TY  - JOUR
T1  - Tannic Acid Stabilized Silver Nanoparticles and its Sensing Application to Pyrazosulfuron Ethyl Herbicide
AU - Watcharaporn, Kanitta AU - Opaprakasit, Mantana AU - Pimpan, Vimolvan 
JO  - Journal of Engineering and Applied Sciences
VL  - 11
IS  - 10
SP  - 2113
EP  - 2117
PY  - 2016
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2016.2113.2117
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2016.2113.2117
KW  - Silver nanoparticles
KW  -tannic acid
KW  -herbicide
KW  -sensor
KW  -Thailand
AB  - Tannic acid-stabilized silver nanoparticles were synthesized using various initial pH conditions ranging from 5.0-9.0 under UV exposure for 60 min. At pH of 5.0, the color of the silver nanoparticles colloids changed from yellow to greenish blue and the characteristic peak shifted from 420-635 nm as the amounts of pyrazosulfuron-ethyl herbicide increased from 0-400 ppm. On the other hand, those nanoparticles colloids synthesized at pH of 6.0 showed the color change from yellow to red. However, at neutral and alkali conditions, the obtained nanoparticles colloids did not exhibit the sensing ability to this herbicide. The results indicated that UV radiation assisted method can be used for the synthesis of the nano particles at various pH conditions using tannic acid as both reducing agent and stabilizer. This can increase the opportunity to use silver nanoparticles in sensing applications, especially for pH dependent chemicals such as this herbicide.
ER  -