State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Xindu Rd. 8, Chengdu 610500, China; The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Xindu Rd. 8, Chengdu 610500, China; Insititute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Xindu Rd. 8, Chengdu 610500, China; The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Xindu Rd. 8, Chengdu 610500, China.
J Hazard Mater. 2016 Apr 15;307:163-72. doi: 10.1016/j.jhazmat.2015.12.072. Epub 2016 Jan 6.
Bi2O2CO3 nanosheets with exposed {001} facets were prepared by a facile room temperature chemical method. Due to the high oxygen atom density in {001} facets of Bi2O2CO3, the addition of cetyltrimethylammonium bromide (CTAB) does not only influence the growth of crystalline Bi2O2CO3, but also modifies the surface properties of Bi2O2CO3 through the interaction between CTAB and Bi2O2CO3. Nitrogen from CTAB as dopant interstitially incorporates in the Bi2O2CO3 surface evidenced by both experimental and theoretical investigations. Hence, the formation of localized states from NO bond improves the visible light absorption and charge separation efficiency, which leads to an enhancement of visible light photocatalytic activity toward to the degradation of Rhodamine B (RhB) and oxidation of NO. In addition, the photocatalytic NO oxidation over Bi2O2CO3 nanosheets was successfully monitored for the first time using in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS). Both bidentate and monodentate nitrates were identified on the surface of catalysts during the photocatalytic reaction process. The application of this strategy to another relevant bismuth based photocatalyst, BiOCl, demonstrated that surface interstitial N doping could also be achieved in this case. Therefore, our current route seems to be a general option to modify the surface properties of bismuth based photocatalysts.
采用简便的室温化学法制备了暴露{001}面的 Bi2O2CO3 纳米片。由于 Bi2O2CO3{001}面的氧原子密度较高，十六烷基三甲基溴化铵（CTAB）的添加不仅影响了 Bi2O2CO3 的结晶生长，而且通过 CTAB 与 Bi2O2CO3 的相互作用，改变了 Bi2O2CO3 的表面性质。实验和理论研究都表明，CTAB 中的氮作为掺杂剂间隙掺入 Bi2O2CO3 表面。因此，NO 键形成的局域态提高了可见光吸收和电荷分离效率，从而提高了可见光光催化活性，实现了 Rhodamine B（RhB）的降解和 NO 的氧化。此外，首次使用原位漫反射红外傅里叶变换光谱（DRIFTS）成功监测了 Bi2O2CO3 纳米片上的光催化 NO 氧化。在光催化反应过程中，在催化剂表面上鉴定出了双齿和单齿硝酸盐。该策略在另一种相关的铋基光催化剂 BiOCl 中的应用表明，在这种情况下也可以实现表面间隙 N 掺杂。因此，我们目前的方法似乎是一种通用的选择，可以改变铋基光催化剂的表面性质。
