Ahmad Shakiaz, Su Xintai, Yang Chao, Wang Xinyu, Liu Xuemin, Wang Jide
Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China; Engineering and Technology Research Center for Environmental Nanomaterials, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
J Hazard Mater. 2019 Jun 5;371:213-223. doi: 10.1016/j.jhazmat.2019.02.111. Epub 2019 Mar 1.
Here, hierarchical nanostructures of clay-based hybrids were synthesized via a space-confined growth of layered basic zinc acetate (LBZA) nanosheets standing upright on both sides of bentonite clay platelets. These thermally instable LBZA nanosheets were thermally decomposed and fragmented into ZnO nanoparticles well-dispersed on bentonite platelets. The morphology and structure of LBZA/bentonite and ZnO/bentonite was characterized by SEM, TEM, XRD, TG-DSC, and FTIR. Surface density of LBZA nanosheets on bentonite platelets was simply controlled by tuning the amount of zinc acetate. LBZA/bentonite and ZnO/bentonite was used for the adsorption of Congo red (CR) and photodegradation of methyl orange (MO), respectively. Results showed that LBZA/bentonite exhibited higher adsorption capacity for Congo red (CR) than original bentonite. In addition, bentonite-supported ZnO nanoparticles efficiently promoted the photodegradation of MO under UV light irradiation.
在此，通过层状碱式醋酸锌（LBZA）纳米片在膨润土粘土片两侧垂直生长的空间受限生长法，合成了粘土基杂化物的分级纳米结构。这些热不稳定的LBZA纳米片发生热分解并破碎成均匀分散在膨润土片上的ZnO纳米颗粒。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、热重-差示扫描量热法（TG-DSC）和傅里叶变换红外光谱（FTIR）对LBZA/膨润土和ZnO/膨润土的形态和结构进行了表征。通过调节醋酸锌的用量可简单地控制LBZA纳米片在膨润土片上的表面密度。LBZA/膨润土和ZnO/膨润土分别用于刚果红（CR）的吸附和甲基橙（MO）的光降解。结果表明，LBZA/膨润土对刚果红（CR）的吸附能力高于原始膨润土。此外，膨润土负载的ZnO纳米颗粒在紫外光照射下有效地促进了甲基橙（MO）的光降解。
