Growth, microstructure, structural and optical properties of PVP-capped CdS nanoflowers for efficient photocatalytic activity of Rhodamine B

Journal Article · Sun Oct 15 04:00:00 EDT 2017 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.05.059· OSTI ID:22730415

Ganesh, R. Sankar ^[1]; Durgadevi, E.; Navaneethan, M. ^[2]; Muthamizhchelvan, C. ^[1]; Hayakawa, Y. ^[2]; Kim, Deuk Young ^[3]

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1. Center for Materials Science and Nano Devices, Department of Nanotechnology, SRM University, Kattankulathur, Kancheepuram 603203, Tamil Nadu (India)
2. Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8011 (Japan)
3. Department of Semiconductor Science, Dongguk University-Seoul, Jung-gu, Seoul 04620 (Korea, Republic of)

Highlights: • Synthesis of un-capped and PVP-capped CdS microstructures by Hydrothermal. • Growth of both the flower and dendrite microstructures controlled by the growth time. • Phase transition of CdS from cubic zinc blend to hexagonal by the growth time. • CdS flowers enhanced the photocatalytic performance of RhB under visible light. • PVP-capped CdS showed the highest degradation of 95% of RhB within 120 min. - Abstract: Size and structure tunability of polyvinyl pyrolidone (PVP) capped cadmium sulfide (PVP-capped CdS) flowers were synthesized by controlling the reaction time. XRD pattern indicated a phase transition from the cubic zinc blend to the hexagonal phase of CdS powder as the reaction time increased. As per the microstructure analysis with respect to the reaction time, the spherical nanoparticles were transformed in to the flower like morphology consisting of sword like nanorods and confirmed by the bright field images of TEM, while, HR-TEM images showed the uniform lattice spacing. UV-spectra exhibited a red shift due to the excitations of CdS nanoparticles. The near band edge (NBE) peak of PVP-capped CdS was completely diminished which indicated to sulphur vacancies on the surface of flowers. The photocatalytic activity of PVP-capped CdS flowers was detected the fast degradation of Rhodamine B (RhB) dye (95% for 120 min) by irradiation of visible light.

• OSTI ID: 22730415
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 94; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM SULFIDES
CHEMICAL BONDS
CRYSTAL GROWTH
MICROSTRUCTURE
NANOSTRUCTURES
OPTICAL PROPERTIES
PHASE TRANSFORMATIONS
PHOTOCATALYSIS
RED SHIFT
RHODAMINES
SYNTHESIS
ULTRAVIOLET SPECTRA
X-RAY DIFFRACTION