INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Lulu Long,Changwei Bai,Shirong Zhang,Shihuai Deng,Dong Tian,Fei Shen,Yanzong Zhang,Jun Wu,Jisong He,Gang Yang
Photoelectrocatalytic (PEC) technology has promising applications. It is capable of effectively generating hydrogen and removing organic pollutant in water at the same time. Though TiO 2 materials have been proven an excellent candidate for fabricating PEC electrodes for its low toxicity, high oxidation potential and photocatalytic activity, the catalytic performance of TiO 2 electrodes is limited by their low electrons transporting efficiency. In this study, using a facile electrochemical method , we produced single crystalline TiO 2 nanotubes (s-TNTs) exposing {001} facets with enhanced charge transfer efficiency than that of common TiO 2 nanotubes electrodes (m-TNTs). In this system, the electrochromic s-TNTs electrodes exhibit better performance in generating hydrogen and higher degradation rate of atrazine on s-TNTs than that on common TiO 2 nanotubes electrodes (m-TNTs) in varying conditions: electrochemical (EC), photocatalytic (PC), and PEC. Using s-TNTs and s-TNTs@Pd nanocomposites as both photoanode and cathode, the photon-to-current conversion efficiency was significantly enhanced, and the promoted hydrogen production rose obviously. The enhanced charge transfer efficiency of s-TNTs might induce a highly enhancement in the whole PEC system, which could be primarily attributed to the single-crystalline structure and exposed {001} facet. This study could provide new possibility of utilizing single crystalline TiO 2 nanotubes for efficient dual-purpose PEC system for its high activity, great stability, low cost and no toxicity.
研究领域:
材料科学
·
环境科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yan Zhang,Youzhi Ji,Jinhua Li,Jing Bai,Shuai Chen,Linsen Li,Jiachen Wang,Tingsheng Zhou,Panyu Jiang,Xiaohong Guan,Baoxue Zhou
The efficient removal of ammonia is a difficult issue in wastewater treatment because ammonia is easily converted to nitrate instead of N 2 . The oxidation of ammonia by chlorine radical (Cl ) is recognized as an effective method. However, the massive generation of toxic byproducts chlorate and nitrate pose great risk for its practical application due to the excessive oxidation capacity of hydroxyl radical. Herein, we propose a novel method to selectively generate Cl for efficient ammonia removal using BiVO 4 /WO 3 photoanode in a self-driven photoelectrocatalytic (PEC) system. Cl was predominantly produced by regulating the valence band edge of WO 3 though modifying BiVO 4 , which tuned the moderate oxidative force of hole to reduce OH generation and thereby inhibited the formation of chlorate and nitrate. The self-driven ammonia degradation was achieved by employing BiVO 4 /WO 3 and Si photovoltaic cells as composite photoanodes to improve light-absorption and electron-hole separation, thus enhancing Cl production. These results showed that 10 mg L −1 of ammonia-N was completely removed (99.3 %) in 120 min with 80.1 % of total nitrogen removal. Toxic byproducts chlorate and nitrate were inhibited by 79.3 % and 31 %, respectively, compared to WO 3 . This work provides new insights to develop efficient, energy-saving and environment-friendly method for ammonia pollution treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Anni Cui,Lihua Dong,Yiting Hou,Xin Mu,Yu Sun,Huan Wang,Xiahua Zhong,Guiye Shan
Sensitive detection and effective inactivation of bacteria are essential in preventing foodborne bacterial infection that poses a significant threat to human health. Herein, a near-infrared (NIR)-driven multifunctional photoelectrochemical (PEC) biosensor was constructed for detection and inactivation of S. aureus . Based on the covalent bonding between amine and carboxyl groups, carboxyl-functionalized SA31 aptamer was immobilized on the PDA/MnO 2 photoelectrode. In the presence of S. aureus , SA31 aptamer can specifically capture S. aureus , causing the decrease of photocurrent signal owing to steric hindrance effect. Leveraging photocurrent-off signal, there existed a satisfied linear relationship between the photocurrent variation and the logarithm of S. aureus concentration, achieving a wide linear range from 10 to 10 7 CFU/mL with a low detection limit of 2.0 CFU/mL. Notably, PDA/MnO 2 with peroxidase-like activity facilitated the catalytic oxidation of S. aureus with assistance of hydrogen peroxide (H 2 O 2 ) to cause the inactivation of S. aureus . Desorption of inactivated S. aureus from the photoelectrode led to a recovery of photocurrent signal, enabling a "signal on" switch. Simultaneously, the excellent photothermal performance of the PDA/MnO 2 converted light energy into heat energy under the irradiation of NIR light (808 nm, 1.5 W/cm 2 ), triggering the synergistic antibacterial effect against S. aureus (97.36%). This work provides a novel strategy for fabricating the detection and inactivation of bacteria in practical applications.
研究领域:
生物传感技术
·
微生物学
·
食品安全
·
医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Fanglei Liu,Jiayi Zhao,Xinyu Liu,Xi Zhen,Qiumei Feng,Yingqiu Gu,Guohai Yang,Lulu Qu,Jun-Jie Zhu
In this paper, a photoelectrochemical (PEC)-surface-enhanced Raman scattering (SERS) dual-mode biosensor is constructed coupled with a dual-recognition binding-induced DNA walker with a carbon nitride nanosheet (C3N4)/MXene-gold nanoparticles (C/M-Au NPs) accelerator, which is reliable and capable for sensitive and accurate detection of Staphylococcus aureus (S. aureus). Initially, a photoactive heterostructure is formed by combining C3N4 and MXene via a simple electrostatic self-assembly as they possess well-matched band-edge energy levels. Subsequently, in situ growth of gold nanoparticles on the formed surface results in better PEC performance and SERS activity, because of the synergistic effects of surface plasmon resonance and Schottky barrier. Furthermore, a three-dimensional, bipedal, and dual-recognition binding-induced DNA walker is introduced with the formation of Pb2+-dependent DNAzyme. In the presence of S. aureus, a significant quantity of intermediate DNA (I-DNA) is generated, which can open the hairpin structure of Methylene Blue-tagged hairpin DNA (H-MB) on the electrode surface, thereby enabling the switch of signals for the quantitative determination of S. aureus. The constructed PEC-SERS dual-mode biosensor that can be mutually verified under one reaction effectively addresses the problem of the low detection accuracy of traditional sensors. Experimental results revealed that the effective combination of PEC and SERS is achieved for amplification detection of S. aureus with a detection range of 5–108 CFU/mL (PEC) and 10–108 CFU/mL (SERS), and a detection of limit of 0.70 CFU/mL (PEC) and 1.35 CFU/mL (SERS), respectively. Therefore, this study offers a novel and effective dual-mode sensing strategy, which has important implications for bioanalysis and health monitoring.
研究领域:
生物化学
·
纳米技术
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2022
·Vol. 29
·期 2
·685-693
·
IF 2.961
Li Jinyun,Li Wenwen,Deng Guoxiong,Qin Ying,Wang Hongyan,Wang Yunjia,Xue Song
Cuprous oxide (Cu 2 O) is a promising photocathode for photo-electrochemical hydrogen production. One of the main issues limiting the application of Cu 2 O is photo-corrosion in aqueous electrolyte during the PEC process. Herein, to improve the stability of Cu 2 O, for the first time, a soluble polymer polyimide (PI) was introduced as a protective layer using a facile spin-coating method. It was found that dense PI films effectively isolated Cu 2 O from the aqueous electrolyte and inhibited self-reduction and oxidation reactions of Cu 2 O as evidenced by XRD spectra. Compared with bare Cu 2 O, the photocurrent density and stability of modified Cu 2 O samples were increased with increasing the spin-coating amount of PI solutions. It was found that sample Cu 2 O/PI-200 showed the highest current density value of 1.8 mA/cm 2 at 0 V RHE after 1200 s without attenuation, which is 40 times higher than the bare Cu 2 O (0.04 mA/cm 2 at 0 V RHE ). Further enhancing the PI amount, such as sample Cu 2 O/PI-300, will lead to a very stable but lower current density (1.48 mA/cm 2 ) during the whole test duration. EIS measurements indicated that thicker PI films lead to larger charge transfer resistance and higher capacitance in the space charge layer. Therefore, there is an optimum amount of PI (Cu 2 O/PI-200) to balance the above two opposite effects and achieve the best PEC performance. 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
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 17
·5760-5770
·
IF 4
Shouli Bai,Shiyu Jia,Yingying Zhao,Yongjun Feng,Ruixian Luo,Dianqing Li,Aifan Chen
Photoelectrochemical (PEC) water splitting has been recognized as the most promising approach for directly converting solar energy into chemical energy, and substantial efforts have been made to develop a highly efficient and low-cost photoanode for enhancement of PEC water splitting efficiency due to sluggish water oxidation reaction kinetics. A ternary NiFePB-modified ZnO/BiVO4 heterojunction photoanode was simply assembled by low-temperature hydrothermal, metal–organic decomposition and electrodeposition methods to improve the water splitting efficiency; its photocurrent density for water oxidation reached 1.66 mA cm−2 at 1.23 V (vs. RHE); in comparison, that of ZnO is only 0.4 mA cm−2. The onset potential manifests a cathodic shift of ∼283 mV compared to ZnO. The IPCE and the ABPE respectively are 3.1 and 6.4 times those of ZnO, respectively. This improvement is ascribed to the efficient separation of photogenerated electrons and holes by the formation of a heterojunction between ZnO and BiVO4 and the enhancement in the oxygen evolution reaction kinetics by the decoration of the co-catalyst NiFePB as a hole acceptor.
研究领域:
材料科学
·
能源转换与储存
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Shouli Bai,Jingyi Han,Kewei Zhang,Jianhua Sun,Jian Guo,Ruixian Luo,Dianqing Li,Aifan Chen
Efficient charge separation and rapid surface reaction kinetics play a significant part in the efficiency of solar water splitting. A novel triadic MoO3/BiVO4/CoMnZn photoanode was prepared successfully via metal organic decomposition and electrodeposition methods. Compared with the original BiVO4 photoanode, the as-prepared novel photoanode significantly broadens the visible light absorption and increases the photocurrent density up to 1.24 mA/cm2 at 1.23 versus RHE that is 2.21 and 1.51 times those of pure BiVO4 and MoO3/BiVO4 photoanodes. The incident photon-to-current efficiency value of the ternary photoanode is 1.83 times that of the pure BiVO4 at λ = 420 nm. The reason for the enhancement is recognized to be the formation of MoO3/BiVO4 heterojunction that inhibits the recombination of electron and hole pair, while the existence of CoMnZn cocatalyst effectively reduces carrier recombination at photoanode/electrolyte interfaces, which in turn further improves the photocurrent density and has been verified by the calculated carrier density, carrier transport resistance, and carrier life from the mass, electrochemical impedance, and intensity modulated photocurrent spectra.
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 Today Nano
·
2023
·
IF 10.3
Y. Zhao,A.V. Kuklin,H. Huang,Q. Zhang,S. Wei,H. Zhang,C. Yu,Y. Li,H. Ågren,L. Gao
Bi nanoplatelets (NPLs) with a narrow size distribution and high yield have been successfully fabricated by a novel two-step sonication-assisted solvothermal method . Applied as photo-electrochemical (PEC)-type photodetectors (PDs), it is shown that the Bi NPLs exhibit a pronounced photo-response ranging from the ultraviolet to the visible regions. The photo-response performance of Bi NPLs-based PDs was adjusted by external conditions and interpreted by density functional theory calculations in terms of the formation of the respective Bi-based compounds. The PEC results demonstrate that the optimal photocurrent density ( P ph ) and photoresponsivity ( R ph ) can reach 12.27 μA/cm 2 and 3016 μA/W in alkaline electrolytes , respectively. Besides, the Bi NPLs-based PDs exhibit superb long-term cycling stability (∼97.86% remained after 1000 cycles). We conclude that Bi NPLs demonstrate great promise as an emerging building block for the design of high-performance PEC-type PDs as well as other novel optoelectronic devices , holding the potential for breakthrough developments in these fields.
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
METHODS
·
2019
·
IF 3.782
Hongshun Hao,Shouchen Hao,Hongman Hou,Gongliang Zhang,Yunxia Hou,Zuowei Zhang,Jingran Bi,Shuang Yan
A novel photoelectrochemical (PEC) immunosensor based on CdSe quantum dots (QDs) sensitized Ho 3+ /Yb 3+ -TiO 2 for the detection of Vibrio parahaemolyticus (VP) was assembled. The working electrode was constructed via the layer-by-layer (LBL) method with the Ho 3+ /Yb 3+ -TiO 2 , CdSe QDs, NHS/EDC, antibody of VP (anti-VP), bovine serum albumin (BSA) modified on the surface of the FTO in sequence. Ascorbic acid (AA) acts as an electron donor to combine photogenerated holes in order to provide a stable current system. Ho 3+ and Yb 3+ co-doping TiO 2 broadened the spectral response range of TiO 2 to the infrared region and improved the photocurrent responsiveness of TiO 2 . The PEC immunosensor, with Ho 3+ /Yb 3+ ratio of 1:5, Ho 3+ /Yb 3+ -TiO 2 of 2 mg/mL and PBS solution of pH 7.4, had an optimal photocurrent responsiveness. Immobilization of anti-VP was by classical NHS/EDC coupling reactions between COOH groups of CdSe QDs and NH 2 groups of the anti-VP. The results indicated that PEC immunosensors had a low detection limit of 25 CFU/mL, a wide detection range of 10 2 –10 8 CFU/mL, high stability, low price, and short detection time. This method could be promising for the rapid and ultrasensitive detection of pathogenic microorganisms in the food.
研究领域:
生物传感
·
食品安全检测
·
微生物学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Zeyu Yin,Xiaobo Ma,Lijian Ni,Huaijun Sun,Yueyue Wang
The PEC sensor constructed from wide-bandgap Ga₂O₃ and narrow-bandgap CdS for enhanced tetracycline (TC) detection, overcoming conventional limitations like low sensitivity and complex operation. CdS/Ga₂O₃ composites were synthesized via a one-step hydrothermal method, enabling efficient separation and transport of photogenerated carriers through band modulation. Compared with pure CdS or Ga₂O₃, the heterojunction exhibited a sixfold photocurrent enhancement, improved response time, and superior stability. The sensor demonstrated excellent repeatability (RSD = 0.359%), selectivity, and sensitivity for TC concentrations from 1 pM to 50 μM, achieving a low detection limit of 0.045 μM. Tests on lake and river water confirmed high practical applicability, with RSD<2%. To further improve detection accuracy, three machine learning algorithms—SVR, Random Forest, and XGBoost—were applied to photoelectric response data across TC concentrations, using cross-validation and feature selection to build predictive models. Random Forest outperformed others, offering the best error evaluation and fitting accuracy while reinforcing the linear correlation between TC concentration and photoelectric response. This work provides new insights into quantitative antibiotic detection and underscores the potential of heterojunction engineering for PEC sensor optimization.
研究领域:
环境监测
·
分析化学
·
材料科学
·
光电化学
·
机器学习应用
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2026
·Vol. 42
·期 29
·21058-21070
·
IF 4.4
Yu Hai,Liang Xiaoyan,Yu Xinchen,Guo Enhui,Wang Congrong,Lv Jianguo,Zhang Miao,Yang Lei,He Gang
Photoelectrocatalytic (PEC) technology integrates the
advantages
of both photocatalysis and electrocatalysis. It utilizes semiconductors
to absorb sunlight as an energy source and applies a potential to
facilitate the timely and directional transfer of photogenerated electrons,
effectively achieving the physical separation of the photoanode and
cathode. This is widely considered a primary factor in improving catalytic
efficiency. In this study, In 2 S 3 thin films
and Au particles were prepared by hydrothermal and electrochemical
deposition for robust attachment to TiO 2 nanorods based
on a fluorine-doped tin oxide (FTO) substrate, which greatly improves
carrier transfer during the PEC process. The results showed that the
cutoff wavelength of Au–In 2 S 3 /TiO 2 was red-shifted to 535.6 nm. Under illumination without bias,
the photoelectric current density of Au–In 2 S 3 /TiO 2 reached 2.582 mA/cm 2 , 18-fold
that of TiO 2 . Linear sweep voltammetry results indicated
that under illumination at 0.8 V, the photoelectric current density
of Au–In 2 S 3 /TiO 2 was 7.956
mA/cm 2 , 24.7-fold that of TiO 2 , and 3.1-fold
that of Au–In 2 S 3 /TiO 2 under
illumination without bias (0 V). The methanol-assisted test to amplify
the hydrogen production signal revealed that, under illumination at
0.8 V bias (vs Ag/AgCl), the methanol-assisted hydrogen production
rate of Au–In 2 S 3 /TiO 2 was
2.51 mL/cm 2 , 3-fold higher than that under illumination
alone (0.71 mL/cm 2 ). This study provides new insights for
methanol-assisted PEC hydrogen evolution reactions and serves as a
reference for the design of high-performance photocatalysts.
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Zilong Xu,Song Chen,Bingqian Zu,Xudong Wu,Guoqiang Liu,Liang Wu
Precise control over the stoichiometry and phase of tin sulfide (SnSx) nanomaterials is critical for their potential applications in energy conversion and storage devices, which remains challenging. Here, we report a precursor-mediated colloidal method to achieve phase-controlled synthesis of single-crystalline (SC) SnSx nanosheets. By employing Sn(acac)2Cl2/S and SnCl2·2H2O/1-DDT as precursors, hexagonal SC SnS2 nanosheets and orthorhombic SC SnS nanosheets were successfully synthesized, respectively. The photoelectrochemical (PEC) performance of both samples as photoanodes for water oxidation was further studied. The SC SnS2 nanosheet photoanode achieves a PEC performance of 1500 μA cm–2 at 1.23 VRHE with a half-cell solar-to-hydrogen conversion efficiency of 0.85%, outperforming the SC SnS nanosheet photoanodes. Meanwhile, this precursor-mediated method can be readily extended to the phase- and stoichiometry-controlled synthesis of other 2D nanomaterials, which hold great potential in photocatalysis and photoelectrochemical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）