Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior
Nanoparticles of CdS have been stabilized in aqueous medium by surface capping with 6- dimethylaminopurine at pH 11.0 in the presence of excess Cd2+. The nucleation of the cluster is controlled through coordination of 6-dimethylaminopurine via. -N(CH3)2 group. Excess 6-dimethylaminopurine binds to t...
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| Format: | Article |
| Language: | English |
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Wiley
2004-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X04000091 |
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| author | Anil Kumar Shipra Mital |
| author_facet | Anil Kumar Shipra Mital |
| author_sort | Anil Kumar |
| collection | DOAJ |
| description | Nanoparticles of CdS have been stabilized in aqueous medium by surface capping with 6-
dimethylaminopurine at pH 11.0 in the presence of excess Cd2+. The nucleation of the cluster is controlled
through coordination of 6-dimethylaminopurine via. -N(CH3)2 group. Excess 6-dimethylaminopurine binds
to the core structure through H-bonding involving protonated N(9). CdS capped with 6-dimethylaminopurine
produced relatively small sized particles (2 nm) having a narrow size distribution. These particles did not
exhibit any Ostwald's ripening and its solid sample could be fully redispersed in aqueous medium. Thermolysis
results in the growth of these particles but demonstrates a better photocatalytic activity. Relaxation
kinetics reveals the surface to contain a large number of surface states and the emission is originated by the
presence of sulfur vacancies on the particle. The addition of indole simply quenches the emission of CdS in
a bimolecular collisional process at a diffusion-controlled rate of about 9×109dm3mol−1s−1. Irradiation of the reaction mixture containing CdS and indole by light of λ>360 nm results in the formation of indigo
with a quantum efficiency of 0.1. |
| format | Article |
| id | doaj-art-0c41ef130e8b4270a1933d3a4644f3ff |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2004-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-0c41ef130e8b4270a1933d3a4644f3ff2025-02-03T06:44:42ZengWileyInternational Journal of Photoenergy1110-662X2004-01-0162616810.1155/S1110662X04000091Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behaviorAnil Kumar0Shipra Mital1Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaDepartment of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaNanoparticles of CdS have been stabilized in aqueous medium by surface capping with 6- dimethylaminopurine at pH 11.0 in the presence of excess Cd2+. The nucleation of the cluster is controlled through coordination of 6-dimethylaminopurine via. -N(CH3)2 group. Excess 6-dimethylaminopurine binds to the core structure through H-bonding involving protonated N(9). CdS capped with 6-dimethylaminopurine produced relatively small sized particles (2 nm) having a narrow size distribution. These particles did not exhibit any Ostwald's ripening and its solid sample could be fully redispersed in aqueous medium. Thermolysis results in the growth of these particles but demonstrates a better photocatalytic activity. Relaxation kinetics reveals the surface to contain a large number of surface states and the emission is originated by the presence of sulfur vacancies on the particle. The addition of indole simply quenches the emission of CdS in a bimolecular collisional process at a diffusion-controlled rate of about 9×109dm3mol−1s−1. Irradiation of the reaction mixture containing CdS and indole by light of λ>360 nm results in the formation of indigo with a quantum efficiency of 0.1.http://dx.doi.org/10.1155/S1110662X04000091 |
| spellingShingle | Anil Kumar Shipra Mital Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior International Journal of Photoenergy |
| title | Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior |
| title_full | Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior |
| title_fullStr | Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior |
| title_full_unstemmed | Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior |
| title_short | Synthesis and photophysics of 6-dimethylaminopurine-capped Q-CdS nanoparticles—a study of its photocatalytic behavior |
| title_sort | synthesis and photophysics of 6 dimethylaminopurine capped q cds nanoparticles a study of its photocatalytic behavior |
| url | http://dx.doi.org/10.1155/S1110662X04000091 |
| work_keys_str_mv | AT anilkumar synthesisandphotophysicsof6dimethylaminopurinecappedqcdsnanoparticlesastudyofitsphotocatalyticbehavior AT shipramital synthesisandphotophysicsof6dimethylaminopurinecappedqcdsnanoparticlesastudyofitsphotocatalyticbehavior |