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MATERIALS CHEMISTRY AND PHYSICS · 2014 · IF 2.129

The synthesis of hollow CuInS2 microspheres with hierarchical structures

Xiaozhen Geng,Lanlan Zhai,Jianli Hu,Lulin Wang,Zhiyong Xiong,Chao Zou,Lijie Zhang,Yun Yang,Shaoming Huang

Hollow CuInS 2 microspheres with hierarchical structures were synthesized via solution-based method. The detailed HRTEM and XRD results demonstrated the presence of zincblende CuInS 2 microspheres trunks and wurtzite nanobelts attached onto the microspheres. As it was found, oxygen had decisive effect on the formation of CuInS 2 microspheres. Detailed investigation indicated the growth of hierarchical structured CuInS 2 microspheres simultaneously underwent two different mechanisms, phase transformation for zincblende CuInS 2 microspheres and catalytic growth for wurtzite CuInS 2 nanobelts.

CAS / MDL: 64-17-5

研究领域: 材料科学 · 纳米技术

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JOURNAL OF HAZARDOUS MATERIALS · 2019 · IF 7.65

Influence of pH and DO on the ofloxacin degradation in water by UVA-LED/TiO2 nanotube arrays photocatalytic fuel cell: mechanism, ROSs contribution and power generation

Xiangyu Chen,Juanjuan Yao,Bin Xia,Jingye Gan,Naiyun Gao,Zhi Zhang

The influence of pH and dissolved oxygen (DO) on the degradation of ofloxacin (OFX) in water by UVA-LED/TiO 2 nanotube arrays photocatalytic fuel cell (UVA-LED/TNA PFC) was investigated. The degradation pathway depended on the location of OFX frontier orbital with different ionization states and the role of reactive oxidative species (ROSs) played with varied pH and DO values. In presence of DO, the quencher tests revealed that O 2 − played a key role at pH 3.0, 7.0 and 11.0, while OH made its greatest contribution at pH 3.0 and the effect of h + was largely inhibited at pH 11.0. Hydroxylation for cationic OFX was more significant, while demethylation and piperazinyl ring oxidation for anionic OFX occurred more quickly compared to other forms. Besides, zwitterionic OFX underwent decarboxylation and combination of demethylation & hydroxylation more easily. Much higher power generation was observed in presence of DO at pH 7.0, probably due to the enhanced adsorption of OFX on the TNA, and DO could amplify the electric potential between the two electrodes. The degradation efficiencies were almost the same in presence or absence of DO, but the pathways were different and e- aq may replace O 2 - as the leading ROSs in absence of DO.

CAS / MDL: 75-05-8 106-51-4 56-81-5 67-63-0 82419-36-1 270573-71-2 75-65-0 338-70-5

研究领域: 环境科学 · 化学工程 · 材料科学

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The synthesis of hollow CuInS2 microspheres with hierarchical structures

Influence of pH and DO on the ofloxacin degradation in water by UVA-LED/TiO2 nanotube arrays photocatalytic fuel cell: mechanism, ROSs contribution and power generation