大学化学 >> 2020, Vol. 35 >> Issue (4): 66-71.doi: 10.3866/PKU.DXHX201912003

所属专题： 全国大学生化学实验创新设计竞赛

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半导体纳米复合材料的制备及其光电催化CO2还原

吴宁然, 田恩麟, 赵创源, 沈永雯(), 惠新平(), 景欢旺()   

  • 收稿日期:2019-12-02 录用日期:2019-12-16 发布日期:2020-02-11
  • 通讯作者: 沈永雯,惠新平,景欢旺 E-mail:sywlxy@lzu.edu.cn;huixp@lzu.edu.cn;hwjing@lzu.edu.cn

Preparation of Semiconductor Nanocomposites and Reduction of CO2 by Photoelectrocatalysis

Ningran Wu, Enlin Tian, Chuangyuan Zhao, Yongwen Shen(), Xinping Hui(), Huanwang Jing()   

  • Received:2019-12-02 Accepted:2019-12-16 Published:2020-02-11
  • Contact: Yongwen Shen,Xinping Hui,Huanwang Jing E-mail:sywlxy@lzu.edu.cn;huixp@lzu.edu.cn;hwjing@lzu.edu.cn

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摘要：

本实验通过模拟植物光合作用，设计制备了新颖的光电联合催化池3D-ZnO/Ni BiVO4/FTO，用电化学沉积法制备了泡沫镍负载的ZnO纳米棒光电阴极和BiVO4光电阳极，以0.1 mol·L-1 KHCO3水溶液作为电解质，1 mmol·L-1曙红Y为光敏剂，在-0.6 V硅太阳电池的电压下光电催化还原CO2得到了乙醇、乙酸和甲醇，总产率22.5 μmol·L-1·h-1·cm-2。实现了将太阳能贮存为化学能并减少了空气中的CO2，加深了学生对绿色化学和植物Calvin循环机理的理解。

关键词: 纳米半导体复合材料, 光电催化, 氧化锌, 人工光合成

Abstract:

This innovative comprehensive experiment mimics the photosynthesis of natural plants and designs a novel photoelectrocatalytic cell of 3D-ZnO/Ni BiVO4/FTO, in which, the ZnO-Ni photocathode prepared by electrodeposition and the BiVO4/FTO electrode were used as photocathode and photoanode, respectively. In 0.1 mol·L-1 KHCO3 aqueous solution, the photoelectrcatalytic CO2 reduction was carried out under -0.6 Volts powered by Si-solar cell in the presence of 1 mmol·L-1 Eosin Y, generating ethanol, acetate acid, and methanol in a total yield of 22.5 μmol·L-1·h-1·cm-2. This process can store solar energy to chemical energy and lessen CO2 in the atmosphere. The students might better understand the principle of green chemistry and the Calvin cycle of plant.

Key words: Nanosemiconductor composite, Photoelectrocatalysis, Zinc oxide, Artificial photosynthesis

MSC2000: 

  • G64