5 research outputs found
Improvement in exercise capacity after inspiratory muscle training does not correspond to an immune response in chronic heart failure patients
Improvement in exercise capacity after inspiratory muscle training does not correspond to an immune response in chronic heart failure patients
Self-Assembly Template Driven 3D Inverse Opal Microspheres Functionalized with Catalyst Nanoparticles Enabling a Highly Efficient Chemical Sensing Platform
The design of semiconductor
metal oxides (SMOs) with well-ordered porous structure has attracted
tremendous attention owing to their larger specific surface area.
Herein, three-dimensional inverse opal In<sub>2</sub>O<sub>3</sub> microspheres (3D-IO In<sub>2</sub>O<sub>3</sub> MSs) were fabricated
through one-step ultrasonic spray pyrolysis (USP) which employed self-assembly
sulfonated polystyrene (S-PS) spheres as a sacrificial template. The
spherical pores observed in the 3D-IO In<sub>2</sub>O<sub>3</sub> MSs
had diameters of about 4 and 80 nm. Subsequently, the catalytic palladium
oxide nanoparticles (PdO NPs) were loaded on 3D-IO In<sub>2</sub>O<sub>3</sub> MSs via a simple impregnation method, and their gas sensing
properties were investigated. In a comparison with pristine 3D-IO
In<sub>2</sub>O<sub>3</sub> MSs, the 3D-IO PdO@In<sub>2</sub>O<sub>3</sub> MSs exhibited a 3.9 times higher response (<i>R</i><sub>air</sub>/<i>R</i><sub>gas</sub> = 50.9) to 100 ppm
acetone at 250 °C and a good acetone selectivity. The detection
limit for acetone could extend down to ppb level. Furthermore, the
3D-IO PdO@In<sub>2</sub>O<sub>3</sub> MSs-based sensor also possess
good long-term stability. The extraordinary sensing performance can
be attributed to the novel 3D periodic porous structure, highly three-dimensional
interconnection, larger specific surface area, size-tunable (meso-
and macroscale) bimodal pores, and PdO NP catalysts