The synthesized CD ns-TiO_2 films absorb well into the visible light to near infrared region up to 800 nm and have narrower band gap energy of 1.98(628 nm),1.64(758 nm)and 1.26 eV(958 nm).
CD ns-TiO_2复合膜将吸收光谱从可见区扩大到800nm的近红外区,并有三个比较小的带隙:1.98(628nm)、1.64(758nm)、1.26(958nm)eV。