Novel insights into adsorption mechanism of benzohydroxamic acid on lead (II)-activated cassiterite surface: An integrated experimental and computational study
Novel insights into adsorption mechanism of benzohydroxamic acid on lead (II)-activated cassiterite surface: An integrated experimental and computational study
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对苯并异羟肟酸在铅（II）活化锡石表面吸附机制的新见解：综合实验和计算研究
DOI：
10.1016/j.mineng.2018.04.012
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发表时间：
2018-06
影响因子：
4.8
通讯作者：
an
中科院分区：
文献类型：
--
作者：
Tian Mengjie;Zhang Chenyang;Han Haisheng;Liu Runqing;Gao Zhiyong;Chen Pan;He Jianyong;Hu Yuehua;Sun Wei;Yuan D;an
通过微浮选实验，研究了Pb2+离子对锡石(SnO2)浮选性能的影响。浮选结果表明，加入Pb2+离子后，锡石的可浮性明显改善。通过吸附实验、Zeta电位测量、X射线光电子能谱分析和第一性原理密度泛函理论计算，进一步探讨了BHA在钝化和铅活化锡石表面的吸附行为和机理。实验和计算结果一致地表明，吸附的铅原子可以与锡石表面两个羟基上的两个氧原子配位。BHA分子可与一个铅离子吸附在锡石表面形成两个配位键，形成一个五元络合环。所提出的吸附机理可以推广到绝大多数界面组装体系。
Using microflotation experiments, this study investigated the effect of Pb2+ions on flotation performance of cassiterite (SnO2) by using benzohydroxamic acid (BHA) as collector. Flotation results showed that floatability of cassiterite significantly improved after addition of Pb2+ion to the process. Adsorption behaviour and mechanism of BHA on the inactivated and Pb-activated cassiterite surface were further explored by adsorption experiments, zeta potential measurements, X-ray photoelectron spectroscopy analysis and first-principle density functional theory calculations. Experimental and computational results consistently suggested that the adsorbed Pb atoms can coordinate with two O atoms of the two hydroxyl groups on the cassiterite surface. BHA molecules can form two coordination bonds with one Pb ion adsorbed on the cassiterite surface, resulting in a five-membered chelating ring. The proposed adsorption mechanism can be extended to the vast majority of interface assembly systems.
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影响因子：
3
作者：
Grimme, Stefan
通讯作者：
Grimme, Stefan
影响因子：
4.4
作者：
K. Peterson;R. Kendall;T. H. Dunning
通讯作者：
K. Peterson;R. Kendall;T. H. Dunning
DOI：
10.1107/s0108768197001468
发表时间：
1997-06-01
影响因子：
1.9
作者：
Bolzan, AA;Fong, C;Howard, CJ
通讯作者：
Howard, CJ
影响因子：
2.5
作者：
Peng, Huiqing;Luo, Wen;Liu, Yike
通讯作者：
Liu, Yike
影响因子：
4.2
作者：
Ren, Liuyi;Qiu, Hang;Feng, Jian
通讯作者：
Feng, Jian