Surface Properties of ZnS Nanoparticles: A Combined DFT and Experimental Study

被引:29
作者
Balantseva, Elena [1 ,2 ]
Berlier, Gloria [1 ,2 ]
Camino, Bruno [3 ]
Lessio, Martina [4 ]
Ferrari, Anna Maria [1 ,2 ]
机构
[1] Univ Turin, Dipartimento Chim, I-10125 Turin, Italy
[2] Univ Turin, NIS Nanostruct Interfaces & Surfaces Ctr, I-10125 Turin, Italy
[3] Univ London Imperial Coll Sci Technol & Med, Dept Chem, South Kensington London SW7 2AZ, England
[4] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA
关键词
ULTRAVIOLET-LIGHT SENSORS; ELECTRON-SPIN-RESONANCE; ZINC-SULFIDE; VISIBLE-LIGHT; CO ADSORPTION; OPTICAL-PROPERTIES; FT-IR; NANOSTRUCTURES; NANOCRYSTALS; TEMPERATURE;
D O I
10.1021/jp507963y
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Carbon monoxide adsorption on nanosize ZnS has been investigated by FTIR spectroscopy and periodic DFT calculations. FTIR experiments show that CO adsorption on the zinc sulfide nanoparticles gives rise to a single main v(CO) band indicating that the majority of the exposed sites are on the same surface. Computed adsorption energies (-0.244/0.207 eV for the low and high coverage, respectively) and stretching frequencies (2182/2172 cm(1)) of CO adsorbed at the most stable (110) ZnS surface are in excellent agreement with observations (v(CO) = 2190/2168 cm(1)). CO is weakly bound to the Zn2+ Lewis acid surface site mainly through electrostatic interaction and a small contribution from s donation. The strength of surface Lewis sites in ZnS is lower with respect to ZnO.
引用
收藏
页码:23853 / 23862
页数:10
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