Sustainable Energy Technologies and Assessments
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2024
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IF 7.1
Linhao Wang,Dongqiang Lei,Yue Lv,Ruishen Guo,Ying Wu,Zhifeng Wang
In the study, a novel photodeposition one-step method for preparing Cu/TiO 2 photothermal catalysis was proposed to catalyze hydrogen production from glycerol. The biomass glycerol was used as a sacrificial agent to provide electrons for Cu 2+ loading during the catalyst preparation stage, and the remaining biomass glycerol was used directly as a reactant for photothermal-catalyzed hydrogen production. The catalysts were characterized using XRD, SEM, and TEM to obtain their phases and structures. The Cu/TiO 2 photodeposition process evaluation method based on image analysis and processing, and its experimental platform were established. The influence of parameters such as irradiation intensity, temperature, and catalyst concentration on the loading rate of photodeposited Cu 2+ was analyzed. The results demonstrated that enhancing the irradiation intensity, increasing the temperature, and decreasing the catalyst concentration can increase the loading rate of Cu. The Cu/TiO 2 photothermal catalyst prepared by this method showed a hydrogen production rate 1.6 times higher than that of the deposition and precipitation method under the same reaction conditions, which proved that the catalyst had a high photothermal catalysis hydrogen production activity. The hydrogen production rate at an irradiation intensity of 250 mW/cm 2 was 628.16 μmol/(g·h), which was 1.9 times that at an irradiation intensity of 100 mW/cm 2 . Both elevated temperature and increased irradiation intensity can significantly improve the photothermal catalysis glycerol hydrogen production activity.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Kunjuan Shao,Yanjie Wang,Muzaffar Iqbal,Lin Lin,Kai Wang,Xuehua Zhang,Meng He,Tao He
Modification of a wide-bandgap semiconductor with noble metals that can exhibit surface plasmon effect is an effective approach to make it responsive to the visible light . In this work, a series of cubic and all-edge-truncated SrTiO 3 with and without thermal pretreatment in air are modified by Ag nanoparticles via photodeposition method. The crystal structure, morphology, loading amount of Ag nanoparticles, and optical properties of the obtained Ag-SrTiO 3 nanomaterials are well characterized by powder X-ray diffraction, scanning microscope, transmission electron microscope, energy disperse X-ray spectroscopy, ICP-MS and UV–vis diffuse-reflection spectroscopy. The loading amount and size of the Ag nanoparticles can be controlled to some extent by tuning the photodeposition time via growth-dissolution mechanism. The Ag nanoparticles are inclined to deposit on different locations on the surface of cubic and truncated SrTiO 3 with and without thermal pretreatment. The resultant SrTiO 3 modified by Ag nanoparticles exhibits visible light activity for photocatalytic reduction of CO 2 , which is closely related to the oxygen vacancy induced by thermal pretreatment, size and amount of Ag nanoparticles. Accordingly, there is an optimized photodeposition time for the synthesis of the photocatalyst that exhibits the highest photocatalytic activity.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
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2022
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IF 4.654
Yongshuo Yang,Qiqi Zhang,Xinmin Yang,Huilin Hu,Lequan Liu,Jinhua Ye,Defa Wang
WO3 is one of the most promising photocatalysts with a suitable energy band structure for water oxidation; however, the quick recombination of photoinduced charge carriers seriously limits the photocatalytic efficiency. Loading of suitable cocatalysts is considered as an effective method to significantly improve the photocatalytic activity. Herein, we used a facile one-step hydrothermal method and a “hydrothermal + photodeposition” method to synthesize xCo3O4/WO3 (x = 0.2, 0.4, 0.8) and yCoOOH/WO3 (y = 2, 3, 4), respectively. We found that, in comparison with the pristine WO3, both xCo3O4/WO3 and yCoOOH/WO3 exhibited remarkably increased photocatalytic O2 evolution activities owing to the loading of two Co-based cocatalysts Co3O4 and CoOOH, respectively. Moreover, the optimal O2 evolution rate achieved over 0.4Co3O4/WO3 (194 μmol·h–1) was ∼2.1 times that over 3CoOOH/WO3 (94 μmol·h–1). The superior photocatalytic O2 evolution activity of Co3O4/WO3 over CoOOH/WO3 could be attributed to the mixed valences of Co2+ and Co3+ in Co3O4, which was more favorable than CoOOH with the sole valence of Co3+ for promoting the separation and transfer of photoinduced electrons and holes. This work suggests a promising way to the development of noble-metal-free cocatalyst by using transition-metal oxide with mixed valence states for efficient photocatalytic water oxidation.
研究领域:
材料科学
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化学
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催化
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Mingyang Liu,Xuxiao Liu,Diqin Fu,Zhenrong Xie,Xiaolin Zou,Wuran Liu,Yueyang Yu,Jihui Wang,Hanqing Wang,Chaobo Tong,Zhiming Cheng,Songmei Wu,Kejian Ding,Yu Yu
Establishment of heteroatoms-participantly coordinating single atom (SA) configuration is placed high expectation for exceptional catalytic property. Meanwhile, simple technologies to construct SA site with low cost had also been pursued in long-term. Herein, we introduced a facile complexing agent-assistant photodeposition strategy for SA Ag-N 3 S 1 asymmetric site catalyst. The modification on substrate by heteroatom doping and the coexisting amine ligands’ complexation with silver cation are concurrently responsible for the construction of SA site. Attributed to modulation in electronic structure states, this Ag-N 3 S 1 site-decorated carbon nitride exhibited extremely strengthened photocatalytic hydrogen production ability. This exploration provides a promising universal strategy for the establishment in SA catalysts of high-efficiency in broader field.
研究领域:
材料化学
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光催化
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纳米催化
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能源材料
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物理化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）