Room temperature LPG sensor based on n-CdS/p-polyaniline heterojunction

The role of (photo)electrochemistry in the rational design of hybrid conducting polymer/semiconductor assemblies: From fundamental concepts to practical applications

“…A c c e p t e d M a n u s c r i p t toluene with high sensitivity and selectivity [78]. Detection of liquefied petroleum gas (LPG) was performed using a series of SC/PANI heterojunctions, containing CdTe [107], CdS [105] and PbS [109] respectively. In these studies, changes in the I-V curves were correlated with the LPG concentration and the response alteration were rationalized in terms of the modification of the organic/inorganic interface.…”

Novel synthesis approach for stable sodium superoxide (NaO2) nanoparticles for LPG sensing application

“…The results of the chemiresistor is reproducible, may be due to its stable characteristics against the atmospheric change. The response and recovery time value determined in this work is quite fast than reported in literature [11,12]. The achievement of the present work is low operating temperature, which is below the auto-ignition temperature of LPG.…”

CdS nanodroplets over silica microballs for efficient room-temperature LPG detection

“…Indeed, selectivity is measured in terms of the selectivity coefficient/factor of a target gas to another gas and given by K ¼ S A /S B , where S A and S B are the responses of a sensor to a target gas "A" and an interference gas "B", respectively. 6 To estimate the selectivity of S 2 to LPG at optimum OT, i.e., RT, the gas responses towards H 2 , H 2 S, CO 2 , and NO 2 at a concentration of 1000 ppm each were also measured, as shown in the inset of Fig. 6a.…”

“…Enormous efforts have been made to develop a gas sensor with high sensitivity, high selectivity, short response and recovery times and most importantly a low operating temperature using diverse materials to detect noxious, explosive, inammable and pollutant gases. [5][6][7][8][9][10] However, the invention of semiconductor-based sensing devices with identical desired parameters to identify hazardous gases for a healthy ambience is still an open challenge for researchers. Many successful efforts have been made to achieve a low operating temperature using a variety of nanomaterials; their hybrid structures and composite materials have even been demonstrated to work at room temperature (RT).…”

“…Nevertheless, the other sensing parameters, viz., the response and recovery times, sensitivity, and detection limit depend on other composite or heterostructure materials. Dhawale et al 6 fabricated an LPG sensor based on an n-CdS/ppolyaniline thin lm heterojunction using a simple inexpensive electrodeposition technique. Their sensor could detect LPG at RT with a gas response of 80% and it exhibited 95% stability on exposure to 1040 ppm concentration of gas.…”