Pub Date : 2020-10-15DOI: 10.21741/9781644900970-6
A. Mondal
Catalysis plays a significant role in improving the catalytic processes to enhance efficiency of chemical transformations by reducing wastes. The research on catalysis con-temporarily emerged as one of the pioneered research in modern chemistry. In the last few years, nanocatalysis has become an emerging area of science and technology owing to their exceptional potential effects in catalysis and selectivity. On the nano-level, the nanostructured materials possessed different size, which rendered different surface area, that conveys the exclusive assets to nanocatalysts compared to their bulk counterpart. In this chapter, we emphasise on the fundamental understanding of different nanocatalysts and how they catalyse catalytic reactions.
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Pub Date : 2020-10-15DOI: 10.21741/9781644900970-5
M. Raghasudha
Co x Ni 0.5 Cd 0.5- x Fe 2 O 4 ( x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5) nanoferrites were synthesized by citrate-gel auto combustion method. Antimicrobial study was tested on Gram-negative bacteria and Gram-positive bacteria by adopting disc-diffusion agar method. The prepared nanoferrites show excellent antimicrobial function with a zone of inhibition of 10-12 mm against E. coli, 5-7 mm against K. pneumonia, 9-12 mm against B. subtilis and 5-7 mm against S. aureus. Inhibition of the growth was ascertained with reference to Ampicillin, a standard antibacterial drug, that acts as positive control. The antibacterial properties of the prepared ferrites bid great challenges in biomedical and pharmaceutical applications.
采用柠檬酸凝胶自燃法合成了 Co x Ni 0.5 Cd 0.5- x Fe 2 O 4 （x = 0.0、0.1、0.2、0.3、0.4、0.5）纳米铁氧体。采用碟片扩散琼脂法对革兰氏阴性菌和革兰氏阳性菌进行了抗菌研究。所制备的纳米铁具有出色的抗菌功能，对大肠杆菌的抑制区为 10-12 毫米，对肺炎双球菌的抑制区为 5-7 毫米，对枯草杆菌的抑制区为 9-12 毫米，对金黄色葡萄球菌的抑制区为 5-7 毫米。抑制生长的效果参照了作为阳性对照的标准抗菌药物氨苄西林。所制备铁氧体的抗菌特性给生物医学和制药应用带来了巨大挑战。
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