最近刚接触酸刻蚀，不是很明白？

The as-prepared ultrathin graphitic carbon coated MnO hybrids were etched in 0.1 M H 2 SO 4 for 24 h to yield the MnO- m -N-C nanocomposite. 酸刻蚀作用是除去一些MnO，产生介孔碳吗？为什么除去一些MnO 1UI2ZW8U]3IG35IH%VU)(D9.jpg