Coating of TiO2 nanoparticles with PbS thin films and preparation of PbS nanoparticles using a one-pot sonochemical reaction under the multibubble sonoluminescence conditions

Syntheses of Cu2SnS3 and Cu2ZnSnS4 nanoparticles with tunable Zn/Sn ratios under multibubble sonoluminescence conditions

“…The estimated highest temperature and pressure in the liquid layer adjacent to the bubble were reported to be about 1000 °C and 500 bar. [19][20][21] Especially in the case of the multibubble sonoluminescence (MBSL) conditions in our study which are very powerful and efficient in comparison to other sonochemical reactions, the reaction mixture was typically sonicated at 20 kHz and a power of 220 W. By this process, various homogeneously coated materials at the nanoscale such as TiO 2 /ZnS, 22 TiO 2 /PbS, 23 and Cu/In 2 S 3 24 with a core/shell structure could be prepared in our previous research. Not only the coating process but also the nucleation of nanocrystals occurred in the ultrasonic field.…”

Synthesis of CdTe/TiO2 nanoparticles and their photocatalytic activity

“…For a typical sonochemical reaction under multibubble sonoluminescence (MBSL) conditions in this study, the hot-spots occur in clouds of acoustic cavitation bubbles have equivalent temperature of roughly 5000 K, pressure of about 1000 atmospheres, heating and cooling rates above 10 10 K/S [27,28]. The energy provided by the MBSL irradiation is high enough to permit access to a range of chemical reactions such as oxidation, reduction, dissolution and decomposition, which have been explored for producing novel materials with unusual properties [29][30][31][32][33]. By this process, homogeneous composite semiconductor such as CdS/TiO 2 , CdSe/TiO 2 with a core/shell structure in nano scale were prepared in our previous research.…”

Fabrication of PbS Nanoparticle-Sensitized TiO2 Nanotube Arrays and Their Photoelectrochemical Properties

“…Bulk PbS has a band gap of 0.42 eV, whereas PbS nanoparticles less than 5 nm in diameter have a band gap of 0.88 eV. 13,14 By controlling the size of the PbS nanoparticles the absorption wavelength of the first excition peak can be easily extended into the infrared. Further, with the TiO 2 NTA architecture enabling efficient spatial separation of the photogenerated charges, it is possible that suitable PbS nanoparticles could enhance TiO 2 photocatalytic activity because of multiple exciton generation.…”