Ghule, Balaji; Shaikh, Shoyebmohamad F.; Ekar, Satish; Nakate, Umesh Tukaram; Gunturu, Krishna Chaitanya; Shinde, Nanasaheb; Naushad, Mu; Kim, Kwang Ho; O'Dwyer, Colm; Mane, Rajaram

2017

Unknown

Acs Applied Materials & Interfaces

Natural Carbonized Sugar as a Low-temperature Ammonia Sensor Material: Experimental, Theoretical and Computational Studies

Validated

WOS: 25 ()

Carbonized sugar Structural analysis Surface morphology Ammonia sensor Density Function Theory

9

43051

43060

Bearing in mind the advantages of useful, cost-effective and eco-friendly synthesis, carbonized sugar (CS) has been synthesized via microwave-assisted carbonization of market quality table-top sugar. The as-prepared CS has been characterized for its morphology, phase purity, type of porosity and pore-size distribution. The gas sensing properties of CS for various oxidizing and reducing gases are demonstrated at ambient temperature where we observe good selectivity towards liquid ammonia amongst other gases. The highest ammonia response (50%) of a CS-based sensor was noted at 80°C for 100 ppm concentration. The response and recovery times of CS sensor are 180 s and 216 s, respectively. The effect of relative humidity on CS sensor, at ambient temperature, has also been studied and reported where 16 % and 62 % minimum and maximum humidity response values are respectively obtained. The unveiling ammonia sensing study is explored through plausible theoretical mechanism which further is well-supported by computational modelling performed using density function theory.

1944-8244

http://dx.doi.org/10.1021/acsami.7b13122

10.1021/acsami.7b13122