APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qingqing Zhu,Xiaojuan Zhang,Li Li,Chao Cheng,Jun Zheng,Youmin Guo,Chunchang Wang
This study focuses on enhancing the piezoelectric photocatalytic activity of BiFeO 3 through rare earth ion doping. By doping rare earth ions (La, Sm, Ce), the crystal structure, optical properties, and piezoelectric properties of BiFeO 3 are modified. The results show that the doping alters the rhombic structure, reduces the band gap, and enhances light absorption. A synergistic system combining ultraviolet − visible spectral irradiation and a high − frequency ultrasonic field was used. By monitoring the decomposition kinetics of Rhodamine B (RhB) and the generation pathways of free radicals, the multi-field coupling catalytic efficiency of piezoelectric semiconductor materials was systematically quantified. The doping significantly improves the degradation rate, with Bi 0.8 Sm 0.2 FeO 3 showing the best performance. The roles of different radicals in the degradation process are investigated, and the catalyst shows good stability and sustainability after multiple cycles.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 9
·1080-1086
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IF 2.507
Qianhong Shen,Zengyu You,Yang Yu,Tian Qin,Yuxuan Su,Hui Wang,Chunchun Wu,Fang Zhang,Hui Yang
Graphical A new carbon quantum dots/porous InVO 4 (CQDs/p-InVO 4 ) composite with enhanced photocatalytic activity was fabricated by loading carbon quantum dots on the surface of porous InVO 4 microspheres by a facile reflux process. A new carbon quantum dots/porous InVO 4 (CQDs/p-InVO 4 ) microsphere composite was synthesized by a facile reflux method. The relationship of structure and property of CQDs/p-InVO 4 was studied in detail. The results show that the as-prepared composite samples maintain the porous structure of the p-InVO 4 microspheres, while CQDs are uniformly loaded on the surface of the p-InVO 4 microspheres with an intimate interface. With this unique structure, the as-obtained samples exhibit enhanced photocatalytic degradation ability towards Rhodamine B (RhB) under visible-light irradiation. The synergistic effect of more active sites, increased visible-light absorption, and high separation efficiency of photogenerated electron–hole pairs is believed to be the reason for the enhanced photocatalytic activity.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2012
·
IF 4.173
Zhizhong Han,Lan Liao,Yueting Wu,Haibo Pan,Shuifa Shen,Jianzhong Chen
An oriented hierarchical ZnO flower-rod arrays (FRs) were prepared on indium doped tin oxide (ITO) glass using a facile solution-based method assisted with ZnO seed layer. And the as-prepared ZnO FRs/ITO was used as a convenient photocatalytic device that recycled without centrifugation. The results show that ZnO FRs are wurtzite phase with single crystalline grown along the [0 0 1] direction. The photoluminescence (PL) spectra illustrate that there are more oxygen vacancies on the surface of ZnO FRs compared with ZnO nanoparticles (NPs). The electrochemical methods using Rhodamine B (RhB) as electrolyte are also performed to study on the photodegradation mechanism where RhB is acted as photocatalytic substrate. For ZnO FRs, the higher photoinduced currents under UV irradiation and current density prove that the recombination of electron–hole pairs is restrained with oxygen vacancies, and the lower charge transfer resistance suggest that the charges could move quickly through ZnO oriented structures. Therefore, the photocatalytic activity is enhanced by ZnO FRs compared with ZnO NPs, and RhB degradation efficiency of ZnO FRs photocatalysts is nearly 100% by UV irradiation for 1.5 h.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2016
·
IF 4.179
Yinhua Jiang,Fan Li,Yan Liu,Yuanzhi Hong,Peipei Liu,Liang Ni
An interlayer structure hybrid photocatalyst of TiO 2 hollow sphere/g-C 3 N 4 (TOCN) has been successfully constructed via a facile impregnation process. The photocatalytic activity was evaluated by degrading Rhodamine B under visible irradiation. TOCN-2 with 33 wt.% g-C 3 N 4 had much higher photocatalytic efficiency (98.09%) than pure g-C 3 N 4 (18.62%) and TiO 2 hollow sphere (16.37%). Significantly, TOCN-2 showed much superior photocatalytic performance than TiO 2 nanoparticle/g-C 3 N 4 composite (53.16%), indicating the hollow morphology of TiO 2 also played a crucial role for RhB degradation. In TOCN system, both the morphology effect of TiO 2 and the synergistic effects between TiO 2 and g-C 3 N 4 resulted in significantly enhancing photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 26
·26259-26266
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IF 2.8
Lei Jinfeng,Deng Lei,Li Xinying,Xu Yongbin,Li Defu,Mu Changdao
TiO 2 shows great potential as ideal and powerful photocatalyst to degrade and eliminate harmful organic pollutants from waste water. It is desirable to prepare anatase TiO 2 with good aqueous solubility and photocatalytic activity for water decontamination. In this paper, water-soluble TiO 2 nanoparticles were successfully prepared using polytetramethylene ether glycol (PTMG), poly(ethylene glycol) (PEG), and poly(propylene glycol) (PPG) as stabilizers. The anatase phase of TiO 2 was well controlled by introduction of HCl in the reaction system. The results showed that all the polymer-capped TiO 2 were well dissolved in water and their aqueous solutions could maintain stable for more than 2 months. The photocatalytic activities of polymer-capped TiO 2 were evaluated by monitoring the degradation of Rhodamine B (RhB) with Degussa P25 as a control. The results showed that all the polymer-capped TiO 2 presented better photocatalytic activity than that of Degussa P25. PTMG capped TiO 2 exhibited the longest average lifetime of charge carriers, indicating the lowest charge recombination rate. Thus, PTMG capped TiO 2 presented the best photocatalytic activity. In summary, PTMG, PEG, and PPG can be used as stabilizers to prepare water-soluble TiO 2 . PTMG is an ideal stabilizer for the synthesis of water-soluble TiO 2 with good photocatalytic activity.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 99
·96861-96869
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IF 3.289
Lei Shi,Jinling Gou,Lin Liang,Fangxiao Wang,Jianmin Sun
A g-C3N4/Ag2WO4 composite photocatalyst was synthesized via a simple co-precipitation method at room temperature and was thoroughly characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, UV-visible diffuse reflectance spectroscopy and photoluminescence spectroscopy. The characterization results indicated that upon depositing Ag2WO4 onto the surface of g-C3N4 its morphology changed from primary rod-like particles to globular nanoparticles and its phase changed from α-type to β-type Ag2WO4. When the composite was used as the catalyst in the photodegradation of Rhodamine B, 40%-g-C3N4/Ag2WO4 exhibited the highest photocatalytic activity with its rate constant was about 10.8 times larger than that of pure g-C3N4 and 3.12 times larger than that of bare Ag2WO4. The enhanced photocatalytic activity can be attributed to the complementary potentials of the conduction bands and valence bands of g-C3N4 and Ag2WO4, which could not only realize the effective separation of photoinduced electron and hole pairs, but also retained the catalysts high stability and photocatalytic performance even after five recycles. Furthermore, a possible photocatalytic mechanism for the degradation of RhB over the g-C3N4/Ag2WO4 composite was proposed according to the results of active species quenching experiments.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yun Ji,Zhelin Song,Yu Xu,Yanlin Zhang
In this work, typical refractory pollutant Rhodamine B (RhB) was effectively degraded by Cu-Fe LDHs/Bi 2 WO 6 composite in the photo-Fenton process. The hydrothermal synthesis of Cu-Fe LDHs/Bi 2 WO 6 composite with ethylene glycol as reductant created the multivalent coexistence of the same metal element to achieve a self-circle redox reaction between metals. The photo-Fenton process by Cu-Fe LDHs/Bi 2 WO 6 incredibly eliminated the limitation of strong acidic pH value applied in the Fenton process. ∙OH generated by Cu-Fe LDHs/Bi 2 WO 6 was 5 times that of Cu-Fe LDHs during the photo-Fenton process. The complete degradation of RhB in the photo-Fenton process under the optimal conditions of initial pH= 6, 5 mmol/L of H 2 O 2 , and 1 g/L of Cu-Fe LDHs/Bi 2 WO 6 dosage was far more than 46% of RhB degradation in the photocatalytic process and 76% of RhB degradation in the Fenton process. Cu-Fe LDHs/Bi 2 WO 6 composite exhibited the excellent redox ability, electron transfer ability and reusability during the photo-Fenton process. The acceleration of Fe 3+ /Fe 2+ cycles in the Cu-Fe LDHs/Bi 2 WO 6 /H 2 O 2 /Vis system was mainly ascribable to the combination of efficient transfer of photogenerated electrons and self-circle redox of Fe 3+ /Cu + . It is expected for the promising application of multivalent bimetallic photo-Fenton catalysts and rendering enlightenments for photo-Fenton catalytic oxidation reaction.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
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