g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation
Abstract
:1. Introduction
2. Experiment and Methods
2.1. Materials and Equipment
2.2. Preparation
2.3. Indoor Exhaust Gas Purification Step and Evaluation Method
- (1)
- The g-C3N4/CeO2 photocatalytic material was prepared by following the above steps, and 3 g of g-C3N4/CeO2 were weighed and then spread evenly on clean A4 paper;
- (2)
- The exhaust purification system was connected in sequence. The exhaust purification system in this work is shown in Figure 1. Firstly, the DTN220B-NO2 portable nitrogen dioxide detector was put into the reaction box, and a small fan was turned on to keep gas flowing. Then, the photocatalytic material was put into the reaction box, which was closed tightly. Secondly, the reaction chamber was covered with a curtain to prevent light from entering. Then, the air inlet valve was opened, and the air outlet valve was closed. The engine was connected to the air inlet and injected exhaust gas into the reaction box.
- (3)
- The NHA-506 (5G) car exhaust gas analyzer (Nanhua Instrument Co., Ltd., Foshan, China) was turned on. After injecting for a period of time, the automobile exhaust gas analyzer was used to test the concentration of various components in the exhaust gas. When a certain concentration was reached, the intake valve was closed and the gasoline engine was turned off. The UV or incandescent lamp was turned on and the test was started.
- (4)
- The concentrations of NO, NO2, CO, CO2 and HC were recorded every 10 min. A total of 60 min and 7 groups of data were recorded.
2.4. Error Correction of Exhaust Gas Purification Test
2.5. Analysis of Exhaust Gas Degradation Efficiency
2.6. Microscopic Test
3. Results and Discussion
3.1. Degradation Principle of g-C3N4/CeO2
3.2. Degradation Efficiency of g-C3N4/CeO2
3.3. Micro Analysis
3.3.1. UV-Vis Analysis
3.3.2. FI-TR Analysis
3.3.3. XRD
3.3.4. TG-DSC
3.3.5. SEM
3.3.6. XPS
4. Conclusions
- (a)
- The exhaust gas purification efficiency of the g-C3N4/CeO2 composite under natural light irradiation was higher than that under ultraviolet light. The best mass ratio preparation of g-C3N4/CeO2 was 0.75.
- (b)
- The degradation efficiencies of the g-C3N4/CeO2 composite for HC, CO, CO2 and NOX in 60 min were 7.59%, 12.10%, 8.25% and 36.82%, respectively. Under natural light irradiation, the degradation efficiencies for HC, CO, CO2 and NOX in the 60 min were 15.88%, 16.22%, 10.45% and 40.58%, respectively.
- (c)
- The microstructure characterized the crystal structure and micro-morphology of g-C3N4/CeO2 composite. This indicated that g-C3N4/CeO2 heterostructure nanocomposite was successfully prepared.
Author Contributions
Funding
Conflicts of Interest
References
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Device Name | Model | Factory |
---|---|---|
Alumina crucible | Φ100 mL | Shanghai Kesheng Ceramics Co., Ltd. (Shanghai, China) |
Electronic balance | FA2004B | Shanghai Jingke Tianmei Scientific Instrument Co., Ltd. (Shanghai, China) |
Muffle furnace | 100 mL | Shanghai Pudong Physical Optical Instrument Factory (Shanghai, China) |
Planetary ball mill | 450 rpm | Changsha Miqi Equipment Co., Ltd. (Changsha, China) |
Magnetic stirrer | 0–2400 r/min | Changzhou Deke Instrument Manufacturing Co., Ltd. (Changzhou, China) |
Electric centrifuge | 0–4000 rpm | Jintan District Xicheng Xinrui Instrument Factory (Changzhou, China) |
Reagent Name | Model | Factory |
---|---|---|
Dicyandiamide | AR | Tianjin Fuchen Chemical Reagent Factory (Tianjin, China) |
Cerium Oxide | AR | Tianjin Kemiou Chemical Reagent Co., Ltd. (Tianjin, China) |
Exhaust Gas Composition | 0–10 min | 10–20 min | 20–30 min | 30–40 min | 40–50 min | 50–60 min |
---|---|---|---|---|---|---|
HC (ppm) | 10 | 6 | 8 | 6 | 6 | 5 |
CO (%) | 0.1 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 |
CO2 (%) | 0.1 | 0.1 | 0.1 | 0.1 | 0.08 | 0.08 |
NOX (ppm) | 8 | 5 | 6 | 2 | 1 | 1 |
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Cui, S.; Xie, B.; Li, R.; Pei, J.; Tian, Y.; Zhang, J.; Xing, X. g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation. Materials 2020, 13, 1274. https://doi.org/10.3390/ma13061274
Cui S, Xie B, Li R, Pei J, Tian Y, Zhang J, Xing X. g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation. Materials. 2020; 13(6):1274. https://doi.org/10.3390/ma13061274
Chicago/Turabian StyleCui, Shengchao, Baowen Xie, Rui Li, Jianzhong Pei, Yefei Tian, Jiupeng Zhang, and Xiangyang Xing. 2020. "g-C3N4/CeO2 Binary Composite Prepared and Its Application in Automobile Exhaust Degradation" Materials 13, no. 6: 1274. https://doi.org/10.3390/ma13061274