ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Tao Jiang,Wenzhong Wang,Yue Bi,Yujie Liang,Junli Fu,Lijuan Wang,Qing Zhou
Photoelectrochemical (PEC) hydrogen evolution from water splitting of semiconductor photoanodes is intricately linked to their light-absorbing capacity, surface reaction kinetics, bulk charge carrier separation efficiency, and surface charge carrier injection efficiency. Harnessing the surface plasmon resonance effect of metals emerges as a promising approach to enhance PEC performance of semiconductor photoanodes. This work presents the first application of non-noble metal Al nanoparticles to sensitize a BiVO 4 nanoporous film (NPF) photoanode. This process significantly expedites the surface kinetics of water oxidation, and improves both bulk charge carrier separation and surface carrier injection efficiencies of BiVO 4 NPF photoanode. Additionally, the surface-formed Al 2 O 3 film effectively preserves the stability of photoanode, leading to a substantial improvement in PEC hydrogen evolution of BiVO 4 NPF photoanode in a three-electrode PEC cell with sulfite scavenger. The constructed BiVO 4 /Al NPF heterojunction photoanode exhibits a hydrogen evolution rate of 73.9 µmol cm⁻ 2 h⁻¹ at 1.23 V versus reversible hydrogen electrode, 1.68 times of BiVO 4 photoanode. Additionally, BiVO 4 /Al NPF photoanode exhibits excellent stability under long-time light irradiation of 8 h. This study provides valuable insights into the design of nonnoble-metal-based plasmonic photoanodes for efficient hydrogen generation through PEC cell from the perspectives of surface reaction kinetics, charge carrier injection, and separation.
研究领域:
材料科学
·
电化学
·
可再生能源
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Yunfei Tang,Yun Chai,Xiaoqiang Liu,Lele Li,Liwei Yang,Peipei Liu,Yanmei Zhou,Huangxian Ju,Yunzhi Cheng
In this work, a CuS-TiO 2 heterojunction composite was prepared by dispersedly depositing CuS nanoparticles on TiO 2 nanospheres surface with a hydrothermal method , and was then used to construct a photoelectrochemical (PEC) aptasensor for sensitive detection of microcystin-LR (MC-LR) in aquatic environment. The energy bands of CuS nanoparticles and spherical anatase TiO 2 were well matched, which enhanced the photo-to-current conversion efficiency. The composite exhibited the enhanced visible light absorption , the improved separation of photo-generated charges, and the reduced self-aggregation of CuS nanoparticles, leading to the enhanced photocurrent response. The PEC aptasensor was constructed by immobilizing CuS-TiO 2 composite on ITO electrode with chitosan film that further covalently bound aminated aptamer. After the target, microcystin-LR (MC-LR) as an analyte model, was captured by the aptamer on the aptasensor, it could be oxidized by the photo-generated hole to impede the electron-hole recombination and further amplify the photocurrent. The PEC aptasensor showed superior analytical performance for MC-LR with a linear range of 5.0 × 10 −5 nM to 250 nM and a detection limit of 2.0 × 10 −5 nM. The detection results with the aptasensor for practical water samples indicated its promising application in environmental monitoring.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Zuxing Zhang,Liying Zhai,Mingqing Li,Jiahui Wu,Li Li
The obtained RGO/BiVO 4 composites were first applied to tetracycline hydrochloride (TCH) photoelectrochemical (PEC) monitoring platform. The RGO/BiVO 4 nanocomposites exhibited higher PEC activity, which benefited from the accelerated electron transfer induced by loading of RGO. The RGO/BiVO 4 electrode exhibited a linear response in the concentration range of 0.1 μM – 1 mM with a sensitivity of 45 μA mM cm −2 and a detection limit of 0.922 μM. Furthermore, the designed RGO/BiVO 4 PEC sensor exhibits good reproducibility, long-term stability and selectivity. In summary, the designed materials have outstanding electrochemical properties, which provide ideal candidates for PEC detection of TCH.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 6
·2376-2384
·
IF 7.367
Tao Yang,Wenna Liu,Lidong Li,Junhong Chen,Xinmei Hou,Kuo-Chih Chou
Aiming to achieve the synergistic enhancement of the surface-enhanced Raman scattering (SERS) and photoelectrocatalytic (PEC) performance on a noble metal–semiconductor, such as Au nanoparticles (NPs)–TiO2 nanotube arrays (TiO2 NTAs@hybrid Au NPs), theoretical calculation and experiments are performed. Theoretical calculation indicates that both the SERS and PEC performance can be enhanced by coupling different sized Au NPs on TiO2 NTAs based on synergizing the multiple plasmon resonance coupling and quantum effects. To further verify this mechanism, TiO2 NTAs@hybrid Au NPs are assembled via synthesis of TiO2 NTAs through the anodic oxidation process, followed by the deposition of different sized Au NPs onto the TiO2 surface simultaneously using physical vapor deposition (PVD) in this work. Such substrates exhibit excellent detection sensitivity towards organic dyes including Rhodamine B (RhB), the organic herbicide dichlorophenoxyacetic acid (2,4-D) and the organophosphate pesticide methyl-parathion (MP) with high reproducibility, stability and reusability. Meanwhile the PEC performance based on this substrate remains efficient compared with the reported results in the literature. The efficient PEC performance mainly originates from both the quantum effect of Au nanoparticles and the formation of a metal–semiconductor heterojunction. It is proposed that other noble metal–semiconductor complex nanomaterials can also obtain both enhanced SERS and PEC performance based on the above mechanism.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Small
·
2026
·
IF 11.8
Tianyu Jia,Mengnan Ruan,Chengyi Wang,Li Zhou,Zhifeng Liu
Efficient piezo-photoelectrochemical (Piezo-PEC) water splitting is critical for sustainable hydrogen production, yet its performance is largely constrained by sluggish charge separation and inefficient mechanical-to-electrical energy conversion. Here, we introduce a defect polarization-metal anchoring strategy by selectively anchoring Ni at Ba-vacancy-rich regions of BaTiO 3 to achieve efficient Piezo-PEC water splitting. Experimental characterizations and density functional theory (DFT) calculations reveal that Ba vacancies reconstruct the local coordination environment of Ti sites, promoting Ti 3+ formation and TiO 6 octahedral distortion to enhance lattice polarization and the piezoelectric built-in electric field. Ni anchoring further enhances Ti 3d-Ni 3d-O 2p orbital hybridization and Ti─O covalency, forming Ni 2+ /Ti 3+ dual active sites. The enhanced covalency establishes delocalized electron transport pathways to suppress bulk carrier recombination, while the dual active sites accelerate the proton-coupled electron transfer (PCET) via Ti─O─Ni bridges. The reinforced piezoelectric field synergistically couples with the photogenerated field to promote efficient charge separation. Benefiting from these cooperative effects, the Ni/BTO-Ba V photoanode delivers a photocurrent density of 2.21 mA cm −2 at 1.23 V RHE under ultrasonic-light coupling, with a piezoelectric coefficient (d 33 ) of 65.13 pm V −1 . This work establishes a universal guideline for synergistic modulation of defect polarization and metal sites, guiding the rational design of high-performance photoelectrodes.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Changlin Li,Yanfang Wang,Shangrong Chen,Wei Zhang,Zi Wang,Zhongyu Hou
The erosion issue of ZnO nanorod arrays (NRAs) film is the major obstacle in surface sensitization of ZnO NRAs grown on Zn foil substrate for photoelectrochemical (PEC) applications. In this paper, PEC performance of ZnO NRAs grown on Zn foil substrate was greatly enhanced by coating ZnSe and CdSe on the surface of ZnO NRAs. Dense ZnO NRAs were in - situ grown on seed-free Zn foil substrate in a NH 3 ·H 2 O and NaOH hydrothermal system. ZnSe/CdSe co-sensitized ZnO heterostructures were then successfully synthesized using ZnO NRAs as precursors by two successive in - situ ion exchanges without damaging Zn foil and ZnO NRAs film. To obtain optimal photoconversion efficiency, anion exchange time and temperature were optimized. ZnO/ZnSe/CdSe heterostructures with optimized structure were shown as a layer of compact ZnSe/CdSe nanofilm conformally and uniformly coated on ZnO NRAs, which leads to efficient separation of photogenerated carriers , significant enhancement in visible-light absorption, and excellent PEC performance with photocurrent density of 3.008 mA/cm 2 (−0.2 V vs . Ag/AgCl) and photoconversion efficiency of 1.99% (0.418 V vs . RHE in polysulfide electrolyte solution), 27.55 and 40.61 times higher than those of ZnO NRAs, respectively.
研究领域:
材料科学
·
光电化学
·
纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Liwei Yang,Xiaoqiang Liu,Lele Li,Si Zhang,Hejie Zheng,Yunfei Tang,Huangxian Ju
This work designed a MgIn 2 S 4 -TiONA heterojunction by growing MgIn 2 S 4 nanoplates on TiO 2 nanowire array (TiONA) for preparation of visible light photoelectrochemical (PEC) sensing platform. The heterojunction exhibited strong absorption of visible light, large surface area and high loading of biomolecules , leading to high sensing sensitivity. Using adenosine triphosphate (ATP), a marker of cell vitality, as the target model, a PEC sandwich aptasensor was constructed by immobilizing capture DNA 1 on MgIn 2 S 4 surface. In the presence of ATP and signal DNA 2 with terminal ferrocene as the electron donor , a sandwiched DNA 1 -ATP-DNA 2 complex could be formed on the PEC aptasensor. The aptasensor showed excellent performance with a wide linear range from 50 fM to 100 nM and a detection limit of 20 fM. The sensing performance including specificity, reproducibility, stability and practical use were also evaluated, showing promising application of the MgIn 2 S 4 -TiONA heterojunction in PEC biosensing.
研究领域:
分析化学
·
生物传感器
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Xueming Dang,Zhilian Song,Huimin Zhao
A novel photoelectrochemical (PEC) sensing strategy with an amplified signal was proposed based on polypyrrole/g-C 3 N 4 /WO 3 inverse opal photonic crystals triple heterojunction. The sandwich-type detection model was applied to increase the sensitivity and favor the assembly of heterojunction structure. The heterojunction among PPy, g-C 3 N 4 and WO 3 highly improved the separation of photo-generated charges. Meanwhile, WO 3 IOPCs with good optical performance were employed to enhance the light absorption of PEC detection electrode. With the simultaneous combination of these amplification techniques, the designed PEC sensor achieved high sensitivity with low limit of detection (LOD) as 0.004 nM (≈ 1.99 ng L −1 ) and admirable selectivity in the detection of oxytetracycline under visible light irradiation.
研究领域:
分析化学
·
材料科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Kang Zou,Yamin Fu,Ruiying Yang,Xiaohua Zhang,Cuicui Du,Jinhua Chen
By direct calcination of Cu 2+ -doped ZIF-8 in oxygen atmosphere, a new photoelectric material, CuO–ZnO heterojunction , was prepared. The morphology and structure were investigated in detail by several methods, such as scanning electron microscopy, transmission electron microscopy , nitrogen adsorption-desorption method and X-ray diffraction. Under visible light irradiation , CuO–ZnO heterojunction exhibits excellent PEC behavior in aqueous media with the presence of ascorbic acid (AA) and dissolved oxygen at −0.3 V. Taking the CA125-antibody functionalized CuO–ZnO heterojunction (CuO–ZnO-Ab 2 ) as a signal source, a novel photoelectrochemical (PEC) immunosensing platform was developed for ultrasensitive assay of CA125. Because of the target-induced introduction of photoelectric material to the sensing platform, the proposed PEC immunosensor has excellent performance for CA125 assay: near-zero background noise, wide linear response range (1 × 10 −5 U/mL to 100 U/mL) and low detection limit (3.16 × 10 −6 U/mL). The developed CuO–ZnO heterojunction and the related PEC sensing platform may have promising applications in ultrasensitive and highly accurate monitoring of various proteins in bioanalysis and disease diagnosis.
研究领域:
生物分析
·
医学诊断
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jiangping Jing,Zhuoyuan Chen,Yuyu Bu,Mengmeng Sun,Wenqiang Zheng,Weibing Li
SrTiO 3 is a promising material for the photoelectrochemical (PEC) cathodic protection technology due to its intrinsic band structure . Its disadvantage of light absorption only in the ultraviolet region can be effectively solved by Cr doping. The Cr dopant usually exists as two states of Cr 3+ and Cr 6+ , among which the latter one usually behaves as the trapping center for the photoinduced electrons and leads to the decrease of the PEC performance. In this paper, a hydrogen treatment process is performed on the Cr-doped SrTiO 3 to reduce the Cr 6+ . It is verified that hydrogen treatment reduces Cr 6+ to Cr 3+ , leading to the increase of the concentration of the charge carriers and the decrease of the charge transfer resistance. And also, hydrogen treatment induces the formation of oxygen vacancy , which leads to the negative shift of conduction band potential and the increase of the concentration of the charge carriers. The effect of the hydrogen treatment temperature is further studied in this work. Higher temperature will promote the reduction degree of Cr 6+ and increase the concentration of oxygen vacancy . However, hydrogen treatment with excessively high temperature will induce too high concentration of oxygen vacancy, which would act as the recombination centers of the photogenerated charge carriers, suppress the mobility conduction and thus lead to the decrease of the PEC performance. Therefore, benefiting from the Cr 6+ reduction and modification with appropriate concentration of oxygen vacancy, the Cr-doped SrTiO 3 with hydrogen treatment at 250 °C shows the optimal PEC cathodic protection performance in NaCl solution.
研究领域:
材料科学
·
电化学
·
光电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lu Zhang,Meng Zhang,Xiaozhe Song,Hui Wang,Zhaoyong Bian
Here, we report enhancement of the photoelectrochemical (PEC) performance of MnO x /graphite-like carbon nitride (g-C 3 N 4 ) nanocomposites synthesized by one-step thermal decomposition for degradation of clofibric acid (CA). MnO x showed enhanced broadband ultraviolet–visible light regions, efficient charge generation–separation, and enhanced PEC performance when combined with g-C 3 N 4 . Photogenerated holes can be efficiently captured by introducing Mn 2+ /Mn 3+ /Mn 4+ valence band transitions. In addition to a good visible-light response, the MnO x /g-C 3 N 4 -10 (g-C 3 N 4 with 10% Mn(NO 3 ) 2 ·6H 2 O) photoanode showed enhanced photocurrent density of 0.03 × 10 −3 A cm −2 at 0.63 V vs. Ag/AgCl, which was approximately 100 times that of pristine g-C 3 N 4 . The superoxide radical and positive holes played dominant roles in PEC degradation of CA. The MnO x /g-C 3 N 4 -10 photoanode showed the highest photoelectrocatalytic performance under acidic conditions because of electrostatic attraction between the electrode and CA. The CA degradation ratio using the MnO x /g-C 3 N 4 -10 photoanode was 100% under visible light in 6 h at pH = 3. This work provides a simple and sustainable strategy to modify g-C 3 N 4 for captured holes to improve PEC degradation of CA, and it is promising for application to different materials in a variety of fields.
研究领域:
材料科学
·
环境科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 7
·1403-1409
·
IF 5.227
Yaru Li,Guang Liu,Daizong Ji,Yan He,Qingmei Chen,Fenni Zhang,Qingjun Liu
As an important amino acid, cysteine is related to the development of various diseases. The quantitative detection of cysteine is of great significance for both disease diagnosis and treatment. The current labeling methods mainly rely on fluorescent probes, making it difficult for quantitative cysteine detection in point-of-care testing (POCT). In this study, we proposed a label-free method for cysteine quantification by novel photoelectrochemical (PEC) sensing using a specific ion chelation probe. An indium tin oxide electrode loaded with nanoscale graphitic carbon nitride (g-C3N4) was used as the PEC electrode and gold nanoparticle modification was performed to further promote the charge transfer efficiency for enhanced photocurrent detection. Cadmium ions (Cd2+) were employed as the specific ion chelation probe for cysteine detection, and the formed Cd2+/cysteine chelate complex served as the electron acceptor for sensitive PEC sensing under low-power LED illumination. A portable PEC system was developed for quantitative detection of cysteine by integrating the PEC sensor, a self-designed detection circuit and a smartphone. The detected photocurrents changed linearly with the cysteine concentrations ranging from 0 μM to 40 μM, and the limit of detection is calculated to be 9.2 μM. To demonstrate the capability of this system, cysteine in spiked urine samples was quantified with a recovery rate of 96.1%–100.57%. This system provides high portability, sufficient accuracy and sensitivity, and greatly reduces the complexity and cost of point-of-care cysteine detection.
研究领域:
分析化学
·
生物传感器
·
即时诊断
·
材料科学
✓ 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）