Nanocadmium sulphide (CdS) has been prepared by the one-pot solid-state method from cadmium chloride (CdCl₂) and sodium sulphide (Na₂S) without any capping agent. The grinding period plays a major role in transforming CdS from the cubic (zinc blende) to the hexagonal (wurtzite) phase, hitherto unreported at the lowest temperature of 200°C by the solid-state approach. The compounds are characterised by powder X-ray diffraction, UV–visible absorption spectroscopy, scanning electron microscopy and high resolution transmission electron microscopy techniques. On the basis of the results, it has been observed that with only grinding and without subsequent heat treatment, the compounds named with their grinding period as subscript have either zinc blende – CdS_{(30 min)} or mixed zinc blende/wurtzite – CdS_{(2,4, 6 and 8 h)} structures. However, when subjected to heat treatment at 200°C, there is a complete phase transformation to the wurtzite structure achieved only with the CdS_{(8 h)} compound, while the rest of the compounds show similar phases as the compounds prepared without annealing. The photocatalytic efficiency of CdS compounds on methyl orange follows the order, CdS_(cubic) > CdS_{(mixed phase → cubic + hexagonal)} > CdS_(hexagonal), with cubic phase CdS showing greater efficiency than mixed and hexagonal phases.

References

1. 1)
  - 3. Baykul, M.C., Orhan, N.: ‘Band alignment of cd(1–x)ZnxS produced by spray pyrolysis method’, Thin Solid Films, 2010, 518, pp. 1925–1928 (doi: 10.1016/j.tsf.2009.07.142).
2. 2)
  - 4. Wang, C., Shang, H., Tao, Y., Yuan, T., Zhang, G.: ‘Properties and morphology of CdS compounded TiO2 visible light photocatalytic nanofilms coated on glass surface’, Purif. Technol., 2003, 32, pp. 357–362 (doi: 10.1016/S1383-5866(03)00058-3).
3. 3)
  - 37. Sebastian, M.T., Pandey, D., Krishna, P.: ‘X-ray diffraction study of the 2 h to 3c solid state transformation in vapour grown single crystals of ZnS’, Phys. Status Solidi A, 1982, 71, pp. 633–640 (doi: 10.1002/pssa.2210710241).
4. 4)
  - M. Bruchez , M. Moronne , P. Gin , S. Weiss , A.P. Alivisatos . Semiconductor nanocrystals as fluorescent biological labels. Science , 5385 , 2013 - 2016
5. 5)
  - 26. Jakimavicious, J., Alisauskas, A., Sirvaitis, A.: ‘Microstructure of inserted cadmium sulphide layers’, Chem. Abstr., 1972, 76, pp. 38400–38400.
6. 6)
  - 24. Tsuzuki, T., McCormick, P.G.: ‘Synthesis of CdS quantum dots by mechanochemical reaction’, Appl. Phys. A, Mater. Sci. Process., 1997, 65, pp. 607–609 (doi: 10.1007/s003390050629).
7. 7)
  - 34. Zhang, H., Huang, F., Gilbert, B., Banfield, J.F.: ‘Molecular dynamics simulations, thermodynamic analysis, and experimental study of phase stability of zinc sulfide nanoparticles’, J. Phys. Chem. B, 2003, 107, pp. 13051–13060 (doi: 10.1021/jp036108t).
8. 8)
  - G.F. Lin , J.W. Zheng , R. Xu . Template-free synthesis of uniform CdS hollow nanospheres and their photocatalytic activities. J. Phys. Chem. C , 7363 - 7370
9. 9)
  - 1. Venkateswaran, U., Chandrasekhar, M.: ‘Luminescence and Raman spectra of CdS under hydrostatic pressure’, Phys. Rev. B, 1984, 30, pp. 3316–3319 (doi: 10.1103/PhysRevB.30.3316).
10. 10)
  - 8. Rath, A.K., Bhaumik, S., Pal, A.J.: ‘Mn-doped nanocrystals in light-emitting diodes: energy-transfer to obtain electroluminescence from quantum dots’, Appl. Phys. Lett., 2010, 97, pp. 113502–11503 (doi: 10.1063/1.3489099).
11. 11)
  - 20. Abdolahzadeh Ziabari, A., Ghodsi, F.E.: ‘Growth, characterization and studying of sol–gel derived CdS nanoscrystalline thin films incorporated in polyethyleneglycol: effects of post-heat treatment’, Sol. Energy Mater. Sol. Cells, 2012, 105, pp. 249–262 (doi: 10.1016/j.solmat.2012.05.014).
12. 12)
  - 36. Banerjee, R., Jayakrishnan, R., Ayyub, P.: ‘Effect of the size-induced structural transformation on the band gap in CdS nanoparticles’, J. Phys. Condens. Matter., 2000, 12, pp. 10647–10654 (doi: 10.1088/0953-8984/12/50/325).
13. 13)
  - 22. Zelaya-Angel, O., Alvarado-Gil, J.J., Lozada-Morales, R., Vargas, H., Ferreira Da Silva, A.: ‘Band-gap shift in CdS semiconductor by photoacoustic spectroscopy: evidence of a cubic to hexagonal lattice transition’, Appl. Phys. Lett., 1994, 64, pp. 291–293 (doi: 10.1063/1.111184).
14. 14)
  - 14. Biswas, S., Hossain, M.F., Takahashi, T.: ‘Fabrication of Grätzel solar cell with TiO2/CdS bilayered photoelectrode’, Thin Solid Films, 2008, 517, pp. 1284–1288 (doi: 10.1016/j.tsf.2008.06.010).
15. 15)
  - 23. Gonzalez, J., Santiago-Jacinto, P., Reguera, E.: ‘Controlled growth of CdS quantum dots’, Sci. Adv. Mater., 2009, 1, pp. 69–76 (doi: 10.1166/sam.2009.1010).
16. 16)
  - 17. Song, C., Zhang, Y., Jiang, L., Wang, D.: ‘Morphology-controlled synthesis of CdS nanostructures and their optical properties’, Sci. Adv. Mater., 2012, 4, pp. 1096–1102 (doi: 10.1166/sam.2012.1396).
17. 17)
  - 16. Khallaf, H., Chai, G., Lupan, O., Chow, L., Park, S., Schulte, A.: ‘Characterization of gallium-doped CdS thin films grown by chemical bath deposition’, Appl. Surf. Sci., 2009, 255, pp. 4129–4134 (doi: 10.1016/j.apsusc.2008.10.115).
18. 18)
  - 19. Bao, N., Shen, L., Takata, T., et al: ‘Facile cd – thiourea complex thermolysis synthesis of phase-controlled CdS nanocrystals for photocatalytic hydrogen production under visible light’, J. Phys. Chem. C, 2007, 47, pp. 17527–17534 (doi: 10.1021/jp076566s).
19. 19)
  - 12. Kanade, K.G., Baeg, J., Mulik, U.P., Amalnerkar, D.P., Kale, B.B.: ‘Nano-CdS by polymer-inorganic solid-state reaction: visible light pristine photocatalyst for hydrogen generation’, Mater. Res. Bull., 2006, 41, pp. 2219–2225 (doi: 10.1016/j.materresbull.2006.04.031).
20. 20)
  - 9. Wei, T., Huang, C., Hansen, B.J., et al: ‘Large enhancement in photon detection sensitivity via Schottky-gated CdS nanowire nanosensors’, Appl. Phys. Lett., 2010, 96, pp. 13508/1–13508/3.
21. 21)
  - 31. Haque, S.E., Ramdas, B., Sheela, A.: ‘Preparation and photocatalytic study of nano cadmium sulphide’, Adv. Mater. Res., 2012, 584, pp. 406–410 (doi: 10.4028/www.scientific.net/AMR.584.406).
22. 22)
  - 11. Shen, S., Guo, L.: ‘Growth of quantum-confined CdS nanoparticles inside Ti-MCM-41 as a visible light photocatalyst’, J. Mater. Res. Bull., 2008, 43, pp. 437–466 (doi: 10.1016/j.materresbull.2007.02.034).
23. 23)
  - 10. Cao, C., Hu, C., Shen, W., Wang, S., Tian, Y., Wang, X.: ‘Synthesis and characterization of TiO2/CdS core–shell nanorod arrays and their photoelectrochemical property’, J. Alloys Compd., 2012, 523, pp. 139–145 (doi: 10.1016/j.jallcom.2012.01.126).
24. 24)
  - 6. Jing, D., Guo, L.: ‘A novel method for the preparation of a highly stable and active CdS photocatalyst with a special surface nanostructure’, J. Phys. Chem. B, 2006, 110, pp. 11139–11145 (doi: 10.1021/jp060905k).
25. 25)
  - 30. Amalnerkar, D.P., Pavaskar, N.R., Date, S.K., Sinha, A.P.B.: ‘Structural investigations of cubic yields hexagonal phase transformation in thick films of photoconducting CdS’, Indian J. Pure Appl. Phys., 1985, 23, pp. 539–547.
26. 26)
  - 15. Kida, T., Guan, G., Yoshida, A.: ‘LaMnO3/CdS nanocomposite: a new photocatalyst for hydrogen production from water under visible light irradiation’, Chem. Phys. Lett., 2003, 371, pp. 563–567 (doi: 10.1016/S0009-2614(03)00312-9).
27. 27)
  - 28. Hashimoto, K., Toda, Y.: ‘Mechanical-chemical effects on the grinding of α-cadmium sulfide and α-cadmium selenide’, Kogyo Kagaku Zasshi, 1968, 71, pp. 1402–1406 (doi: 10.1246/nikkashi1898.71.9_1402).
28. 28)
  - 29. Tsunashima, M., Mori, K., Tsutsumi, K., Takahashi, H.: ‘Cadmium series pigments. I. Changes in crystal structure and color of cadmium series pigments by grinding’, Kogyo Kagaku Zasshi, 1971, 74, pp. 1733–1739 (doi: 10.1246/nikkashi1898.74.9_1733).
29. 29)
  - C.-C. Chen , A.B. Herhold , C.S. Johnson , A.P. Alivisatos . Size dependence of structural metastability in semiconductor nanocrystals. Science , 398 - 401
30. 30)
  - 2. Suzuki, T., Yagi, T., Akimoto, S., Kowamura, T., Tayoda, S., Endo, S.: ‘Compression behavior of CdS and BP up to 68 GPa’, J. Appl. Phys., 1983, 54, pp. 748–751 (doi: 10.1063/1.332032).
31. 31)
  - 27. Matsumoto, K., Takagi, K., Kaneko, S.: ‘Kinetics of the cubic → hexagonal transformation of cadmium sulfide’, J. Electrochem. Soc., 1983, 130, pp. 423–426 (doi: 10.1149/1.2119724).
32. 32)
  - 38. Xiong, Y., Zhang, J., Huang, F., et al: ‘Growth and phase-transformation mechanisms of nanocrystalline CdS in Na2S solution’, J. Phys. Chem. C, 2008, 112, pp. 9229–9233 (doi: 10.1021/jp801628e).
33. 33)
  - 25. Patra, S., Satpati, B., Pradhan, S.K.: ‘Quickest single-step mechanosynthesis of CdS quantum dots and their microstructure characterization’, J. Nanosci. Nanotech., 2011, 11, pp. 4771–4780 (doi: 10.1166/jnn.2011.3927).
34. 34)
  - 7. Schlamp, M.C., Peng, X., Alivisatos, A.P.: ‘Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer’, J. Appl. Phys., 1997, 82, pp. 5837–5842 (doi: 10.1063/1.366452).
35. 35)
  - 32. Gorer, S., Hodes, G., Sorek, Y., Reisfeld, R.: ‘Crystal phase transformation in sol-gel films of nanocrystalline CdSe and CdS’, Mater. Lett., 1997, 31, pp. 209–214 (doi: 10.1016/S0167-577X(96)00272-8).
36. 36)
  - 21. Bandaranayake, R.J., Wen, G.W., Lin, J.Y., Jiang, H.X., Sorensen, C.M.: ‘Structural phase behavior in II-VI semiconductor nanoparticles’, Appl. Phys. Lett., 1995, 67, pp. 831–833 (doi: 10.1063/1.115458).
37. 37)
  - 5. Khallaf, H., Oladeji, I.O., Chai, G., Chow, L.: ‘Optimization of chemical bath deposited CdS thin films using nitrilotriacetic acid as a complexing agent’, Thin Solid Films, 2008, 516, pp. 5967–5973 (doi: 10.1016/j.tsf.2007.10.079).
38. 38)
  - 35. Oskam, G., Nellore, A., Penn, R.L., Searson, P.C.: ‘The growth kinetics of TiO2 nanoparticles from titanium (IV) alkoxide at high water/titanium ratio’, J. Phys. Chem. B, 2003, 107, pp. 1734–1738 (doi: 10.1021/jp021237f).

Facile one-pot low-temperature solid-state approach towards phase transformation of nanoCdS

References

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