NANOTECHNOLOGY
·
2024
·Vol. 35
·期 15
·155402
·
IF 2.9
Wei Zhang,Xing Zhang,Lina Zhang,Jinwen Ma,Xiaotong Yin,Yuxin Tian,Chuang Wang,Qiushi Wang
A novel 3D hierarchical TiO2/CaIn2S4/C3N4 arrays with dual heterojunctions photoanode is constructed by stepwise deposition of CaIn2S4 nanosheets and ultrathin C3N4 onto the well-aligned TiO2 nanorods arrays. Integrating the merit of the superior ability of CaIn2S4 and C3N4 to harvest visible light, dual type-Ⅱ heterojunction band structure and one-dimensional ordered nanostructures, the TiO2/CaIn2S4/C3N4 photoanode exhibits simultaneous significant improvements in visible-light harvesting, charge separation and electron transfer capability. At 1.23 V (versus reversible hydrogen electrode) under AM 1.5 G irradiation, the TiO2/CaIn2S475/C3N4 photoanode exhibits a photocurrent density of 4.5 mA cm−2, which is 5.2 and 51.1-fold higher than that of TiO2/CaIn2S475 and pristine TiO2 photoanode, respectively. Moreover, the applied bias photo-to-current efficiency (ABPE) of the TiO2/CaIn2S475/C3N4 photoanode reaches 3.5% at 0.36 V (versus reversible hydrogen electrode). These results are helpful for fabricating more efficient heterostructure photoelectrodes.
研究领域:
材料科学
·
光催化
·
能源转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Lele Yang,Hong Chen,Yuntao Xu,Rong Qian,Qiao Chen,Yuanxing Fang
The efficiency of hydrogen peroxide evolution reaction (H 2 O 2 ER) by photoanodic water oxidation is normally limited by low yield and poor selectivity. In this work, the surfaces of Mo doped BiVO 4 are modified by Co 2+ and PO 4 3- ions (CPMB), which has been used as the photoanode with improved H 2 O 2 yield and selectivity. The optimal evolution rate of the CPMB is ca. 0.23 µmol·min −1 ·cm −2 , corresponding to 2.5 times to the pristine BiVO 4 photoanode, and the faradaic efficiency of CPMB photoanode for H 2 O 2 ER is ca. 26%. In this study, the mechanism for the improved H 2 O 2 evolution performance of CPMB has been investigated, indicating that PO 4 3- ions mainly promote the formation of the •OH by dissociation of H 2 O, while Co 2+ ions accelerate the conversion of the •OH for the subsequent H 2 O 2 evolution. This study offers the strategy for designing an efficient photoelectrochemical system with optimized solar conversion efficiency for H 2 O 2 production.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zi-Han Zhang,Tao Yang,Ze-Yuan Wang,Hai-Chao Wang,Xin-Zheng Yue,Sha-Sha Yi
The photoelectrochemical (PEC) performance of hematite ( α -Fe 2 O 3 )-based photoanodes is still far from its theoretical value because they are constrained by serious charge recombination and sluggish water oxidation kinetics. Herein, we developed a heterostructural photoanode by coating boron doped graphite carbon nitride nanolayers onto an Fe 2 O 3 nanoarray (BCN/Fe 2 O 3 ), followed by modification with NiCo(OH) x cocatalyst. The constructed NiCo(OH) x /BCN/Fe 2 O 3 demonstrates a significantly improved photocurrent density of 2.7 mA cm −2 at 1.23 V RHE (V versus reversible hydrogen electrode), which is 3.2 times higher than that of pristine Fe 2 O 3 . Additionally, it exhibits an extremely negative onset potential of 0.60 V RHE . Detailed studies reveal that the BCN/Fe 2 O 3 heterojunction endows a driving force for charge separation and establishes a direct pathway for their transport, while NiCo(OH) x acts as a cocatalyst to accelerate the surface water oxidation reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 45
·455405
·
IF 3.551
Xiaolin He,Chaoqun Shang,Qingguo Meng,Zhihong Chen,Mingliang Jin,Lingling Shui,Yongguang Zhang,Zhang Zhang,Mingzhe Yuan,Xin Wang,Krzysztof Kempa,Guofu Zhou
Hematite is recognized as an excellent photocatalyst for photoelectrochemical photoanodes for water oxidation because of its favorable band gap, excellent anti-photocorrosion and structural stability in alkaline solution. However, slow charge transport and fast carrier recombination in the bulk and at the hematite photoanode/electrolyte interface, have limited its applications for water splitting. Herein, we report a highly efficient hematite/ferrhydrite (Fh) core–shell photoanode system, consisting of hematite (α-Fe2O3) semiconductor nanorods which dramatically enhance light harvesting, and ferrhydrite as the hole-storage shell. Our integrated hematite/ferrhydrite core–shell photoanode shows 2.7 times increased photo-current density under simulated sun light irradiation.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Jing Li,Feng Li,Jun Jin
Hematite can be used as an efficient photoanode for solar water oxidation , but its oxygen evolution kinetics are quite slow. Herein, we developed an efficient hole transport photoanode via the in situ growth of ultrathin Fe-doped NiOOH on fluorine-doped hematite arrays using a natural growth strategy. The resulting FeNiOOH/F–Fe 2 O 3 photoanode showed a high charge separation and injection efficiency. It achieved a stable photocurrent density of 2.52 mA cm −2 at 1.23 V vs. RHE, which was approximately 4.1-fold higher than that of pristine α-Fe 2 O 3 . Systematic studies revealed that the excellent photoelectrochemical activity was due to heteroatom doping and interactions between the co-catalyst (FeNiOOH) and F–Fe 2 O 3 . Fe doping primarily changed the lattice strain of the co-catalyst, while F doping decreased surface charge recombination and enhanced the intrinsic conductivity of hematite by increasing the carrier density. An ultrathin, amorphous layer of FeNiOOH further accelerated photogenerated hole extraction and the water oxidation kinetics. This work provides a method to produce new, cost-effective photoanodes for clean hydrogen production .
研究领域:
材料科学
·
可再生能源
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2018
·
IF 3.771
Rong Chen,Ming Xia,Xun Zhu,Qiang Liao,Dingding Ye,Liang An,Youxu Yu,Long Jiao,Wei Zhang
A micro photocatalytic fuel cell with a visible-light responsive photoanode and the lateral arrangement of the electrodes at the same plane was developed to enable simultaneous organics degradation and electricity generation . The developed micro photocatalytic fuel cell was assessed by using methanol as a representative organic compound in the alkaline environment . It is shown that good visible-light response was achieved. The effects of the light intensity, methanol concentration , KOH concentration and liquid flow rate were also explored. Experimental results showed that when the light intensity was increased, the cell performance was improved due to more photo-excited electron-hole pairs. Upgrading the KOH concentration led to the increased performance due to more efficient capture of the holes and enhanced cathodic reaction and ion transport. The increase of the methanol concentration in the testing range led to the improved performance as a result of the enhanced mass transport. The discharging performance was firstly increased and then decreased with increasing the liquid flow rate due to the competition of enhanced mass transfer and decreased residence time and increased methanol crossover .
研究领域:
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Hongmin Liu,Pankun Wu,Ronghao Wang,Huanjiang Meng,Yaqi Zhang,Weizhai Bao,Jingfa Li
The combination of photo-driven self-powered supplies and energy storage systems is considered as a promising candidate to solve the global energy dilemma. The photo-absorber and the energy storage material are integrated into the photocathode to effectively achieve a high-energy and high-efficiency energy system. In this work, we report the customized Janus-jointed photocathode design (integrating with highly efficient halide perovskite and tellurium composite electrode) and introduce it into the aqueous zinc–tellurium battery. The well-matched energy level of the Janus-jointed photocathode ensures the conversion of the photoenergy into electrical energy by transferring the photoexcited charge between each. As expected, in the photo-assisted recharging model, the decreased 0.1 V charge voltage and the extra 362 mA h g–1 at 100 mA g–1 demonstrated the significant merits of saving energy for such a photo-rechargeable Zn–Te (PRZT) battery. When the current density is 1000 mA g–1, the specific capacity of the prepared photocathode is 83% higher than that under dark conditions. More importantly, the photogenerated charge by the perovskite under light illumination could also directly photocharge the battery with no external current, indicating the self-powering traits. The rational design in this work is believed to provide a sustainable mode for efficient charging of the aqueous PRZT battery.
研究领域:
材料科学
·
能源工程
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·
IF 13.3
Shuyang Peng,Di Liu,Keyu An,Zhiqin Ying,Mingpeng Chen,Jinxian Feng,Kin Ho Lo,Hui Pan
Green hydrogen is considered to be the key for solving the emerging energy and environmental issues. The photoelectrochemical (PEC) process for the production of green hydrogen has been widely investigated because solar power is clean and renewable. However, mass production in this way is still far away from reality. Here, a Si photoanode is reported with CoO x as co-catalyst for efficient water oxidation. It is found that a high photovoltage of 350 mV can be achieved in 1.0 m K 3 BO 3 . Importantly, the photovoltage can be further increased to 650 mV and the fill factor of 0.62 is obtained in 1.0 m K 3 BO 3 by incorporating Mo into CoO x . The Mo-incorporated photoanode is also highly stable. It is shown that the incorporation of Mo can reduce the particle size of co-catalyst on the Si surface, improve the particle-distribution uniformity, and increase the density of particles, which can effectively enhance the light absorption and the electrochemical active surface area. Importantly, the Mo-incorporation results in high energy barrier in the heterojunction. All of these factors are attributed to improved the PEC performance. These findings may provide new strategies to maximize the solar-to-fuel efficiency by tuning the co-catalysts on the Si surface.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zhiyong Jiang,Xiaodi Zhu,Jun Bao
The octahedral structure motif in spinel oxides photoelectrodes is usually recognized as a crucial factor for charge carriers transportation, which can directly influence the performance of oxygen-related photoelectrochemical (PEC) reactions at the electrode/electrolyte interface (EEI). Here in this work, a quasi-reversible oxygen-sulfur (O-S) exchange strategy is provided through facile anion exchange reaction followed by photo-assisted cyclic voltammetry (photo-CV) treatment to manipulate the FeO 6 octahedral structure motif in spinel zinc ferrite (ZnFe 2 O 4 ) photoanodes. The obtained ZnFe 2 O 4–x S x photoanodes with FeO 6−x S x units in bulk phase and activated FeO 6 units in surface region exhibit excellent PEC performance for water oxidation, delivering ≈2 orders of magnitude higher photocurrent density at 1.23 V vs. the reversible hydrogen electrode (V RHE ) compared to ZnFe 2 O 4 photoanodes under AM 1.5G illumination. Additionally, the kinetics of water oxidation reaction on ZnFe 2 O 4–x S x photoanodes is further improved upon loading NiFeO x cocatalyst, reaching a photocurrent density of 1.1 mA cm −2 at 1.23 V RHE , which ranks at the highest level among reported literature. This work opens up a new approach to facilitate the charge carriers’ transportation in spinel oxides and advances the solar water splitting performance of ZnFe 2 O 4 photoanodes for application in relevant PEC devices.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Chenhan Lv,Haixiang Cheng,Rui Fan,Jingyu Sun,Xinghai Liu,Yinghui Ji
Organic fluorine compounds are acute carcinogenic and mutagenic to humans. Photoelectrocatalysis (PEC) treatment is an innovative technology in the field of the removal of fluorine compounds, and thus current research focused on improving stability and catalytic ability of photoanode. In this study, it has been synthesized a rGO/BiOI photocathode for the efficient degradation of 4-Fluoroaniline (4-FA). The physical characterization and photoelectrochemical properties of the photocathode was determined. The results indicate that the PEC treatment with the rGO/BiOI photocathode was more efficient compared with individual processes. During the optimization experiments, the PEC treatment achieved 99.58 % and 72.12 % of 4-FA degradation and defluorination within 1 h. Cyclic stability experiments show that rGO/BiOI photocathode was efficient and stable, which reached 96.91 % and 67.64 % of 4-FA degradation and defluorination after five cycles. Mechanism analysis indicates that the PEC process was based on an electrochemical reaction and photo-induced processes. The degradation product of 4-FA was mainly 2,4-di-t-butylphenol, and trapping experiments indicates that h + is the primary oxidizing species. Therefore, PEC treatment with rGO/BiOI photocathode is a competitive green approach to remove fluorine compounds pollutants and brings new insights into development of PEC treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Manjing Wang,Yucheng Li,Xinghua Cui,Qixing Zhang,Sanjiang Pan,Sayantan Mazumdar,Ying Zhao,Xiaodan Zhang
Perovskite-based photoelectrodes have demonstrated great potential in the field of solar energy conversion and solar fuel owing to the excellent optoelectronic properties of organic–inorganic hybrid halide perovskites. However, the instability of perovskite limits its development. Herein, a double-layer graphite sheet/nickel (GS/Ni) is introduced as an efficient waterproof to encapsulate the perovskite-based photoanode for solar-to-fuel generation directly in an aqueous solution. The photoanodes, which are fabricated by perovskite solar cell as a light harvester, exhibit outstanding performance with an onset potential shift of 1100 mV, photocurrent density of 17.4 mA/cm2 at 1.23 VRHE, and ideal ratiometric power-saved efficiency of 5.82%. The perovskite-based photoanode demonstrates enhanced stability for over 40 h in 1 M KOH. The active area of photoanode is expanded to 0.7 cm2 via scalable encapsulation technique with outstanding photoelectrochemical performance. The photoanodes encapsulated by GS/Ni show remarkable stability and photocurrent density, which indicates that it is a promising candidate for photoelectrochemical solar fuel generation.
研究领域:
材料科学
·
能源转换
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Wu JiaHui,Li Li,Zhai Liying,Zhang Zuxing
BiOI/BiPO 4 photoelectrode was prepared by a two-step electrodeposition method, and the BiOI/BiPO 4 composite material was first applied to the glucose photoelectrochemical (PEC) monitoring platform. The photoelectrodes were characterized by scanning electron microscopy, X-ray diffraction, UV–vis diffuse reflectance spectrophotometer, and photoelectrochemical measurement. The UV–vis diffuse reflectance spectra showed that the BiOI/BiPO 4 nanocomposites had a strong absorption in the visible region. The BiOI/BiPO 4 electrode showed a linear response in the concentration range of 0.1 μM to 10 mM for glucose with a sensitivity of 0.157 μA mM −1 cm −2 , and the detection limit was 0.0499 μM. In addition, the designed BiOI/BiPO 4 PEC sensor has good reproducibility, long-term stability, and selectivity.
研究领域:
生物传感器
·
材料科学
·
分析化学
✓ 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）