The nano-titanium dioxide (nano-TiO_2) sensing membrane,fabricated by sol-gel technology,was used as the pH-sensing layer of the extended gate field effect transistor (EGFET) device.The objective of this research is t...The nano-titanium dioxide (nano-TiO_2) sensing membrane,fabricated by sol-gel technology,was used as the pH-sensing layer of the extended gate field effect transistor (EGFET) device.The objective of this research is the preparation of titanium dioxide materials by sol-gel method using Ti(OBu)_4 as the precursor.In this study,we fabricated a nano-titanium dioxide sensing layer on the ITO glass by dip coating.In order to examine the sensitivity of the nano-TiO_2 films applied to the EGFET devices,we adopted the ITO glass as substrate,and measured theⅠ_(DS)-Ⅴ_G curves of the nano-titanium dioxide separative structure EGFET device in the pH buffer solutions that have different pH values by the Keithley 236 Instrument.By the experimental results,we can obtain the pH sensitivities of the EGFET with nano-TiO_2 sensing membrane prepared by sol-gel method,which is 59.86mV/pH from pH 1 to pH 9.展开更多
La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesize...La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesized samples.The influence of La3+ doping on the structure and phase transformation behaviors of anatase to rutile TiO2 powders was investigated by means of XRD.UV-vis adsorption spectroscopy revealed that La-doped TiO2 has a strong a adsorption band and the absorption edge were red-shifted compartion with pure TiO2.The experiment results of photocatalytic decomposition of methyl-organge indicated that La-doping restrained the transformation of anatase to rutile and growth of grain.Therefore,La-doping improved the TiO2 photocatalytic activity in photodegradation of methyl-organge.In addition,experiments also illustrate that the catalyst has good activity of decolor rate of Yan’an cigarette factory wastewater.展开更多
文摘The nano-titanium dioxide (nano-TiO_2) sensing membrane,fabricated by sol-gel technology,was used as the pH-sensing layer of the extended gate field effect transistor (EGFET) device.The objective of this research is the preparation of titanium dioxide materials by sol-gel method using Ti(OBu)_4 as the precursor.In this study,we fabricated a nano-titanium dioxide sensing layer on the ITO glass by dip coating.In order to examine the sensitivity of the nano-TiO_2 films applied to the EGFET devices,we adopted the ITO glass as substrate,and measured theⅠ_(DS)-Ⅴ_G curves of the nano-titanium dioxide separative structure EGFET device in the pH buffer solutions that have different pH values by the Keithley 236 Instrument.By the experimental results,we can obtain the pH sensitivities of the EGFET with nano-TiO_2 sensing membrane prepared by sol-gel method,which is 59.86mV/pH from pH 1 to pH 9.
文摘La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesized samples.The influence of La3+ doping on the structure and phase transformation behaviors of anatase to rutile TiO2 powders was investigated by means of XRD.UV-vis adsorption spectroscopy revealed that La-doped TiO2 has a strong a adsorption band and the absorption edge were red-shifted compartion with pure TiO2.The experiment results of photocatalytic decomposition of methyl-organge indicated that La-doping restrained the transformation of anatase to rutile and growth of grain.Therefore,La-doping improved the TiO2 photocatalytic activity in photodegradation of methyl-organge.In addition,experiments also illustrate that the catalyst has good activity of decolor rate of Yan’an cigarette factory wastewater.
