Baies, Radu

Banica, Radu

Linul, Petrica A.

Mosoarca, Cristina

Racu, Andrei

Svera, Paula

Ursu, Daniel

Svera Paula

Racu Andrei

Mosoarca Cristina

Ursu Daniel

Linul Petrica A.

Baies Radu

Banica Radu

University of Szeged

21st International Symposium on Analytical and Environmental Problems   310  Effects of the precursors on the photocatalytic water splitting activity of ZnS/CdS compounds  Paula Svera*1,2, Andrei V. Racu1,3, Cristina Mosoarca1, Daniel Ursu1,2,  Petrica Linul 1,  Radu Baies1,2, Radu Banica1,2  1Renewable Energies Laboratory – Photovoltaics, National Institute for Research and Development in Electrochemistry and Condensed Matter, 144 Dr. A. Paunescu Podeanu Str., 300569 Timisoara, Romania; 2University Politehnica Timisoara, 2 Piata Victoriei, 300006 Timisoara, Romania; 3Institute of Applied Physics of Moldova, ASM, 5 Academiei Str., Chisinau, Moldova; Corresponding author: radu.banica@yahoo.com  CdS-based calcogenic photocatalysts show the highest efficiency of hydrogen production by photocatalysis reaction in aqueous solution medium containing sulfide ions [1]. The work aim was to understend the influence of  the ZnS precursor crystallinity on the formation of heterostructured PdS/ZnS/Cd1-xZnxS photocatalysts and also the influence of the synthesis temperature and time on photocatalysts acivity. Particularly, Cd1-xZnxS type photocatalysts can be obtained by various techniques including hydrothermal method. We use hydrothermal technique due to the fact that this method allows the obtaining of high crystallinity and large surface area photocatalysts [2].  Photocatalyst's morphology and its compositional homogenity was determined by SEM, TEM/ DX, crystallinity by XRD and the optical properties of the material by UV-VIS and photoluminescence spectroscopies. Photocatalytic reactions were conducted at room temperature under visible light irradiation. It was observed that the precursor’s crystallinity has greater impact on the photocatalytic performance than the synthesis temperature and the reaction time. This confirm that the efficiency of hydrogen production can be influcenced and improved by controling of  crytalinity of photocatalysts.  References: [1]  Q. Chen, C. Suo, S. Zhang, Y. Wang, Effect of PdS on photocatalytic hydrogen evolution of nanostructured CdS under visible light irradiation, International Journal of Photoenergy, 2013, vol. 2013, pg. 1-5 [2]  Z. Xiong, M. Zheng, C. Zhu, B. Zhang, L. Ma, W. Shen, One-step synthesis of highly efficient three-dimensional Cd1-xZnxS photocatalysts for visible light photocatalytic water splitting, Nanoscale Research Letters, 2013, 8:334, pg. 1-6  Acknowledgments: This work was carried out through the Partnerships in priority areas - PN II program, developed with the support of MEN - UEFISCDI, project no. PN-II-PT-PCCA-2013-4-1708.   

Effects of the precursors on the photocatalytic water splitting activity of ZnS/CdS compounds

http://acta.bibl.u-szeged.hu/55989/1/proceedings_of_isaep_2015_310.pdf

Effects of the precursors on the photocatalytic water splitting activity of ZnS/CdS compounds

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