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Ag2S/CdS/TiO2 Nanotube Array Films with High Photocurrent Density by Spotting Sample Method.

Sun H, Zhao P, Zhang F, Liu Y, Hao J - Nanoscale Res Lett (2015)

Bottom Line: The X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectrum (XPS) results demonstrated that the Ag2S/CdS/TNTs prepared by SSM and other films were successfully prepared.The cycles of local deposition have great influence on their photoelectric properties.The photocurrent density of Ag2S/CdS/TNTs by SSM with optimum deposition cycles of 6 was about 37 times that of TNTs without modification, demonstrating their great prospective applications in solar energy utilization fields.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan, 250100, People's Republic of China.

ABSTRACT
Ag2S/CdS/TiO2 hybrid nanotube array films (Ag2S/CdS/TNTs) were prepared by selectively depositing a narrow-gap semiconductor-Ag2S (0.9 eV) quantum dots (QDs)-in the local domain of the CdS/TiO2 nanotube array films by spotting sample method (SSM). The improvement of sunlight absorption ability and photocurrent density of titanium dioxide (TiO2) nanotube array films (TNTs) which were obtained by anodic oxidation method was realized because of modifying semiconductor QDs. The CdS/TNTs, Ag2S/TNTs, and Ag2S/CdS/TNTs fabricated by uniformly depositing the QDs into the TNTs via the successive ionic layer adsorption and reaction (SILAR) method were synthesized, respectively. The X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectrum (XPS) results demonstrated that the Ag2S/CdS/TNTs prepared by SSM and other films were successfully prepared. In comparison with the four films of TNTs, CdS/TNTs, Ag2S/TNTs, and Ag2S/CdS/TNTs by SILAR, the Ag2S/CdS/TNTs prepared by SSM showed much better absorption capability and the highest photocurrent density in UV-vis range (320~800 nm). The cycles of local deposition have great influence on their photoelectric properties. The photocurrent density of Ag2S/CdS/TNTs by SSM with optimum deposition cycles of 6 was about 37 times that of TNTs without modification, demonstrating their great prospective applications in solar energy utilization fields.

No MeSH data available.


Related in: MedlinePlus

The composition and crystalline structures of the TNTs (a), CdS/TNTs (b), and Ag2S/CdS/TNTs (c) by SSM characterized using XRD and the XRD patterns (A for Ag2S, and C for CdS; solid circle for Ag2S, solid square for CdS, and solid triangle for TiO2)
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Fig4: The composition and crystalline structures of the TNTs (a), CdS/TNTs (b), and Ag2S/CdS/TNTs (c) by SSM characterized using XRD and the XRD patterns (A for Ag2S, and C for CdS; solid circle for Ag2S, solid square for CdS, and solid triangle for TiO2)

Mentions: The composition and crystalline structures of the TNTs, CdS/TNTs, and Ag2S/CdS/TNTs by SSM are also characterized using XRD, and the XRD patterns are shown in Fig. 4. Figure 4 (a) shows the characteristic diffraction peaks of anatase TiO2 (JCPDS file no. 71-1167). The diffraction peaks confirm that TiO2 nanotubes are anatase phase after thermal treatment at 450 °C for 2 h. The new weak peaks except the peaks of anatase TiO2 appearing in Fig. 4 (b) are CdS peaks (JCPD file no. 80-0019, marked by C), and these peaks reveal that the CdS particles have the cubic structure. As shown in Fig. 4 (c), all the diffraction peaks of Ag2S, CdS, and TiO2 are marked with solid circle, solid square, and solid triangle. The peaks of Ag2S attribute to acanthite (JCPDS file no. 14-0072, marked by A). The XRD patterns further confirm the HR-TEM, EDX, and elemental mapping results.Fig. 4


Ag2S/CdS/TiO2 Nanotube Array Films with High Photocurrent Density by Spotting Sample Method.

Sun H, Zhao P, Zhang F, Liu Y, Hao J - Nanoscale Res Lett (2015)

The composition and crystalline structures of the TNTs (a), CdS/TNTs (b), and Ag2S/CdS/TNTs (c) by SSM characterized using XRD and the XRD patterns (A for Ag2S, and C for CdS; solid circle for Ag2S, solid square for CdS, and solid triangle for TiO2)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4591224&req=5

Fig4: The composition and crystalline structures of the TNTs (a), CdS/TNTs (b), and Ag2S/CdS/TNTs (c) by SSM characterized using XRD and the XRD patterns (A for Ag2S, and C for CdS; solid circle for Ag2S, solid square for CdS, and solid triangle for TiO2)
Mentions: The composition and crystalline structures of the TNTs, CdS/TNTs, and Ag2S/CdS/TNTs by SSM are also characterized using XRD, and the XRD patterns are shown in Fig. 4. Figure 4 (a) shows the characteristic diffraction peaks of anatase TiO2 (JCPDS file no. 71-1167). The diffraction peaks confirm that TiO2 nanotubes are anatase phase after thermal treatment at 450 °C for 2 h. The new weak peaks except the peaks of anatase TiO2 appearing in Fig. 4 (b) are CdS peaks (JCPD file no. 80-0019, marked by C), and these peaks reveal that the CdS particles have the cubic structure. As shown in Fig. 4 (c), all the diffraction peaks of Ag2S, CdS, and TiO2 are marked with solid circle, solid square, and solid triangle. The peaks of Ag2S attribute to acanthite (JCPDS file no. 14-0072, marked by A). The XRD patterns further confirm the HR-TEM, EDX, and elemental mapping results.Fig. 4

Bottom Line: The X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectrum (XPS) results demonstrated that the Ag2S/CdS/TNTs prepared by SSM and other films were successfully prepared.The cycles of local deposition have great influence on their photoelectric properties.The photocurrent density of Ag2S/CdS/TNTs by SSM with optimum deposition cycles of 6 was about 37 times that of TNTs without modification, demonstrating their great prospective applications in solar energy utilization fields.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan, 250100, People's Republic of China.

ABSTRACT
Ag2S/CdS/TiO2 hybrid nanotube array films (Ag2S/CdS/TNTs) were prepared by selectively depositing a narrow-gap semiconductor-Ag2S (0.9 eV) quantum dots (QDs)-in the local domain of the CdS/TiO2 nanotube array films by spotting sample method (SSM). The improvement of sunlight absorption ability and photocurrent density of titanium dioxide (TiO2) nanotube array films (TNTs) which were obtained by anodic oxidation method was realized because of modifying semiconductor QDs. The CdS/TNTs, Ag2S/TNTs, and Ag2S/CdS/TNTs fabricated by uniformly depositing the QDs into the TNTs via the successive ionic layer adsorption and reaction (SILAR) method were synthesized, respectively. The X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectrum (XPS) results demonstrated that the Ag2S/CdS/TNTs prepared by SSM and other films were successfully prepared. In comparison with the four films of TNTs, CdS/TNTs, Ag2S/TNTs, and Ag2S/CdS/TNTs by SILAR, the Ag2S/CdS/TNTs prepared by SSM showed much better absorption capability and the highest photocurrent density in UV-vis range (320~800 nm). The cycles of local deposition have great influence on their photoelectric properties. The photocurrent density of Ag2S/CdS/TNTs by SSM with optimum deposition cycles of 6 was about 37 times that of TNTs without modification, demonstrating their great prospective applications in solar energy utilization fields.

No MeSH data available.


Related in: MedlinePlus