Enhancement of Photocatalytic Performance of Anatase by Silver Deposition through Chemical Reduction Process at Room Temperature

Abstract:

Herein, Ag-anatase photocatalysts were synthesized though chemical reduction method under room temperature by using PVP and NaBH₄ as stabilizer and strong reducing agent, respectively. The prepared photocatalysts were characterized by the following technique: XRD, SEM, HR-TEM, EDX, and UV-Vis-NIR. The photocatalytic performance of 0.05 g of photocatalysts were performed under UV irradiation within 1 h by using 10 mg/L of rhodamine B as the representative of organic pollutant. The results demonstrated that the optimum Ag loading contents were 2 %wt (2-ST) which can degrade rhodamine B up to 98.54%. Therefore, the photocatalytic performance of bare anatase could be enhanced by deposited Ag nanoparticles. Further, this prepared Ag-anatase could be suitable for environmental application.

• Periodical: Materials Science Forum (Volume 998)
• Pages: 71-77
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.998.71
• Online since: June 2020
• Authors: Tanaporn Narkbuakaew, Pornapa Sujaridworakul*
• Keywords: Ag Nanoparticles, Anatase, Chemical Deposition, Photocatalyst, UV Irradiation

References

[1] J. Zhang, P. Zhou, J. Liu, and J. Yu, New understanding of the difference of photocatalytic activity among anatase, rutile and brookite TiO2, Phys. Chem. Chem. Phys. 38 (2014) 20382-20386.

DOI: 10.1039/c4cp02201g

[2] S. Xie, Q. Zhang, G. Liu, and Y. Wang, Photocatalytic and photoelectrocatalytic reduction of CO2 using heterogeneous catalysts with controlled nanostructures, Chem. Commun. 1 (2016) 35-59.

DOI: 10.1039/c5cc07613g

[3] O. Ola and M. M. Maroto-Valer, Journal of Photochemistry and Photobiology C, Review of material design and reactor engineering on TiO2 photocatalysis for CO2 reduction, Photochemistry Reviews. 24 (2015) 16-42.

DOI: 10.1016/j.jphotochemrev.2015.06.001

[4] E. Albiter, M. Valenzuela, S. Alfaro, G. Valverde-Aguilar, and F. Martínez-Pallares, Photocatalytic deposition of Ag nanoparticles on TiO2:Metal precursor effect on the structural and photoactivity properties, J. Saudi Chem. Soc. 5 (2015) 563-573.

DOI: 10.1016/j.jscs.2015.05.009

[5] M. Hussain, S. Tariq, M. Ahmad, H. Sun, K. Maaz, G. Ali, S. Z. Hussain, M. Iqbal, S. Karim, and A. Nisar, AgTiO2 nanocomposite for environmental and sensing applications, Mater. Chem. Phys. 181 (2016) 194-203.

DOI: 10.1016/j.matchemphys.2016.06.049

[6] R. Nainani, P. Thakur, and M. Chaskar, Synthesis of silver doped TiO2 nanoparticles for the improved photocatalytic degradation of methyl orange, ‎Mater. Sci. Eng. B. 1 (2012) 52-58.

[7] A. A. Ashkarran, S. M. Aghigh, and N. J. Farahani, Visible light photo-and bioactivity of Ag/TiO2 nanocomposite with various silver contents, Curr. Appl. Phys. 4 (2011) 1048-1055.

DOI: 10.1016/j.cap.2011.01.042

[8] D.-S. Lee and Y.-W. Chen, Nano Ag/TiO2 catalyst prepared by chemical deposition and its photocatalytic activity, J. Taiwan. Inst. Chem. Eng. 2 (2014) 705-712.

DOI: 10.1016/j.jtice.2013.07.007

[9] W. Li, R. Liang, A. Hu, Z. Huang, and Y. N. Zhou, Generation of oxygen vacancies in visible light activated one-dimensional iodine TiO2 photocatalysts, RSC Adv. 70 (2014) 36959-36966.

DOI: 10.1039/c4ra04768k

[10] E. T. Wahyuni, R. Roto, and M. PrameSwari, TiO2/Ag-nanoparticle as a Photocatalyst for Dyes Degradation, Inter. Conf. on Envi. Sci. and Tech. (2017) 615.

[11] M. M. Khan, S. A. Ansari, M. I. Amal, J. Lee, and M. H. Cho, Highly visible light active Ag@ TiO2 nanocomposites synthesized using an electrochemically active biofilm, Nanoscale. 10 (2013) 4427-4435.

DOI: 10.1039/c3nr00613a

[12] D. P. Kumar, N. L. Reddy, M. Karthik, B. Neppolian, J. Madhavan, and M. Shankar, Solar light sensitized p-Ag2O/n-TiO2 nanotubes heterojunction photocatalysts for enhanced hydrogen production in aqueous-glycerol solution, Sol. Energy Mater. Sol. Cells. 154 (2016) 78-87.

DOI: 10.1016/j.solmat.2016.04.033

[13] J. V. Hernández, S. Coste, A. G. Murillo, F. C. Romo, and A. Kassiba, Effects of metal doping (Cu, Ag, Eu) on the electronic and optical behavior of nanostructured TiO2, J. Alloy. Compd. 710 (2017) 355-363.

DOI: 10.1016/j.jallcom.2017.03.275

[14] K. H. Leong, B. L. Gan, S. Ibrahim, and P. Saravanan, Synthesis of surface plasmon resonance (SPR) triggered Ag/TiO2 photocatalyst for degradation of endocrine disturbing compounds, Appl. Surf. Sci. 319 (2014) 128-135.

DOI: 10.1016/j.apsusc.2014.06.153

[15] E. Liu, L. Kang, Y. Yang, T. Sun, X. Hu, C. Zhu, H. Liu, Q. Wang, X. Li, and J. Fan, Plasmonic Ag deposited TiO2 nano-sheet film for enhanced photocatalytic hydrogen production by water splitting, Nanotechnology. 16 (2014) 165401.

DOI: 10.1088/0957-4484/25/16/165401

[16] A. L. Ortiz, M. M. Zaragoza, J. S. Gutiérrez, M. M. da Silva Paula, and V. Collins-Martínez, Silver oxidation state effect on the photocatalytic properties of Ag doped TiO2 for hydrogen production under visible light, ‎Int. J. Hydrog. Energy. 48 (2015) 17308-17315.

DOI: 10.1016/j.ijhydene.2015.09.058

[17] M. Stucchi, C. Bianchi, C. Argirusis, V. Pifferi, B. Neppolian, G. Cerrato, and D. Boffito, Ultrasound assisted synthesis of Ag-decorated TiO2 active in visible light, Ultrasonics sonochemistry. 40 (2018) 282-288.

DOI: 10.1016/j.ultsonch.2017.07.016

[18] M. R. Khan, T. W. Chuan, A. Yousuf, M. Chowdhury, and C. K. Cheng, Schottky barrier and surface plasmonic resonance phenomena towards the photocatalytic reaction: study of their mechanisms to enhance photocatalytic activity, Catal. Sci. Technol. 5 (2015) 2522-2531.

DOI: 10.1039/c4cy01545b

[19] N. T. Thanh, N. Maclean, and S. Mahiddine, Mechanisms of nucleation and growth of nanoparticles in solution, Chem. Rev. 15 (2014) 7610-7630.

DOI: 10.1021/cr400544s