Citation: WU Qian, WENG Wei-Zheng, LIU Chun-Li, HUANG Chuan-Jing, XIA Wen-Sheng, WAN Hui-Lin. Effect of Preparation Methods on Photo-Induced Formation of Peroxide Species on Nd₂O₃[J]. Acta Physico-Chimica Sinica, ;2017, 33(10): 2064-2071. doi: 10.3866/PKU.WHXB201705103 shu

Effect of Preparation Methods on Photo-Induced Formation of Peroxide Species on Nd₂O₃

State Key Laboratory of Physical Chemistry of Solid State Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China

Received Date: 27 February 2017
Revised Date: 24 April 2017

Fund Project: The project was supported by the National Key Basic Research Program of China (973) (2013CB933102), National Natural Science Foundation of China (21173173, 21473144), and Program for Innovative Research Team in University, China (IRT_14R31).

Three Nd₂O₃ samples with cubic phase being the main component phase, denoted as Nd₂O₃-H, Nd₂O₃-HT, and Nd₂O₃-C, were synthesized by hydrolysis, hydrothermal, and combustion methods, respectively. A comparative study of the photo-induced formation of peroxide species on the three Nd₂O₃ samples was carried out using Raman spectroscopy with a 325 nm laser as the excitation source. After irradiation with the laser of the Raman spectrometer at room temperature in air, peroxide species was detected in all Nd₂O₃ samples. However, the rate of peroxide formation over Nd₂O₃-C was much greater than that over the other two samples. This observation can be explained by the differences in the structure and basicity of the surface lattice oxygen (O^2-) species of the samples. As evidenced by the results of O₂- and CO₂-temperature-programmed desorption (TPD) characterizations, the Nd₂O₃-C sample contains greater number of surface lattice oxygen (O^2-) species with low coordination numbers than the other two samples. Moreover, the basicity of the surface O^2- species in Nd₂O₃-C is stronger than that in the Nd₂O₃-H and Nd₂O₃-HT samples. Both these factors are in favor of the reaction of lattice oxygen with molecular oxygen to generate peroxide species under photo irradiation.
- Nd₂O₃,
- Preparation method,
- Photo-induced,
- Peroxide species,
- Lattice oxygen
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Effect of Preparation Methods on Photo-Induced Formation of Peroxide Species on Nd2O3

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Effect of Preparation Methods on Photo-Induced Formation of Peroxide Species on Nd₂O₃