SnO₂ Quantum Dots Synthesized with a Carrier Solvent Assisted Interfacial Reaction for Band-Structure Engineering of TiO₂ Photocatalysts

Abstract

A simple, fast, room temperature, surfactant-free, carrier solvent assisted interfacial reaction method is developed for size-controllable syntheses of SnO 2 quantum dots (QD). Narrowly size-ranged SnO 2 QDs with average diameters of 2−2.7 nm, corresponding to energy band gaps of 5.7−4.39 eV, are produced at room temperature within 30 min through precursor concentration adjustment. These SnO 2 QDs, when decorated onto the surfaces of TiO 2 nanoparticles, enable precise engineering of the band structure of the TiO 2 nanoparticles. The band structure of the SnO 2 QD decorated TiO 2 nanoparticles can be controlled to achieve not only enhanced charge separation but also generation of extra oxidizing species, peroxy radicals, both beneficial for boosting the photocatalytic performances of the TiO 2 nanoparticles. The photocatalytic degradation efficiency of TiO 2 toward Rhodamine B, in terms of the apparent reaction rate constant, is significantly improved from 0.025 to 0.055 min −1 with the band structure engineering achieved through SnO 2 QD decoration.

SnFe2O4 Nanocrystals as Highly Efficient Catalysts for Hydrogen‐Peroxide Sensing

“…Preparation of SnFe 2 O 4 nanocrystals SnFe 2 O 4 NCs were prepared with as imple one-step carrier solvent assisted interfacial reaction process, following the procedures in our previous work with minor modifications. [41] Briefly,s toichiometric amounts of SnCl 2 (Alfa Aesar,9 8%)a nd Fe(NO 3 ) 3 ·9H 2 O( J. T. Baker,9 8%)w ere dissolved in ethanol (Sigma-Aldrich, 99 %) sequentially to form the precursor solution. The precursor solution was added into chloroform of equal volume (Sigma-Aldrich, 99 %).…”

Gold nanoparticle and carbon dot coated SnO2 nanocomposite with high photo-electronic catalytic activity for oxygen evolution reaction

“…23 The method is described as follows: first, 0.12 g SnCl 4 ·5H 2 O was dissolved in 20 mL ethanol. Then 20 mL chloroform was added.…”

CuO nanorods from carrier solvent assisted interfacial reaction processes: An unexpected extraordinary Fe-free photocatalyst in sunlight assisted Fenton-like processes

“…CuO nanorods were prepared with a one-step carrier solvent assisted interfacial reaction process [11,31,32] . First, desired amounts of CuCl 2 (Alfa Aesar, 98%) was dissolved in ethanol (Sigma-Aldrich, 99%) to serve as the precursor solution.…”