One-Pot Synthesis of Hollow PbSe Single-Crystalline Nanoboxes via Gas Bubble Assisted Ostwald Ripening

Abstract

We report a simple one-pot route to fabricate PbSe hollow single-crystalline nanoboxes with the presence of trioctylphosphine as the structure-directing agent and stabilizer. Various controlling parameters were examined, such as trioctylphosphine amounts, reaction temperature, reaction time, and lead(II) precursors. On the basis of the experimental results, the gas bubbles assisted Ostwald ripening process was proposed to explain the formation of hollow PbSe nanoboxes. The morphology and composition of the products were characterized by X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy.

TOP as ligand and solvent to synthesize silver telluride nanosheets

“…We tentatively attribute the formation of irregularly shaped nanoparticles to faster nucleation and growth rates under high reaction temperatures, similar to the recent reports on formations of PbSe hollow nanoboxes and CdS nanorods. [24,25] Another important factor that controls the morphology Ag 2 Te nanocrystals is the molar ratio of AgNO 3 to tellurium powder. In our experiments, the molar ratios of 2:1, 1:2, and 1:5 were tested by changing the amount of tellurium powder in reactants while keeping those of AgNO 3 and TOP fixed at 51.5 mg and 8 mL, respectively.…”

A visible light induced photoelectrochemical aptsensor constructed by aligned ZnO@CdTe core shell nanocable arrays/carboxylated g-C3N4 for the detection of Proprotein convertase subtilisin/kexin type 6 gene

“…To increase the light-harvesting efficiency, various semiconductor nanocrystals have been adopted to sensitize ZnO, including CdS (Fan et al 2014;Maity et al 2015;Robel et al 2006;, CdSe Jiang and Ju 2007;Jie et al 2011;Josell et al 2014;Robel et al 2006;Zou and Ju 2004), CdTe (Cheng et al 2010;Eley et al 2014;Fan et al 2014;Li et al 2005;, PbS (Eita et al 2015;Karki et al 2014;Zheng et al 2014), PbSe (Chen et al 1998;Oh et al 2014;Schornbaum et al 2014;Zhu et al 2000), InP (Kim et al 2015;Zaban et al 1998) and InAs (Ni et al 2011;Wang et al 2013;Wang et al 2014). Among the most widely used inorganic semiconductor sensitizers, CdTe has a high optical absorption coefficient (10 -4 cm -1 ) and narrow band gap of about 1.5 eV at room temperature and match the preferred range of the radiation spectrum (Cao et al 2007;Shokhovets et al 2007).…”

Surfactant-free synthesis of Cu2O hollow spheres and their wavelength-dependent visible photocatalytic activities using LED lamps as cold light sources

“…Various morphologies, such as nanowires [ 1 ], nanocubes [ 2 ], nanocages [ 3 ], and octahedrons [ 4 ], have been synthesized for their interesting properties and applications. Among these nanostructures, hollow nanostructures are of particular interest because of their unique electrical, magnetic, thermal, and optical properties [ 5 - 13 ]. Hollow nanomaterials are widely used as nanoscale chemical reactors [ 14 ], high-performance catalysts [ 14 - 16 ], drug-delivery carriers [ 17 , 18 ], lithium-ion battery materials [ 19 ], and wavelength optical components for biomedical applications [ 20 ].…”