4 research outputs found
Về chủ nghĩa xã hội mang đặc sắc Trung Quốc : Quan điểm của các chuyên gia Trung Quốc
129 tr.; 20 cm
A Bulk Boron-Based Photocatalyst for Efficient Dechlorination: K<sub>3</sub>B<sub>6</sub>O<sub>10</sub>Br
Nanoparticles of a borate nonlinear
optical material, K<sub>3</sub>B<sub>6</sub>O<sub>10</sub>Br (KBB),
have been fabricated and demonstrated
excellent catalytic activity in UV-induced dechlorination of chlorophenols,
which are typical persistent organic pollutants. The obtained dechlorination
efficiency is 2 orders of magnitude higher than that of a commercial
P25 TiO<sub>2</sub> catalyst under UV (λ > 254 nm) light
irradiation.
The noncentrosymmetric structure of KBB gives rise to an intrinsic
large polarization effect as evidenced by Kelvin probe force microscopy,
and the polarization promotes separation of photogenerated electron–hole
pairs, leading to efficient cleavage of chlorophenols into small molecular
fragments and dissociative Cl<sup>–</sup> anions. This work
suggests that nonlinear materials open a new window for designing
efficient photocatalysts