Effect of triangle vacancy on thermal transport in boron nitride nanoribbons

► The triangle vacancy induces antiresonant dips in the spectrum of Z-BNNRs. ► The boron-terminated triangle vacancy causes antiresonant zero-transmission dip. ► The number of zero-transmission dip increases with the size of triangle vacancy. ► As for A-BNNRs with triangle vacancy, a resonant peak is found in the transmission. ► Thermal conductance of BNNRs decreases linearly with increasing the vacancy size.