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Titanate nanotubes covalently bonded sulfamic acid as a heterogeneous catalyst for highly efficient conversion of levulinic acid into n-butyl levulinate biofuels
Covalently bonded sulfamic acid on the titanate nanotubes (TNTs-N(SO3H)-(CH2)2-NHSO3H) was designed and successfully fabricated by the post-synthesis modification method. The as-prepared catalyst was characterize...