Details

Autor(en) / Beteiligte

• Wang, Lianqiang
• Wang, Yanzhe
• Tian, Hongwei
• Qiao, Liang
• Zeng, Yi

Titel

Enhanced ammonia detection using wrinkled porous CoFe2O4 double-shelled spheres prepared by a thermally driven contraction process

Ist Teil von

• Sensors and actuators. B, Chemical, 2020-07, Vol.314, p.128085, Article 128085

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• [Display omitted] •Rational assembly of wrinkled porous CoFe2O4 double-shelled spheres with ultrathin primary nanoparticles.•Unceasing loss of organic components maintained a highly wrinkled and porous double-shelled surfaces.•Activated double layers with less-agglomerated configuration promoted ammonia sensing characteristics. Hierarchical CoFe2O4 double-shelled hollow spheres (DHSs) with wrinkled porous surfaces are successfully synthesized via a self-templating strategy followed by a simple post-annealing process. The crystallinity, morphology, and microstructure of CoFe2O4 DHSs are detailedly characterized. The as-prepared CoFe2O4 DHSs are composed of homogeneous primary nanoparticles with uniform size and morphology that are hierarchically assembled into well-defined double-shelled spheres with high porosity. The formation mechanism of double-shelled hollow structure is also discussed. Because of their large specific surface area and easily penetrable hierarchical shells, the as-synthesized CoFe2O4 DHSs exhibit high sensitivity to ammonia and fast response-recovery capability at the optimal working temperature.