Synthesis of Low-Density, Carbon-Doped, Porous Hexagonal Boron Nitride Solids

Autor(es)

Gautam, Chandkiram ^{[1, 2]} ; Tiwary, Chandra Sekhar ^[1] ; Lose, Sujin ^{[1, 3]} ; Brunetto, Gustavo ^{[4, 1]} ; Ozden, Sehmus ^[1] ; Vinod, Soumya ^[1] ; Raghavan, Prasanth ^[1] ; Biradar, Santoshkumar ^[1] ; Galvao, Douglas Soares ^[4] ; Ajayan, Pulickel M. ^[1]

Afiliação do(s) autor(es)

^[1] Rice Univ, Dept Mat Sci & Nano Engn, Houston, TX 7005 - USA

^[2] Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh - India

^[3] Madurai Kamaraj Univ, Sch Phys, Madurai 625021, Tamil Nadu - India

^[4] Univ Estadual Campinas, Dept Appl Phys, BR-13083959 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACS NANO; v. 9, n. 12, p. 12088-12095, DEC 2015.
• Citações Web of Science: 29

Resumo

Here, we report the scalable synthesis and characterization of low-density, porous, three-dimensional (3D) solids consisting of two-dimensional (2D) hexagonal boron nitride (h-BN) sheets. The structures are synthesized using bottom-up, low-temperature (similar to 300 degrees C), solid-state reaction of melamine and boric acid giving rise to porous and mechanically stable interconnected h-BN layers. A layered 3D structure forms due to the formation of h-BN, and significant improvements in the mechanical properties were observed over a range of temperatures, compared to graphene oxide or reduced graphene oxide foams. A theoretical model based on Density Functional Theory (DFT) is proposed for the formation of h-BN architectures. The material shows excellent, recyclable absorption capacity for oils and organic solvents. (AU)

• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs