Surfaces and Interfaces
·
2025
·
IF 6.3
Pengcheng Xiang,Lili Wang,Qin Geng,Changyan Guo,Hongtao Xie,Yizhao Li,Yangyang Yu,Jide Wang
Structural design of semiconductor photocatalysts plays an important role in promoting light absorption, molecular activation, and charge separation in the CO 2 reduction reaction, which is beneficial for improving photocatalytic activity. In this paper, a simple photodeposition strategy was employed to load Cu onto Bi 2 O 2 SO 4 and form a Cu-Bi alloy. Under simulated sunlight conditions, the optimal catalyst demonstrates impressive photocatalytic activity and selectivity for CO 2 reduction, with a corresponding yield of 18.8 μmol g -1 h -1 , 15 times higher than that of pure Bi 2 O 2 SO 4 , and CO selectivity reaching 97.1%. The results indicate that metal deposition enhances light absorption utilization efficiency and promotes the separation and transfer of photogenerated carriers. Additionally, the combination of in-situ FT-IR spectra and theoretical calculations reveal the molecular mechanisms of photocatalytic CO 2 reduction. This work discusses the synergistic effect of metal deposition and oxygen vacancies on photocatalytic reduction of CO 2 , providing a feasible method for constructing metal deposition structures with defects.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Yuewen Li,Yu Zhang,Xing Hou,Chunkun Lin,Degang Bu,Yalin Lan,Na Li,Shuyao Wu,Shuo Li,Xi-Ming Song
Seeking novel solar energy utilization and conversion methods has always been a frontier topic in energy research. Here, we propose a new way to directly photoelectrodeposit metals using solar energy based on semiconductor energy band theory . Three kinds of semiconductor photoanodes (TiO 2 , BiVO 4 and Fe 2 O 3 ) are employed to deposit metallic Cu or Bi at the cathode under illumination without external voltage. It is found that when TiO 2 and BiVO 4 are used as photoanodes, Cu, Cu 2 O and Bi can be continuously deposited on the cathode, but when Fe 2 O 3 photoanode is irradiated, no material comes out. The results prove that the potential of electrons in the conduction band determines whether photoelectric deposition occurs or not. The related mechanism involves the oxygen reduction reaction (OER) of the valence band holes of the photoanode, the collection of conduction band electrons by back electrode, as well as the reduction of metal ions on the counter electrode. In addition, we also put forward the concept of using the deposited Cu or Bi as the metal electrode to form a new metal-air battery to release chemical energy of the deposited metal.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy Technologies and Assessments
·
2024
·
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
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Haidong Chen,Feng Zhang,Xianwen Sun,Weifeng Zhang,Guoqiang Li
We systematically investigated the impact of reaction atmosphere on the Pt cocatalyst photodeposition and hydrogen evolution . A long induction period which is hardly found in close-system appears in the presence of oxygen, and is affected by the concentration of chloroplatinic acid. The Pt cocatalyst is metal state and contributes to the electronic states near Fermi level judging from the valence band X-ray photoelectron spectrum. The cocatalyst metal Pt will reduce the surface photovoltage signals due to the metal feature. The hydrogen evolution rate increased and reached a platform with increasing the Pt coverage on the surface of photocatalyst which is characterized by the Pt:Ti atomic ratio.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·
IF 2.2
Lipeng Wang,Mengjiao Zheng,Longjie Lai,Rui Wang,Tongton Qian,Li Zhang,Waqar Younas,Guobing Mao,Qi Liu
Graphical Au nanoparticles and PB-modified ZnIn 2 S 4 composite photoanode are successfully prepared on FTO substrates. The ZnIn 2 S 4 /Au/PB photoanode achieves a photocurrent density of 0.42 mA/cm 2 at 1.23 V RHE under light illumination alongside a high incident photon-to-electron conversion efficiency (IPCE) value of 24.6 %. ZnIn 2 S 4 has been regarded as a promising photoanode material for photoelectrochemical (PEC) water splitting. However, its severe charge recombination and low carrier transport efficiency limit practical applications in PEC water splitting. A novel ZnIn 2 S 4 /Au/PB photoanode was prepared by using the in-situ photodeposition of Au nanoparticles and electrodeposition of Prussian blue (PB) nanoparticles onto ZnIn 2 S 4 nanosheets. The photocurrent density of the prepared ternary photoanode reached 0.42 mA/cm 2 at 1.23 V RHE , which is 6 times higher than pure ZnIn 2 S 4 . The introduction of Au nanoparticles remarkably improved the efficiency of carrier transport and separation. Additionally, the application of PB onto ZnIn 2 S 4 resulted in an extended spectrum of light absorption. The incident photon-to-current efficiency (IPCE) value recorded was 24.6 % at 350 nm. This improvement can be attributed to the formation of a Z-type 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
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2023
·Vol. 120
·期 12
·e2216627120
·
IF 11.1
Xiaolin Lu,Xujie Wang,Yong Liu,Tao Ding
Chiral nanostructures based on semiconductors exhibit pronounced properties of chiral luminescence and optoelectronic responses, which are fundamental for chiroptoelectronic devices. However, the state-of-the-art techniques of generating semiconductors with chiral configurations are poorly developed, most of which are complicated or of low yield, rendering low compatibility to the platform of optoelectronic devices. Here we show polarization-directed oriented growth of platinum oxide/sulfide nanoparticles based on optical dipole interactions and near-field–enhanced photochemical deposition. By rotating the polarization during the irradiation or employing vector beam, both three dimensional and planar chiral nanostructures can be obtained, which is extendable to cadmium sulfide. These chiral superstructures exhibit broadband optical activity with a g-factor of ~0.2 and a luminescence g-factor of ~0.5 in the visible, making them promising candidate for chiroptoelectronic devices.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Extreme Manufacturing
·
2024
·Vol. 7
·期 1
·015004
·
IF 16.1
Jialiang Zhang,Fangzheng Ren,Qing Yang,Qingyun Ma,Jie Liang,Yizhao Meng,Xiaodan Gou,Chongxiao Xia,Feng Chen
Transparent materials utilized as underwater optical windows are highly vulnerable to various forms of pollution or abrasion due to their intrinsic hydrophilic properties. This susceptibility is particularly pronounced in underwater environments where pollutants can impede the operation of these optical devices, significantly degrading or even compromising their optical properties. The glass catfish, known for its remarkable transparency in water, maintains surface cleanliness and clarity despite exposure to contaminants, impurities abrasion, and hydraulic pressure. Inspired by the glass catfish's natural attributes, this study introduces a new solution named subaquatic abrasion-resistant and anti-fouling window (SAAW). Utilizing femtosecond laser ablation and electrodeposition, the SAAW is engineered by embedding fine metal bone structures into a transparent substrate and anti-fouling sliding layer, akin to the sturdy bones among catfish's body. This approach significantly bolsters the window's abrasion resistance and anti-fouling performance while maintaining high light transmittance. The sliding layer on the SAAW's surface remarkably reduces the friction of various liquids, which is the reason that SAAW owns the great anti-fouling property. The SAAW demonstrates outstanding optical clarity even after enduring hundreds of sandpaper abrasions, attributing to the fine metal bone structures bearing all external forces and protecting the sliding layer of SAAW. Furthermore, it exhibits exceptional resistance to biological adhesion and underwater pressure. In a green algae environment, the window remains clean with minimal change in transmittance over one month. Moreover, it retains its wettability and anti-fouling properties when subjected to a depth of 30 m of underwater pressure for 30 d. Hence, the SAAW prepared by femtosecond laser ablation and electrodeposition presents a promising strategy for developing stable optical windows in liquid environments.
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2015
·Vol. 17
·期 45
·8697-8702
·
IF 4.034
Xiaolin Wu,Jiang-Long Wang,Hongrui Zhang,Shufang Wang,Shengjun Zhai,Yaguang Li,Dogheche Elhadj,Guangsheng Fu
c-axis oriented Bi1−xPbxCuSeO (0 ≤ x ≤ 0.8) single crystalline thin films have been successfully epitaxially grown on SrTiO3 (001) substrates via the pulsed laser deposition technique. Detailed X-ray diffraction and transmission electron microscopy measurements reveal the excellent c-axis and ab-plane texture of the films. As the Pb doping concentration increases, both the resistivity and the Seebeck coefficient decrease due to the increase in hole carrier concentration. The highest power factor of about 1.2 mW m−1 K−2 has been achieved in Bi0.96Pb0.06CuSeO single crystalline thin films at 673 K, which is much higher than those of polycrystalline ceramics with random orientation, suggesting that c-axis oriented BiCuSeO-based single crystalline thin films might have great potential for application in thermoelectric thin film devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 29
·15287-15293
·
IF 8.867
Xianliang Fu,Li Zhang,Lihua Liu,Hui Li,Sugang Meng,Xiangju Ye,Shifu Chen
MoSx was successfully loaded on hexagonal CdS nanorods as a cocatalyst for the photocatalytic H2 evolution reaction (HER) by a convenient in situ photodeposition method with (NH4)2MoS4 as a precursor. The route is more effective to improve the activity of CdS than the conventional deposition methods. The optimal loading amount of MoSx was determined to be 0.2% (wt%, calculated in terms of MoS2) and the activity of the resulting sample is even higher than that of 0.2% Pt/CdS prepared by a similar photodeposition procedure. An intimate junction in the form of the Cd–S–Mo bond was suggested to account for the high HER performance. This finding opens a new avenue for the deposition and application of sulfide-based cocatalysts which have a great potential to replace noble metal cocatalysts for the photocatalytic HER.
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 LUMINESCENCE
·
2020
·
IF 3.28
Xing Cao,Shichang Sun,Bing Lu,Yan Liu,Rui Ma,Huiqun Cao,Hongzhi Ma,Hexun Huang
In order to overcome the shortcomings of insufficient red light component and poor thermal stability of commercial white light emitting diode (WLED), YAG:Ce, R (R: Gd 3+ , Pr 3+ , Gd 3+ and Pr 3+ ) fluorescent thin films were prepared by pulse laser deposition (PLD). The composition and microstructure, photoluminescence properties, and red-enhanced mechanism of co-doped YAG fluorescent thin films, as well as the electroluminescence behavior of the corresponding WLEDs were investigated. Results showed that the doping of Pr 3+ caused the emission spectrum energy of Ce 3+ to migrate, and an emission peak appeared at 606 nm in the red region. The doping of Gd 3+ caused the emission spectrum of Ce 3+ to shift to the red region, and the main peak position of the Ce 3+ emission spectrum is red-shifted from 523 nm to 548 nm. The YAG:Ce,Pr,Gd fluorescent film not only realized the improvement of red light components and red-shift, but also increased the energy transmission efficiency from 33.3% to 51.9%. Moreover, results of the color coordinate analysis also showed that the co-doping of Gd 3+ and Pr 3+ made the luminescence closer to the red region, reducing the color temperatures and hues changed to warm. Thus, tri-doped transparent fluorescent thin film were prospective for WLED application.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2021
·
IF 3.314
Beilei Yuan,Haoming Wei,Jingwei Li,Yu Zhou,Fan Xu,Jinkai Li,Bingqiang Cao
In this paper, inorganic halide perovskite cesium lead bromide (CsPbBr3) films are epitaxially grown on (100)-oriented SrTiO3 substrates by pulsed laser deposition (PLD). This method has the distinctive advantages to grow high-quality films with a precise composition, designed crystalline orientation, and controlled uniform thickness. By optimizing the substrate temperatures and laser pulse numbers, (100)-CsPbBr3 films with uniform morphology are grown on a SrTiO3 substrate via a cubic-on-cubic epitaxial growth mode, which is proven by XRD investigation. Detailed photophysical spectroscopy study including femtosecond transient absorption spectra and detailed low-temperature photoluminescence spectra indicate that such epitaxial CsPbBr3 films are of very low defects in the bandgap. The temperature-dependent resistivity measurement reveals that the epitaxial CsPbBr3 films show a typical thermally activated carrier behavior with a bandgap value of 2.37 eV, which is very consistent with the optical result and indicates a quasi-intrinsic semiconductor nature of such an epitaxial film. Our results confirm that CsPbBr3 films with high crystal quality and lower defect density can be epitaxially grown with PLD for further superlattices and quantum wells.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
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