S型异质结NiTiO<sub>3</sub>/CdS光催化页岩气返排废水产氢性能研究

刘雪妍; 谭文雯; 王婧茹; 张茹; 徐龙君; 刘成伦

doi:10.19906/j.cnki.JFCT.2023074

S型异质结NiTiO₃/CdS光催化页岩气返排废水产氢性能研究

doi: 10.19906/j.cnki.JFCT.2023074

刘雪妍^{1, 2,},
谭文雯^{1, 2,},
王婧茹^1,,
张茹^{1, 2,},
徐龙君^{1, 2, ,},
刘成伦^{1, 2,}

1.
重庆大学煤矿灾害动力学与控制全国重点实验室, 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)资助

详细信息

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

中图分类号: X703.1
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- 文章访问数: 20
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- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2023-07-09
- 修回日期: 2023-09-19
- 录用日期: 2023-09-19
- 网络出版日期: 2023-10-12

Photocatalytic decomposition of shale gas flowback water producing hydrogen by S-scheme heterojunction NiTiO₃/CdS

LIU Xue-yan^{1, 2
,},
TAN Wen-wen^{1, 2
,},
WANG Jing-ru^1
,,
ZHANG Ru^{1, 2
,},
XU Long-jun^{1, 2
, ,},
LIU Cheng-lun^{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 National Natural Science Foundation of China (52174157).

摘要

摘要: 构筑S型异质结形成具有强还原性的光催化材料是提高光催化性能的有效策略。本文通过简单水热法制备出具有S型异质结构的NiTiO₃/CdS光催化材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、比表面积分析及紫外-可见漫反射光谱（UV-Vis DRS）等手段对光催化剂进行表征，并通过光催化页岩气返排废水产氢实验测试其产氢性能。结果表明，NiTiO₃和CdS二者成功复合，15% NiTiO₃/CdS表现出最强的产氢性能（1568.9 µmol·g⁻¹·h⁻¹）和优异的循环利用潜力。本研究对开发高效稳定的S型异质结光催化剂、废水的多效利用及缓解能源短缺具有重要意义。
- 钛酸镍/硫化镉 /
- 异质结 /
- 光催化产氢 /
- 页岩气返排废水
Abstract: Constructing S-scheme heterojunction is an effective strategy to form photocatalytic materials with strong reduction property and improve photocatalytic performance. In this paper, NiTiO₃/CdS photocatalytic materials with S-scheme heterostructures were prepared by a simple hydrothermal method. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), specific surface area analysis and Ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS). The hydrogen production performance was tested by the photocatalytic hydrogen production experiment from shale gas flowback water. The results showed that NiTiO₃ and CdS were successfully compounded. In addition, 15% NiTiO₃/CdS showed the optimum hydrogen production performance (1568.9 µmol·g⁻¹·h⁻¹), and excellent recycling potential. This work is of great significance for the exploration of efficient and stable photocatalysts with S-scheme heterojunctions, the efficient utilization of wastewater and the alleviation of energy shortages.
- nitio₃/cds /
- heterojunction /
- photocatalytic hydrogen production /
- shale gas flowback water

HTML全文

图 1 NTO/CS光催化剂产氢性能

Figure 1 Hydrogen production performance of NTO/CS: (a) H₂ production yield and (b) rate constant

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图 2 NTO，CS和NTO/CS的XRD谱图

Figure 2 XRD spectra of NTO, CS and NTO/CS

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图 3 样品的SEM图、晶粒尺寸分布图及NTO/CS-15的TEM、HRTEM图片

Figure 3 SEM for (a) NTO, (b) CS and (c) NTO/CS-15, (d) Grain size distribution images of samples, (e) TEM and (f) HRTEM images of NTO/CS-15

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图 4 NTO，CS和NTO/CS-15的XPS能谱图

Figure 4 XPS spectra for NTO, CS and NTO/CS-15: (a) full spectrum, (b) Ni 2p, (c) Ti 2p, (d) O 1s, (e) Cd 3d and (f) S 2p

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图 5 样品氮气吸附-脱附曲线（内含孔径分布曲线）

Figure 5 N₂ adsorption-desorption isotherms and pore size distribution curves (inset) for CS and NTO/CS-15

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图 6 NTO，CS和NTO/CS-15的光学性能测试

Figure 6 (a) UV-DRS and (b) band gap energy for NTO, CS and NTO/CS-15

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图 7 NTO，CS和NTO/CS-15的电化学性能测试

Figure 7 (a) EIS and (b) TPR for NTO, CS and NTO/CS-15

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图 8 NTO/CS-15的循环实验产氢曲线及循环前后XRD谱图

Figure 8 (a) Stability test and (b) XRD patterns before and after 5 recycles for NTO/CS-15

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图 9 NiTiO₃/CdS的光催化机理

Figure 9 Photocatalytic mechanism over NiTiO₃/CdS

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