Preparation of biomorphic porous LaFeO3 by sorghum straw biotemplate method and its acetone sensing properties

Synthesis of three-dimensionally ordered macroporous LaFeO3 with enhanced methanol gas sensing properties

“…5(a) shows the relationship between operating temperature and response of the S1 and S ref -based sensors to 100 ppm methanol gas. Both samples show p-type gas sensing behavior between 150 and 300 • C. The gas response of S1 increases at temperature values below 190 • C, and then gets down when the temperature is higher than 190 • C. Besides, the gas response of S1 gets its maximum (96) value at 190 • C, while that of S ref gets its maximum value (24) at 170 • C. This difference of two types of samples is caused by the difference of their band gaps [23]. To investigate the band gaps of two samples, the UV-vis absorption spectra are shown in Fig.…”

“…The 3DOM structure serves a large surface area owing to its porosity structure [21], which can improve gas sensitivity of material [22,23]. Besides, gas diffusing can beneficiate from the ordered macroporous structure, which can improve sensing property via decreasing response and recovery times [24]. So far, only a few reports on the gas sensing properties of 3DOM-structured ABO 3 metal oxide have been seen in the literature [25,26].…”

A novel organic pollutants gas sensing material p-type CuAlO 2 microsphere constituted of nanoparticles for environmental remediation

“…In p-type semiconducting oxide, adsorbed oxygen behaves as a surface acceptor state, trapping electrons from the valence band and hence increasing the hole concentration. In general case, the interaction of oxidation with the adsorbed oxygen at the sensor surface has been explained in our previous publication [44].…”

“…The adsorption of oxygen anions in p-type oxide semiconductors form the hole accumulation layers (HAL) near the surface of the material because of the electrostatic interaction between the oppositely charge species, which again establishes the electronic core-shell configuration; that is, the insulating region at the cores of particles and semiconducting HALs near the surface of the particles [44].…”

Biotemplates and Their Uses in Nanomaterials Synthesis: A Review

“…Peng Song et al (2014) had worked on this bio template for the synthesis biomorphic porous LaFeO3. After analysis through scanning electron microscope (SEM), transmission electron microscope (TEM), see fig: 2(a, b & c) that it is porous and honeycomb like network framework.…”