation-reduction reaction [10,11]. Generally, materials containing variable valence elements can be used as electrochromic materials, including conducting polymers [12][13][14], organic small molecular [15,16] and inorganic metal oxides [17][18][19][20].…”