Low-temperature green synthesis of boron carbide using aloe vera

Abstract

The unique structural and physical properties of boron carbide, which make it suitable for a wide range of applications, demands the development of low-cost and green synthesis method. In the present work, the commonly available leaves of aloe vera are hydrothermally treated to form the carbon precursor for the synthesis of boron carbide. The morphological characterization reveals the porous nature of the precursor turning into a tubular structure upon boron carbide formation. The structural characterization by x-ray diffraction and other spectroscopic techniques such as Fourier transform infrared, Raman, photoluminescence and uv-visible near-infrared spectroscopy confirm the formation of boron carbide. The thermogravimetric analysis of the sample is found to exhibit good thermal stability above 500 • C. When the sample is annealed to 600 • C, boron carbide with phase purity is obtained, which is confirmed through XRD and FTIR analyses. The optical emission properties of the sample are studied through CIE plot and power spectrum. Compared with other natural precursors for boron carbide, the aloe vera is found to give a good yield above 50%.

Cost‐Effective Green Synthesis of Boron‐Rich Carbide Coatings for Infrared Windows and Night‐Vision Optics

“…The synthesis of BC by carbothermal reduction involves costlier equipment, toxic chemicals, and high temperature that hurt the ecosystem seriously. As a solution, we have proposed low‐temperature, cost‐effective, and green synthesis of BC using natural carbon precursors . In the current work, BC synthesized using the carbon precursor from castor oil is used for thin‐film preparation for IR window applications.…”

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

“…Ceramic materials are high strength materials and are chemically and thermally stable. Among ceramic materials, boron carbide (BC) nds widespread applicationslightweight armors, blast nozzles, ceramic bearing, brake linings, cutting tools, rocket propellant in the aerospace industry, and neutron absorber and shielding material in the nuclear industry [11][12][13][14] -due to its unique properties -greater hardness, high thermal and chemical stability, high neutron absorption cross-section, corrosion resistivity, and high melting point [15][16][17]. The lower fracture toughness of bulk BC is overcome by the 1D BC nanostructures having high elastic modulus [18].…”

Tailoring the morphology through alkali treatment: Dynamics of pattern formation

“…The quality and also the quantity of boron carbide depend upon the boron and carbon sources and techniques used for synthesis [7][8][9]. The commercial production of boron carbide includes carbothermic reduction of boric anhydride at higher temperature, i.e.…”