Ni-MOF/Zn<sub>0.5</sub>Cd<sub>0.5</sub>S合成及其光催化废水制氢研究

蒋灶; 徐龙君; 刘成伦

doi:10.19906/j.cnki.JFCT.2023051

Ni-MOF/Zn_0.5Cd_0.5S合成及其光催化废水制氢研究

doi: 10.19906/j.cnki.JFCT.2023051

蒋灶^1,,
徐龙君^1, ,,
刘成伦^{1, 2,}

1.
重庆大学煤矿灾害动力学与控制国家重点实验室, 重庆 400044
2.
重庆大学化学化工学院, 重庆 400044

基金项目: 国家自然科学基金（52174157）和重庆市中小学生创新人才培养计划（CY220109）资助

详细信息

通讯作者:
Tel：13752820583, E-mail：xulj@cqu.edu.cn

中图分类号: O643.36
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- 文章访问数: 48
- HTML全文浏览量: 32
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2023-04-08
- 修回日期: 2023-06-06
- 录用日期: 2023-06-12
- 网络出版日期: 2023-06-27

Synthesis of Ni-MOF/Zn_0.5Cd_0.5S and the photocatalytic hydrogen production performance from wastewater

JIANG Zao^1
,,
XU Longjun^{1
, ,},
LIU Chenglun^{1, 2
,}

1.
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
2.
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

Funds: The project was supported by the National Natural Science Foundation of China (52174157) and Innovative Talents Training Program for Chongqing Primary and Secondary School Students (CY220109).

摘要

摘要: 为了提升Zn_0.5Cd_0.5S的光催化产氢性能，采用水热法制备了Ni-MOF改性Zn_0.5Cd_0.5S复合光催化剂，通过XRD、SEM、TEM、XPS等分析方法对制备样品的结构及光电化学性能进行了表征，并研究了其光催化垃圾渗滤液混合页岩气返排废水制氢的可行性及动力学特征。结果表明，Zn_0.5Cd_0.5S主要呈现为纳米颗粒状结构，Ni-MOF主要由长约为10 µm、宽约为9 µm的超薄方形片构成，当Ni-MOF与Zn_0.5Cd_0.5S复合时，Zn_0.5Cd_0.5S纳米颗粒沉积在Ni-MOF方形片的表面，粒径显著降低，减少了Zn_0.5Cd_0.5S纳米颗粒的团聚，光吸收范围出现了蓝移，但仍然具有优异的可见光响应能力。质量分数为15%的Ni-MOF/Zn_0.5Cd_0.5S在垃圾渗滤液混合页岩气返排废水中展现出最优的光催化产氢性能，模拟太阳光照射3 h产氢量达1887 µmol，产氢过程遵从零级反应动力学模型，产氢速率为685.9 µmol/h，约为Zn_0.5Cd_0.5S的5.7倍。
- Zn_0.5Cd_0.5S /
- Ni-MOF /
- 垃圾渗滤液 /
- 页岩气返排废水 /
- 光催化产氢
Abstract: In order to enhance the photocatalytic hydrogen production performance of Zn_0.5Cd_0.5S, Ni-MOF modified Zn_0.5Cd_0.5S composite photocatalyst was prepared by hydrothermal method. The structure and photoelectrochemical properties of the prepared samples were characterized by XRD, SEM, TEM, XPS and other analytical methods. The results show that Zn_0.5Cd_0.5S mainly presents a nano particle structure, and Ni-MOF is mainly composed of ultra-thin square sheets with a length of about 10 µm and a width of about 9 µm. When Ni-MOF is combined with Zn_0.5Cd_0.5S, the Zn_0.5Cd_0.5S nanoparticles deposit on the surface of the Ni-MOF square sheet, and the particle size is significantly reduced, reducing the aggregation of Zn_0.5Cd_0.5S nanoparticles. In addition, there is a blue shift in the light absorption range for the composite, but still excellent visible light response ability. In the landfill leachate mixed shale gas flowback wastewater, the 15% Ni-MOF/Zn_0.5Cd_0.5S shows the best photocatalytic hydrogen production performance. Under simulated sunlight, the hydrogen production after 3 h of illumination is up to 1887 µmol. The hydrogen production process satisfies the zero-level reaction, with a hydrogen production rate of 685.9 µmol/h, which is approximately 5.7 times as high as the hydrogen production rate of Zn_0.5Cd_0.5S.
- Zn_0.5Cd_0.5S /
- Ni-MOF /
- landfill leachate /
- shale gas flowback wastewater /
- photocatalytic hydrogen production

HTML全文

图 1 ZCS、Ni-MOF及NMZCS样品的XRD谱图

Figure 1 XRD patterns of ZCS, Ni-MOF and NMZCS samples

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图 2 样品的SEM及TEM照片

Figure 2 SEM and TEM images of the samples

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图 3 15NMZCS的XPS谱图

Figure 3 X-ray photoelectron spectra of 15NMZCS

(a): full spectrum; (b): Zn 2p; (c): Cd 3d; (d): S 2p; (e): Ni 2p; (f): O 1s; (g): C 1s; (h): N 1s high-resolution spectra.

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图 4 样品的紫外-可见漫反射谱图及禁带宽度

Figure 4 (a) UV-vis DRS spectra and (b) band gap of samples

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图 5 样品的光致发光光谱、交流阻抗谱及瞬时光电流图

Figure 5 (a) PL, (b) EIS and (c) TPR of samples

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图 6 NMZCS的光催化产氢曲线及动力学拟合曲线

Figure 6 Hydrogen production and kinetic fitting curves of NMZCS photocatalyst

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图 7 Ni-MOF的价带谱及NMZCS的光催化产氢机理

Figure 7 (a) The valence band spectrum of Ni-MOF and (b) photocatalytic mechanism of NMZCS

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