UV Cured Polymeric Optical Fluorescence Sensor for the Determination of Au (III)

Abstract

Summary The recognition and sensing of the biologically and environmentally important metal ions has emerged as a significant goal in the field of chemical sensors in recent years. Among the various analytical methods, fluorescence has been a powerful tool due to its simplicity, high detection limit and application to bio imaging. In this study, UV cured polymeric optical sensor for Au (III) ion based on a fluorescence membrane has been developed. The response characteristics of the sensor including dynamic range, pH effect and response time were systematically investigated. The influences of the conditions such as pH, response time on the metal ion binding capacity of membrane were also tested.

Radiation synthesis of polyvinyl alcohol/acrylic acid/magnesium oxide composite hydrogel for removal of boron from its aqueous solution

“…Finally, Scheme 1 represents the type and the mechanism of chelating of boron by the prepared poly(PVA/AAc) hydrogel and poly(PVA/AAc/MgO) composite hydrogel between different moieties acrylic–acrylic, acrylic-PVA, and PVA-PVA which describe the reason of the high removal properties of the prepared poly(PVA/AAc) hydrogel and poly(PVA/AAc/MgO) composite hydrogel than other previously prepared materials described in Introduction part. 1,2,4,7–13…”

“…The low-cost poly(PVA: AAc/MgO) composite hydrogel with composition (80:20 vol.%/5 wt%) was characterized by good properties than other hydrogels and has higher adsorption capacity toward boron than any other previously reported review. The absorption of boron indicates complex formation via ion exchange and chelation between poly(PVA/AAc/MgO) and boron due to the presence of different moieties acrylic-acrylic, acrylic-PVA, and PVA-PVA as shown in Scheme (1).…”

“…Finally, Scheme 1 represents the type and the mechanism of chelating of boron by the prepared poly(PVA/AAc) hydrogel and poly(PVA/AAc/MgO) composite hydrogel between different moieties acrylic-acrylic, acrylic-PVA, and PVA-PVA which describe the reason of the high removal properties of the prepared poly(PVA/AAc) hydrogel and poly(PVA/AAc/MgO) composite hydrogel than other previously prepared materials described in Introduction part. 1,2,4,[7][8][9][10][11][12][13] Scanning electron microscopy The SEM images showed that there are significant changes on the morphology of the prepared hydrogels according to its different chemical structures. It is clear that the surface of poly(PVA/AAc) hydrogel has low diameter pores, while the surface of poly(PVA: AAc/MgO) composite hydrogel with composition (80:20 vol.%/5 wt%) before adsorption of boron characterized by high porous structure with increasing the average pore size diameter than poly(PVA/AAc) hydrogel.…”

“…Boron is used in various industries and applications such as textile dyes, soap, detergent, solder, photography, nuclear field, glass fiber, and paper industry 1 and also in the production of glass, enamels, glazes, skin, synthetic detergents, and microfertilizers. 2 It is also necessary for humans and animals and affects crop productivity and plant growth but in small amount.…”

“…2 It is also necessary for humans and animals and affects crop productivity and plant growth but in small amount. 1 The recommended concentration of boron for drinking water according to the World Health Organization guidelines is up to 2.4 mg l À1 , 3,4 and the level of boron in drinking, irrigating water, and wastewaters discarded to the environment is 1.0 mg l À1 . 5,6 The high levels of boron are harmful and even lethal to plants.…”