Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag2O·SrO·CaO

Md Abdus Subhan; Tanjila Parvin Rifat; Pallab Chandra Saha; M M Alam; Abdullah M Asiri; Mohammed M Rahman; Sonia Akter; Topu Raihan; A K Azad; Jamal Uddin

doi:10.1039/d0ra01205j

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

RSC Adv. 2020 Mar 19;10(19):11274-11291. doi: 10.1039/d0ra01205j. eCollection 2020 Mar 16.

Authors

Affiliations

¹ Department of Chemistry, School of Physical Sciences, Shah Jalal University of Science and Technology Sylhet-3114 Bangladesh subhan-che@sust.edu +8801716073270.
² Department of Chemical Engineering and Polymer Science, Shah Jalal University of Science and Technology Sylhet 3100 Bangladesh.
³ Center of Excellence for Advanced Materials Research (CEAMR), Department of Chemistry, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia mmrahman@kau.edu.sa +966-12-695-2292 +966-59-642-1830.
⁴ Department of Genetics and Biotechnology, Shah Jalal University of Science and Technology Sylhet-3114 Bangladesh.
⁵ Center for Nanotechnology, Coppin State University Baltimore MD USA.

Abstract

A novel multi-metal oxide nanocomposite, Ag₂O·SrO·CaO, was synthesized by a facile co-precipitation method followed by calcinations. The synthesized nanocomposite was characterized by XRD, FESEM, EDS, TEM, FTIR spectroscopy and photoluminescence (PL) spectroscopy. The composite showed enhanced photocatalytic activity under visible light irradiation and excellent anti-bacterial performance against both Gram-positive and Gram-negative bacteria. Here, the synthesized Ag₂O·SrO·CaO nanomaterials were deposited on a glassy carbon electrode (GCE) in the form of a thin film to fabricate the desired electrochemical sensor and subjected to I-V analysis of 3-chlorophenol (3-CP) in a phosphate buffer solution (PBS). A calibration curve was plotted from the linear relation of current versus concentration and used to calculate the sensitivity (8.9684 μA μM^-1 cm^-2), linear dynamic range (LDR, 0.1 nM to 0.01 mM) and lower limit of detection (DL, 97.12 ± 4.86 pM). The analytical parameters of the sensor such as response time, reproducibility and long-term stability in the detection of 3-CP were reliable. Finally, it was used to analyze real samples collected from various environmental sources and found to be acceptable.