Spectroscopic studies of vanadium incorporated SAPO-11

✍ Scribed by Puyam S. Singh; Rajib Bandyopadhyay; B.S. Rao

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 724 KB
• Volume: 104
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(95)00126-3

✦ Synopsis

The incorporation of vanadium during the hydrothermal synthesis of SAPO-11 is reported. The sample is characterized by different spectroscopic techniques namely XRD, ESR, TPR, UV-VIS and "V MAS-NMR. ESR, UV-VIS and 5'V MAS-NMR studies reveal that vanadium in VAPSO-11 is located in square pyramidal or distorted octahedral structures. Vanadium shows redox behaviour ( V4+ to Vs+ and vice versa) when calcined and reduced. Samples prepared by impregnation of vanadium into SAPO-11 (V-SAPO-11) are compared with VAPSO-11.