Synthesis of CdTe/TiO2 nanoparticles and their photocatalytic activity

Li, Deliang; Wang, Shijun; Wang, Jing; Zhang, Xiaodan; Liu, Shanhu

doi:10.1016/j.materresbull.2013.06.052

Cited by 39 publications

(15 citation statements)

References 36 publications

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“…This photocatalytic efficiency of RhB for CdTeSe@TNTs is also higher than CdSe/TiO 2 nanorods [25] and CdTe/TiO 2 [26], demonstrating the advantage of the ternary QDs.…”

Section: Photocatalytic Activity and Mechanism Of Cdtese@tntsmentioning

confidence: 82%

“…8a, the photocatalytic degradation efficiency decreases with the increase of the initial concentration of RhB. This could be ascribed to the limit of the active oxygen species when the initial concentration of RhB is increased [26]. The photocatalytic degradation efficiency can still reach 73% at 20 M initial dye concentration.…”

Section: Photocatalytic Activity and Mechanism Of Cdtese@tntsmentioning

confidence: 94%

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In situ synthesis and visible-light photocatalytic application of CdTeSe@TiO2 nanotube composites with high electron transfer rate

Han

Ren

Luo

et al. 2016

Journal of Molecular Catalysis A: Chemical

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High quality ternary-alloyed CdTeSe quantum dots (QDs) have been synthesized via a simple one-pot approach in aqueous phase. CdTeSe QDs show an average size of 3.0 nm with good crystallinity, excellent monodispersity and relatively narrow size distribution. TiO 2 nanotubes (TNTs) were prepared by hydrothermal method with larger specific surface area (364.2 m 2 •g-1), and CdTeSe@TNTs were synthesized by in situ process. The absorption edge of CdTeSe@TNTs is red shifted significantly toward 697 nm. After sensitized with CdTeSe, the photoluminescence (PL) emission of CdTeSe@TNTs is significantly quenched, and the fluorescence lifetime of the composites is drastically decayed from 105.82 ns to 0.13 ns with a high photoinduced electron transfer rate (k et = 7.98×10 9 s-1) because of their high matchable lattice constant. In addition, under visible-light irradiation, the photocatalytic efficiency of rhodamine B (RhB) with CdTeSe@TNTs reaches 90% for 80 min. And the photocatalytic reaction rate constant for CdTeSe@TNTs is 0.0272 min-1 , which is 5.4 and 3.4 times larger than that of pure TNTs and CdTeSe QDs, respectively. It is due to the broad visible absorption of CdTeSe@TNTs and the faster photoinduced electron transfer from CdTeSe QDs to TNTs.

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“…This photocatalytic efficiency of RhB for CdTeSe@TNTs is also higher than CdSe/TiO 2 nanorods [25] and CdTe/TiO 2 [26], demonstrating the advantage of the ternary QDs.…”

Section: Photocatalytic Activity and Mechanism Of Cdtese@tntsmentioning

confidence: 82%

Section: Photocatalytic Activity and Mechanism Of Cdtese@tntsmentioning

confidence: 94%

In situ synthesis and visible-light photocatalytic application of CdTeSe@TiO2 nanotube composites with high electron transfer rate

Han

Ren

Luo

et al. 2016

Journal of Molecular Catalysis A: Chemical

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“…[16][17][18][19] QDs can utilize a higher density of absorbed photons due to the exciting possibility of achieving multiple exciton generation (MEG). [20][21][22][23][24] CdTe QDs are a prominent example of efficient photoactive systems due to their broader light absorption prole, easily tunable size, and multiple exciton generation. [25][26][27][28][29][30][31] Photocatalysis and photovoltaic technologies using CdTe as a key material are growing rapidly towards more advanced applications, and CdTe now represents the second most utilized solar cell material in the world aer silicon.…”

Section: Introductionmentioning

confidence: 99%

“…[52][53][54][55][56] Nanocomposites of QDs with MOFs have been suggested with improved charge transfer mechanisms, lower recombination losses, and more efficient harvesting of light. 20,21,[57][58][59] The stacking of hundreds to thousands of QD particles on an MOF surface can provide a large optical cross section area and improve light harvesting properties. 21 The distribution/immobilization of QDs over the surface of an MOF should also help regenerate the material when used as a photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Efficient photocatalytic and photovoltaic applications with nanocomposites between CdTe QDs and an NTU-9 MOF

et al. 2017

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“…In order to solve the mentioned problems, the photoresponse of TiO 2 can be shifted to the visible region via coupling narrow band gap semiconductors such as CdSe (16) (17) (18) (19), CdS (20) (21) and CdTe (22) (23). Moreover, nanostructured metal chalcogenides such as CdTe (23), CdSe (24), CdS (25), PbS (26), Ag 2 S (27), ZnS (28), and co-sensitized CdS/CdSe (29) (30) have attracted significant interest due to their applications in electronics, semiconductor and optical devices. CdS is confirmed to be a good sensitizer because its favorable band gap to absorb more light in order to improve optical properties of TiO 2 .…”

mentioning

confidence: 99%

Enhanced Photocurrent of Titania Nanotube Photoelectrode Decorated with CdS Nanoparticles

Ayal¹

2018

Baghdad Sci.J

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In this work, CdS/TiO2 nanotubes composite nanofilms were successfully synthesized via electrodeposition technique. TiO2 titania nanotube arrays (NTAs) are commonly used in photoelectrochemical cells as the photoelectrode due to their high surface area, excellent charge transfer between interfaces and fewer interfacial grain boundaries. The anodization technique of titanium foil was used to prepare TiO2 NTAs photoelectrode. The concentration of CdCl2 played an important role in the formation of CdS nanoparticles. Field emission scanning electron microscopy (FESEM) shows that the CdS nanoparticles were well deposited onto the outer and inner of nanotube at 40 mM of CdCl2. X-ray diffraction (XRD) and energy dispersive X-ray (EDX) analyses were executed for the determination of the composition and crystalline structure of the synthesized samples. Furthermore, the data of EDX confirms the formation of titanium and oxygen for TiO2 nanotubes and cadmium and sulfide for CdS deposits. UV–visible diffuse reflectance spectroscopy (UV-DRS) displayed that CdS nanoparticle which deposited onto TiO2 NTAs causes a red-shift into the visible region. CdS/TiO2 NTAs sample prepared at 40 mM of CdCl2 showed maximum photocurrent of 1.745 mA cm-2 while the bare TiO2 NTAs showed 0.026 mA cm-1.

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Synthesis of CdTe/TiO2 nanoparticles and their photocatalytic activity

Cited by 39 publications

References 36 publications

In situ synthesis and visible-light photocatalytic application of CdTeSe@TiO2 nanotube composites with high electron transfer rate

In situ synthesis and visible-light photocatalytic application of CdTeSe@TiO2 nanotube composites with high electron transfer rate

Efficient photocatalytic and photovoltaic applications with nanocomposites between CdTe QDs and an NTU-9 MOF

Enhanced Photocurrent of Titania Nanotube Photoelectrode Decorated with CdS Nanoparticles

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