title: Photocatalytic, antimicrobial activities of biogenic silver nanoparticles and electrochemical degradation of water soluble dyes at glassy carbon/silver modified past electrode using buffer solution.
abstract: In the present research work a novel, nontoxic and ecofriendly procedure was developed for the green synthesis of silver nano particle (AgNPs) using Caruluma edulis (C. edulis) extract act as reductant as well as stabilizer agents. The formation of AgNPs was confirmed by UV/Vis spectroscopy. The small and spherical sizes of AgNPs were conformed from high resolution transmission electron microscopy (HRTEM) analysis and were found in the range of 2-10nm, which were highly dispersion without any aggregation. The crystalline structure of AgNPs was conformed from X-ray diffraction (XRD) analysis. For the elemental composition EDX was used and FTIR helped to determine the type of organic compounds in the extract. The potential electrochemical property of modified silver electrode was also studied. The AgNPs showed prominent antibacterial motion with MIC values of 125 μg/mL against Bacillus subtilis and Staphylococcus aureus while 250 μg/mL against Escherichia coli. High cell constituents' release was exhibited by B. subtilis with 2 × MIC value of silver nanoparticles. Silver nanoparticles also showed significant DPPH free radical scavenging activity. This research would have an important implication for the synthesis of more efficient antimicrobial and antioxidant agent. The AgNP modified electrode (GC/AgNPs) exhibited an excellent electro-catalytic activity toward the redox reaction of phenolic compounds. The AgNPs were evaluated for electrochemical degradation of bromothymol blue (BTB) dyes which showed a significant activity. From the strong reductive properties it is obvious that AgNPs can be used in water sanitization and converting some organic perilous in to non-hazardous materials. The AgNPs showed potential applications in the field of electro chemistry, sensor, catalyst, nano-devices and medical.
authors.affiliation: Department of Chemistry, University of Science and Technology Bannu, 28100 Khyber Pakhtunkhwa, Pakistan; School of Science, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: ziaulhaqkhan11@gmail.com.
authors.forename: Zia Ul Haq
authors.initials: ZU
authors.lastname: Khan
authors.affiliation: The Research Center for Medical Genomics, College of Basic Medical Science China Medical University, Shenyang 110122,China.
authors.forename: Amjad
authors.initials: A
authors.lastname: Khan
authors.affiliation: Department of Chemistry, University of Science and Technology Bannu, 28100 Khyber Pakhtunkhwa, Pakistan.
authors.forename: Afzal
authors.initials: A
authors.lastname: Shah
authors.affiliation: School of Science, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: chenym@mail.buct.edu.cn.
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Chen
authors.affiliation: School of Science, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: pywan@mail.buct.edu.cn.
authors.forename: Pingyu
authors.initials: P
authors.lastname: Wan
authors.affiliation: School of Science, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Arif Ullah
authors.initials: AU
authors.lastname: Khan
authors.affiliation: School of Science, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Kamran
authors.initials: K
authors.lastname: Tahir
authors.affiliation: Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore 54000, Pakistan.
authors.forename: Nawshad
authors.initials: N
authors.lastname: Muhamma
authors.affiliation: School of Science, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Faheem Ullah
authors.initials: FU
authors.lastname: Khan
authors.affiliation: Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Hidayat Ullah
authors.initials: HU
authors.lastname: Shah
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology*; D002021:Buffers; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D053768:Metal Nanoparticles; D008826:Microbial Sensitivity Tests; D046529:Microscopy, Electron, Transmission; D010777:Photochemistry; D012834:Silver / Q000737:chemistry / Q000494:pharmacology*; D012995:Solubility; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water; D014961:X-Ray Diffraction
chemical_list: D000890:Anti-Infective Agents; D002021:Buffers; D004396:Coloring Agents; D014867:Water; D012834:Silver
keywords: Antimicrobial and antioxidant activities; Electrochemical properties and modified GC/AgNP electrode; Photo degradation of bromothymol blue (BTB); Silver nanoparticles