Fabrication of SnO2/CQDs composite for photocatalytic degradation of malachite green dye

Rida Javed, Faisal Nawaz, Muhammad Sohail, Iqbal Ahmad


In the present study, an attempt had been made to design and fabricate the SnO2/CQDs composite. Initially, SnO2 nanoparticles were prepared by co-precipitation method. X-ray diffraction (XRD) results have revealed the formation of pure single phase tetragonal SnO2 nanoparticles. Carbon quantum dots (CQDs) have been prepared by microwave assisted method. The formation of SnO2/CQDs composite has been confirmed by fourier transformed infrared (FTIR) spectroscopy. The slight shift in peak position of Sn-O-Sn bond has revealed the formation of SnO2/CQDs composite. Scanning electron microscopy (SEM) of the samples has indicated the formation of SnO2 nanoparticles and dispersion of SnO2 nanoparticles into CQDs matrix. Further, SnO2 nanoparticles and its composite with CQDs were employed as photocatalysts in the degradation of Malachite green (MG) dye under open sun light irradiation. The excellent feature of the study is that for both the photocatalysts, only in 10 minutes complete degradation of dye has been achieved. Photocatalytic results have revealed that SnO2/CQDs photocatalyst possesses better photocatalytic activity than that of pure SnO2 nanoparticles.


Carbon quantum dots, SnO2 nanoparticles, Photocatalytic activity, SnO2/CQDs composite, degradation, fabrication

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Ahmad, I., Shah, S. M., Ashiq, M. N., & Khan, R. A. (2016). Effect of Nd3+ and Cd2+ ions co-substitution on the dielectric and electron transport properties of spinel strontium nanoferrites. Ceramics International, 42(11), 12763-12770.

Bethune, D. S., Klang, C. H., de Vries, M. S., Gorman, G., Savoy, R., Vazquez, J., & Beyers, R. (1993). Cobalt-catalysed growth of carbon nanotubes with single-atomic-layer walls. Nature, 363(6430), 605-607.

Bottini, M., Balasubramanian, C., Dawson, M. I., Bergamaschi, A., Bellucci, S., & Mustelin, T. (2006). Isolation and Characterization of Fluorescent Nanoparticles from Pristine and Oxidized Electric Arc-Produced Single-Walled Carbon Nanotubes. The Journal of Physical Chemistry B, 110(2), 831-836.

Bouhekka, A., & Bürgi, T. (2012). In situ ATR-IR spectroscopy study of adsorbed protein: Visible light denaturation of bovine serum albumin on TiO2. Applied Surface Science, 261, 369-374.

Bourlinos, A. B., Stassinopoulos, A., Anglos, D., Zboril, R., Georgakilas, V., & Giannelis, E. P. (2008). Photoluminescent carbogenic dots. Chemistry of Materials, 20(14), 4539-4541.

Cao, L., Wang, X., Meziani, M. J., Lu, F., Wang, H., Luo, P. G., Lin, Y., Harruff, B. A., Veca, L. M., Murray, D., Xie, S.-Y., & Sun, Y.-P. (2007). Carbon Dots for Multiphoton Bioimaging. Journal of the American Chemical Society, 129(37), 11318-11319.

Chandramouleeswaran, S., Mhaske, S., Kathe, A., Varadarajan, P., Prasad, V., & Vigneshwaran, N. (2007). Functional behaviour of polypropylene/ZnO–soluble starch nanocomposites. Nanotechnology, 18(38), 385-702.

Dong, W., Zhou, S., Dong, Y., Wang, J., Ge, X., & Sui, L. (2015). The preparation of ethylenediamine-modified fluorescent carbon dots and their use in imaging of cells. Luminescence, 30(6), 867-871.

Gnanam, S., & Rajendran, V. (2010). Synthesis of tin oxide nanoparticles by sol–gel process: effect of solvents on the optical properties. Journal of Sol-Gel Science and Technology, 53(3), 555-559.

Iijima, S. (1991). Helical microtubules of graphitic carbon. Nature, 354(6348), 56-58.

Kang, Z., Wang, E., Gao, L., Lian, S., Jiang, M., Hu, C., & Xu, L. (2003). One-Step Water-Assisted Synthesis of High-Quality Carbon Nanotubes Directly from Graphite. Journal of the American Chemical Society, 125(45), 13652-13653.

Kang, Z., Wang, E., Mao, B., Su, Z., Gao, L., Lian, S., & Xu, L. (2005). Controllable Fabrication of Carbon Nanotube and Nanobelt with a Polyoxometalate-Assisted Mild Hydrothermal Process. Journal of the American Chemical Society, 127(18), 6534-6535.

Kansal, S., Kaur, N., & Singh, S. (2009). Photocatalytic Degradation of Two Commercial Reactive Dyes in Aqueous Phase Using Nanophotocatalysts. Nanoscale Research Letters, 4(7), 709-716.

Kim, S. P., Choi, M. Y., & Choi, H. C. (2015). Characterization and photocatalytic performance of SnO2–CNT nanocomposites. Applied Surface Science, 357, Part A, 302-308.

Li, H., He, X., Kang, Z., Huang, H., Liu, Y., Liu, J., Lian, S., Tsang, C. H. A., Yang, X., & Lee, S.-T. (2010). Water-Soluble Fluorescent Carbon Quantum Dots and Photocatalyst Design. Angewandte Chemie International Edition, 49(26), 4430-4434.

Muthulingam, S., Lee, I.-H., & Uthirakumar, P. (2015). Highly efficient degradation of dyes by carbon quantum dots/N-doped zinc oxide (CQD/N-ZnO) photocatalyst and its compatibility on three different commercial dyes under daylight. Journal of Colloid and Interface Science, 455, 101-109.

Scarisoreanu, M., Fleaca, C., Morjan, I., Niculescu, A.-M., Luculescu, C., Dutu, E., Ilie, A., Morjan, I., Florescu, L. G., Vasile, E., & Fort, C. I. (2017). High photoactive TiO2/SnO2 nanocomposites prepared by laser pyrolysis. Applied Surface Science, 418, Part B, 491-498.

Silverstein, R. M., Webster, F. X., Kiemle, D. J., & Bryce, D. L. (2014). Spectrometric identification of organic compounds (8th Ed.). New York: Wiley

Sun, Y.-P., Zhou, B., Lin, Y., Wang, W., Fernando, K. A. S., Pathak, P., Meziani, M. J., Harruff, B. A., Wang, X., Wang, H., Luo, P. G., Yang, H., Kose, M. E., Chen, B., Veca, L. M., & Xie, S.-Y. (2006). Quantum-Sized Carbon Dots for Bright and Colorful Photoluminescence. Journal of the American Chemical Society, 128(24), 7756-7757.

Wang, W., Dong, L., Gong, S., Deng, Y., Yu, J., Dong, H., Wang, T., & Sun, W. (2015). Electrochemistry of myoglobin on graphene–SnO2 nanocomposite modified electrode and its electrocatalysis. Arabian Journal of Chemistry. https://doi.org/10.1016/j.arabjc.2015.09.007

Yang, H., Hu, Y., Tang, A., Jin, S., & Qiu, G. (2004). Synthesis of tin oxide nanoparticles by mechanochemical reaction. Journal of Alloys and Compounds, 363(1), 276-279.

Yu, S.-J., Kang, M.-W., Chang, H.-C., Chen, K.-M., & Yu, Y.-C. (2005). Bright Fluorescent Nanodiamonds: No Photobleaching and Low Cytotoxicity. Journal of the American Chemical Society, 127(50), 17604-17605.

Zhai, X., Zhang, P., Liu, C., Bai, T., Li, W., Dai, L., & Liu, W. (2012). Highly luminescent carbon nanodots by microwave-assisted pyrolysis. Chemical Communications, 48(64), 7955-7957.

Zheng, L., Chi, Y., Dong, Y., Lin, J., & Wang, B. (2009). Electrochemiluminescence of Water-Soluble Carbon Nanocrystals Released Electrochemically from Graphite. Journal of the American Chemical Society, 131(13), 4564-4565.

Zhou, J., Booker, C., Li, R., Zhou, X., Sham, T.-K., Sun, X., & Ding, Z. (2007). An Electrochemical Avenue to Blue Luminescent Nanocrystals from Multiwalled Carbon Nanotubes (MWCNTs). Journal of the American Chemical Society, 129(4), 744-745.


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