JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yingqi Chen,Yufei Cheng,Junfeng Zhao,Wenwan Zhang,Jianhua Gao,Hui Miao,Xiaoyun Hu
Antimony sulfide (Sb 2 S 3 ) is a relatively abundant and environmentally friendly emerging photovoltaic material, which has been gradually applied in solar cells and photocatalysis. It has high light absorption capacity, but it suffers many deep-level defects and is prone to recombination of electron-hole pairs within itself. Here, by constructing the Sb 2 S 3 /CdIn 2 S 4 S-scheme heterojunction, we avoided the problem that electrons and holes cannot be separated and transported effectively due to many Sb 2 S 3 defects (more recombination centers), and improved its application in the field of photoelectrochemical water splitting. Meanwhile, in order to further improve the performance of Sb 2 S 3 /CdIn 2 S 4 photoelectrode, we introduced CdS energy platform between Sb 2 S 3 and CdIn 2 S 4 to form a Sb 2 S 3 /CdS/CdIn 2 S 4 cascaded S-scheme heterojunction. Compared with Sb 2 S 3 monomer, Sb 2 S 3 /CdS/CdIn 2 S 4 had higher absorbance intensity, IPCE value, ABPE value, and lower charge transfer resistance. In addition, the photocurrent density of the Sb 2 S 3 /CdS/CdIn 2 S 4 photoelectrode was about 4.20 mA/cm 2 (1.23 V vs. RHE), which was 1.3 times higher than that of the Sb 2 S 3 /CdIn 2 S 4 photoelectrode (3.29 mA/cm 2 ) and 3.2 times higher than that of monomer Sb 2 S 3 photoelectrode (1.32 mA/cm 2 ). This method offers new prospects for optimizing the performance of antimony chalcogenides photoelectrodes for photoelectrochemical water splitting.
研究领域:
材料科学
·
能源科学
·
光催化
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 22
·期 8
·2569-2577
·
IF 2.509
Li Liu-Ping,Liu Min,Zhang Wei-De
In this study, CdS/BiVO 4 heterojunction was successfully synthesized on the FTO-coated glass substrate through electrodeposition annealing followed by the second electrodeposition. First, the BiVO 4 films were prepared by electrodepositing nanoporous BiOI, and then, it was converted to BiVO 4 via annealing. Then, CdS was electrodeposited onto the BiVO 4 /FTO electrode. The obtained CdS/BiVO 4 heterojunction shows higher photoelectrochemical (PEC) performance and higher stability for PEC water splitting than the blank BiVO 4 films. The maximum photocurrent density of 6.6 mA cm −2 at 0.4 V vs Ag/AgCl was obtained for CdS/BiVO 4 /FTO, which is 4.2 times of that of the blank BiVO 4 /FTO (1.6 mA cm −2 ). The enhancement mechanism of the CdS/BiVO 4 /FTO heterojunction was investigated. The CdS achieves the efficient visible light absorption and forms heterostructure with BiVO 4 , which promotes the separation efficiency of photogenerated electron-hole pairs in BiVO 4 to enhance PEC performance of CdS/BiVO 4 heterojunction.
研究领域:
材料科学
·
能源科学
·
光催化
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Zhonghui Han,Xiaobin Yang,Xinnan Shi,Leyao Wu,Peng Hu,Haibo Fan,Feng Teng
The band structure of heterojunction plays an important role in the performance of actual application and can be adjusted by the change of preparation condition. Herein, Cu 2 O nanofilms with different band structures were prepared via electrodeposition method by modifying the solution environment. With the value of pH increased from 7 to 12, the conductivity of the Cu₂O nanofilms shifted from n-type to p-type. Combined the obtained Cu 2 O film with TiO 2 nanoarray, the Cu 2 O/TiO 2 heterojunction were prepared. The photoelectrochemical performance of the Cu 2 O/TiO 2 heterojunction was affected by the interfacial band structure. The T7 sample has higher photocurrent (450 μA) caused by the unique S-scheme band structure, the T11 sample with a p-n junction structure takes second place (225 μA). The n-n type II heterojunction has the lowest photocurrent (20 μA). The Fermi level of Cu 2 O nanofilm was affected by the type of defects, such as oxygen and copper vacancies, leading to changes of band structure at the interface between Cu 2 O and TiO 2 . The obtained result further illustrates the importance of energy band engineering, and provides route and sight for the development and application of Cu 2 O/TiO 2 heterojunction.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Ying Liu,Yu-Xiang Yu,Wei-De Zhang
Ni-doped Fe 2 O 3 thin films which were active photoanodes for water splitting were prepared by electrodeposition. By adjusting Ni molar ratios (Ni/(Ni + Fe)) in the electrolyte, Fe 2 O 3 thin films with various compositions of Ni could be tuned. The films were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, atomic absorption spectrophotometer, and UV–vis spectroscopy. The highest photo-response obtained from Fe 2 O 3 doped with 2.08 mol.% Ni is 1.5 mA/cm 2 at 0.65 V vs. Ag/AgCl in 1.0 M NaOH solution. The high performance is attributed to the improvement of charge transport properties and retardation of the charge recombination resulting from the dopants in the lattice. The optical absorption spectra of the films reveal that the bandgaps of the Ni-doped Fe 2 O 3 films are approximately 1.9–2.2 eV for all samples regardless of their doping level. XPS shows that the concentration of Ni is much higher on the surface than that in bulk.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Wen-Rong Fu,Jian Yang,Zong-Yan Zhao
This investigation sought to improve the photoelectrochemical performance of CuFeO 2 -based photocathodes by integrating copper foam (CF) substrate to leverage enhanced light trapping and electrical conductivity. CuFeO 2 powders, synthesized via a hydrothermal method, were deposited onto various substrates including fluorine-doped tin oxide (FTO), smooth copper foil, rough copper foil, and CF, to construct the photocathodes. The CF substrate, characterized by its rough surface and three-dimensional porous architecture, demonstrated a superior capacity for light trapping, substantially augmenting light absorption efficiency. Concurrently, the inherent conductivity of copper facilitated improved carrier collection and transfer rates. Consequently, the CF/CuFeO 2 photocathode achieved the highest carrier concentration and the most rapid interfacial electron transport rate among the tested configurations. This resulted in the CF/CuFeO 2 photocathode achieving the highest photocurrent density, approximately 3.64 μA/cm 2 , which represents a tenfold increase compared to the FTO/CuFeO 2 photocathode. Furthermore, the CF/CuFeO 2 photocathode showcased notable mechanical and chemical stability, underscoring its potential for enhanced photoelectrochemical applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinxin Wei,Jing Zhang,Lei Wang,Yan Bai,Jingwei Huang,Houde She,Qizhao Wang
To address the issue of inefficient charge transfer efficiency at the semiconductor/cocatalyst interface, we engineered a BiVO 4 /MgO/FeCo 2 O 4 array, incorporating a MgO interlayer. This design aimed to enhance the performance of photoelectrochemical (PEC) water splitting on BiVO 4 and FeCo 2 O 4 . The introduced interlayer efficiently hinders hole backflow, promoting unimpeded charge migration within the multi-hybrid structure. This, in turn, significantly reduces the recombination of electron-hole pairs. In addition, the BiVO 4 /MgO/FeCo 2 O 4 undergoes a low-temperature plasma treatment, resulting in super-hydrophilicity. This treatment enhances charge migration efficiency and fosters extensive contact between the electrolyte and electrode interfaces. Photoelectrochemical analysis demonstrates that H-BiVO 4 /MgO/FeCo 2 O 4 exhibits exceptional performance for the oxygen evolution reaction (OER), showcasing a photocurrent density of 4.3 mA·cm −2 at 1.23 V vs. RHE in 0.5 M Na 2 SO 4 under AM 1.5 G (100 mW·cm −2 ) illumination. Remarkably, this value is 5.2 times higher than that observed for BiVO 4 . Furthermore, the maximum incident photon to current conversion efficiency (IPCE) reaches an impressive 61.7 %, surpassing that of BiVO 4 and BiVO 4 /FeCo 2 O 4 by approximately 5.1 and 1.7 times, respectively. Additionally, the charge separation efficiency of H-BiVO 4 /MgO/FeCo 2 O 4 achieves a notable 83.4 %, and the charge injection efficiency is substantially improved. This study advocates for a straightforward yet highly effective approach to mitigate interfacial electron-hole recombination.
研究领域:
材料科学
·
能源科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Qizhao Wang,Jijuan He,Yanbiao Shi,Shuling Zhang,Tengjiao Niu,Houde She,Yingpu Bi,Ziqiang Lei
The leaf-like structure BiVO 4 electrode and MFe 2 O 4 /BiVO 4 (M = Ni, Co) composite photoelectrodes were prepared by electrochemical deposition, ensuing heating treatment and electrophoretic deposition technology. The characterizations of SEM, XRD and DRS indicated that the BiVO 4 derivatives mainly existed in small nanoparticles with monoclinic phase and exhibited stronger light absorption capability than that of pure BiVO 4 . Hereon, the respective photoelectrochemical (PEC) activities of BiVO 4 and its derived composites were systematically studied. The results suggested that the NiFe 2 O 4 /BiVO 4 and CoFe 2 O 4 /BiVO 4 not only showed higher photocurrent response values at 1.23 V vs. NHE than pure BiVO 4 electrode under visible light illumination, but also played a superior PEC hydrogen evolution performance, which was considered owing to their strong absorption to light, reduction combination of carriers and effective separation of electrons and holes.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaoli Ran,Yang Bai,Hao Zeng,Junhao Zhang,Haitao Fu,Xizhong An,Xiaohong Yang
Introducing oxygen vacancies into perovskite-type SrTiO3 nanoparticles usually takes dual or multiple steps, which are not conducive to subsequent modification and application. Herein, a facile nonstoichiometric method is applied to synthesize a series of oxygen vacancy (VO)-doped SrTiO3 (Sr1–XTiO3–δ) as a photoanode material in photoelectrochemical (PEC) water-splitting reactions. Experimental results reveal a nonlinear relationship between the PEC performance and VO concentration in SrTiO3 nanoparticles. Sr1–XTiO3–δ doped with an appropriate amount of VO can significantly enhance its light response and electrocatalytic activity. The optimal Sr0.95TiO3–δ demonstrated the best PEC activity with an incident photon-to-current conversion efficiency of 3.144 times higher than that of pristine SrTiO3. Enhanced PEC activity is attributed to superior light absorption and retarded photogenerated charge carrier recombination. This work systematically reveals the role of oxygen vacancies in SrTiO3 nanoparticles for achieving enhanced PEC performance in water splitting, which may offer inspiration for defect engineering of perovskite oxides.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Yuanmei Xu,Wenbing Chen,Xueshi Li
Much attention has been focused on the fabrication of TiO 2 microspheres due to their excellent properties and attractive potential in many fields. Here, undoped 3D hierarchical TiO 2 microspheres (TMS) were synthesized in situ on Ti mesh using a hydrothermal method by varying NaOH concentration, reaction time and temperature. The 3D TMS grown along the surface of the woven wires of the Ti meshes, using the metal Ti meshes as a substrate, which resulted in improved conductivity. Meanwhile, the original Ti mesh with the macroporosity (due to the 15 % open area of the mesh) can act as fast proton mass diffusion. As a result, the flexible TMS-Ti photoelectrodes exhibit an excellent current density of 1.63 mA/cm 2 at a potential of 1.23 V (vs Ag/AgCl). Therefore, the in situ synthesis of TiO 2 microspheres on Ti mesh is highly desirable for flexible devices.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2019
·Vol. 39
·期 7
·841-849
·
IF 1.785
Zhang Yi-Fei,Zhu Yu-Kun,Lv Chun-Xiao,Lai Shou-Juan,Xu Wen-Jia,Sun Jin,Sun Yuan-Yuan,Yang Dong-Jiang
A heterojunction photoanode of Fe 2 O 3 loaded on a WO 3 film on a fluorine-doped tin oxide substrate (FTO-WO 3 /Fe 2 O 3 ) was prepared via a simple hydrothermal and chemical vapor deposition (CVD) growth method. The photoanode showed higher photoelectrochemical (PEC) water-splitting activity than that of the pristine FTO-WO 3 under simulated sunlight because of the synergistic effect of Fe 2 O 3 and WO 3 . The as-synthesized material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The photocurrent density was estimated by linear sweep voltammetry and further confirmed using intensity-modulated photocurrent spectra. Experiments demonstrated that the coated Fe 2 O 3 enhanced the separation and migration efficiencies of the photoinduced electrons and holes, improving the PEC water-splitting properties. The FTO-WO 3 /Fe 2 O 3 photoanode showed a 1.25 times enhancement in photocurrent density compared with FTO-WO 3 . This result suggests that facile chemical vapor deposition growth is an effective way to fabricate heterojunctions and improve the properties of WO 3 photoanodes for PEC water-splitting applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Wenwen Li,Hongyan Wang,Zhe Sun,Quanping Wu,Song Xue
Cuprous oxide (Cu 2 O) is an attractive photo-electrocatalyst for sustainable hydrogen production . The main issues limiting the use of Cu 2 O as a photocathode are the severe electron-hole recombination and photo-corrosion in aqueous electrolyte . Herein, to address the above issues, amorphous SiO x overlayers have been deposited on the surface of Cu 2 O as a protective cover using a facile dip-coating method. The overall PEC performances have been greatly improved, as evidenced by the increased photocurrent density (3.1 times of bare Cu 2 O) and improved stability (3.8 times of bare Cu 2 O). The structure and PEC characterizations prove that Si has been gradient-doped into the Cu 2 O, leading to a downward band bending from the bulk to the surface region, which promotes the charge separation and transfer efficiently. In addition, the amorphous SiOx layers serve as protection layers and prevent the Cu 2 O from direct contact with the electrolyte, maintaining a high photocurrent density over the stability test. Decoration with Pt catalyst has further boosted the photocurrent density to be 2.8 mA cm −2 at 0 V vs. RHE with better stability, indicating the synergistic effect of SiOx layer and Pt catalyst This work provides a facile strategy to improve the PEC activity and stability of Cu 2 O, which may be extended to other systems with photo-corrosion problems, such as BiVO 4 or ZnO.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Hanlu Zeng,Yunlan Xu,Dengjie Zhong,Qingmei Qiao,Yuqin Yang
The performance of a photocatalytic fuel cell (PFC) depends on its photoelectrode. In this work, a novel three-dimensional flower-like hierarchical photoanode Zn Zr MOF/FeWO 4 /BiOBr/Ti was synthesized, characterized and applied in PFC to degrade rhodamine B and generate electricity simultaneously. The characterization results of XRD, SEM, EDS, FI-IR, DRS, and XPS show that the photoanode was successfully prepared. The loading of FeWO 4 and Zn Zr MOF widened the nanosheet spacing of BiOBr, which enhanced the light absorption intensity, broadened the light absorption band edge from 467.6 nm to 490.2 nm, and increased the photocurrent density from 0.0149 mA/cm 2 to 0.156 mA/cm 2 . The maximum photocurrent density, maximum power density, degradation rate , and FF of the PFC with the prepared photoanode were respectively 0.256 mA·cm −2 , 22.65 μW·cm −2 90.48 % (1 h), and 0.216, which were far higher than those of PFCs with mono and binary photoanodes. The strong photocatalytic performance of the photoanode is attributed to the type II heterojunction formed between BiOBr and FeWO 4 , which helps to separate electron-hole pairs. The main reactive materials responsible for degrading rhodamine B are h + and ·O 2 - . This research provides a new idea for developing an efficient visible light response photoanode.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）