Advanced Powder Materials
·
2021
·
IF 0
Xingsheng Hu,Yan Li,Xinxin Wei,Lei Wang,Houde She,Jingwei Huang,Qizhao Wang
The cobalt−carbonate (CoCi)/NiFeOOH double-layer co-catalyst was prepared on bismuth vanadate (BiVO 4 ). Compared with the same type of electrode (Co−Pi/NiFeOOH/BiVO 4 and Co−Sil/NiFeOOH/BiVO 4 ), the photoelectrochemical (PEC) performance of the composite electrode presents the most excellent performance. The Co−Ci/NiFeOOH/BiVO 4 electrode prepared by photoelectric deposition (PED) achieves a photocurrent density of 4.1 mA/cm 2 at 1.23 V vs RHE, and the applied bias photon-current efficiency (ABPE) is up to 0.95%. In addition, with the help of the equivalent circuit fitting in electrochemical impedance spectroscopy (EIS), the charge transfer resistance ( R ct ) of Co−Ci/NiFeOOH/BiVO 4 is only 108.9 Ω, which is 16% that of BiVO 4 . The enhanced PEC performance of Co−Ci/NiFeOOH/BiVO 4 in the double-layer cocatalyst system is attributed to the outstanding advantages of Co−Ci cocatalyst in oxygen vacancy defects, superior to other cobalt-based catalysts in promoting charge transfer and improving the kinetics of water oxidation. This makes Co−Ci co-catalyst become one of the favorable competitors in the field of photoelectric catalysis.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
DOI
Surfaces and Interfaces
·
2025
·
IF 6.3
Haowen Dong,Mengnan Ruan,Chengyi Wang,Tingting Zhong,Miao Zhou,Zhifeng Liu
In 2 S 3 is a promising pyroelectric material and its internal polarization field strength has a significant effect on pyro-PEC catalytic performance. Therefore, effective strategies to enhance the polarization strength of the materials play a crucial role in improving the pyro-PEC performance. Here, sulfur vacancies were introduced by simple treatment of the material with vinylpyrrolidone (PVP) solution to study the effect of sulfur vacancy introduction on the thermoelectrocatalytic properties of In 2 S 3 and the mechanism of action is analyzed. It is shown that the current density of In 2 S 3 photoanode with introduction of sulfur vacancies in the hot and cold cycling field at 1.23 V vs.RHE reaches 1.07 mA∙cm -2 , which is 3.15 times higher than that of bare In 2 S 3 . After the introduction of light, the current density reached a maximum value of 2.29 mA∙cm -2 at 1.23 V vs.RHE. It is shown that the introduction of sulfur vacancies not only changes the distribution of dipole moments between In-S, but also increases the distribution of interfacial charges with enhanced polarization effects. Meanwhile, sulfur vacancies triggered an increase in In 2 S 3 surface defects, which promoted the surface polarization behavior and enhanced the response of the material to temperature changes. This study provides a new idea for coordinated catalysis with thermal-optical-electrical multiple external field coupling.
研究领域:
材料科学
·
纳米技术
·
催化
·
固体物理
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xin Xu,Qingwu Wang,Xiaodong Xu,Qiaoyi Han,Xiaojuan Nie,Xu Ding,Xia Liu,Junqing Li,Qiang Shi,Hongxing Dong
Multifunctional wound dressings are promising medical materials for various applications. Among them, dressings with antimicrobial activity , high biosafety, and real-time monitoring have attracted considerable research interest. Herein, a biodegradable hemostatic sponge comprising a chitosan skeleton and polyelectrolyte–surfactant complex (CS–PEC) was developed as a versatile wound dressing for wound pH monitoring and inhibition of bacterial infection. CS–PEC sponge with high porosity exhibited satisfactory fluid absorption capacity and biocompatibility, along with antibacterial properties against E. coli and S. aureus . In vivo experiments in rat liver trauma model revealed that wounds treated with the CS–PEC sponge recorded less blood loss (97.1 mg) and shorter hemostasis time (27.2 s) than those treated with commercial gelatin sponge (309.1 mg and 163.5 s, respectively). Furthermore, PECs based on unconventional luminescent molecules ( L -C 16 -Hyp) were used as pH fluorescent indicators, which endowed the sponge with fluorescence-responsive behavior to wound pH changes in the range of 5.0–8.5. Visual images can be captured using a smartphone and converted to RGB color mode values for on-site assessment of wound status. This study sheds light on the design and application of unconventional luminescent materials in wound dressing and provides a smart and effective solution for wound management.
研究领域:
生物材料
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医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2024
·
IF 2.4
Hao Yuliang,Zuo Xiaolei,Zhao Weiyi,Wu Jichuan,lin Xiaoqiang,Wang Hongyan,Wang Zeshan,Hao Chuanxiang,Xue Song
Cuprous oxide (Cu 2 O) is a highly promising photocatalyst that facilitates efficient water splitting and hydrogen production under light conditions. In this study, Cu 2 O thin film photocathodes were prepared through electro-deposition, with the inclusion of \(\mathrm{NO}^{-}_{3}\) ions resulting in the formation of a flower-like microstructure. The size, distribution and roughness of these clusters were found to be greatly influenced by the concentration of the \(\mathrm{NO}^{-}_{3}\) ions as confirmed by SEM and AFM characterizations. When 0.4 M \(\mathrm{NO}^{-}_{3}\) ions were used, a flat and compact structure with the smallest ‘flower bud’ was obtained. This structure achieved a maximum photocurrent density of − 2.90 mA/cm 2 @0 V vs. RHE, which is 2.2 times greater than that of bare Cu 2 O. UV–Vis absorption, steady-state fluorescence spectroscopy and EIS measurements suggest that the compact microstructure facilitates enhanced ultraviolet absorption and separation of photogenerated holes and electrons. This results in a lower charge transfer resistance and a significant increase in photocurrent density. Additionally, a growth mechanism for the flower-like Cu 2 O was proposed. The XPS and EDS analyses indicate that the addition of \(\mathrm{NO}^{-}_{3}\) during Cu 2 O formation results in the adsorption of \(\mathrm{NO}^{-}_{3}\) onto the surface of the initial Cu 2 O grain. This, in turn, catalyses the electrocatalytic reduction of \(\mathrm{NO}^{-}_{3}\) on the surface of Cu 2 O, leading to the formation of NH + 4 ions as evidenced by XPS.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Meixian Li,Jun Liu,Tao Zhang,Nina Liang,Lijuan Yan,Fengzhen Lv,Wenjie Kong,Fuchi Liu,Lizhen Long
The construction of semiconductor heterojunctions is an effective approach to enhance the performance of optoelectronic devices. In this study, graphene-quantum-dots (GQDs) were grown on ZnO nanorods arrays in - situ to form intimate heterojunctions. The fabricated photoelectrochemical (PEC) photodetector based on ZnO/GQDs heterojunctions displayed good self-powering characteristics, with an on/off current ratio of approximately 21 at zero bias, which was almost seven-fold higher than that of the bare ZnO device. The responsivity and detectivity of the ZnO/GQDs-based photodetector were also enhanced compared with those of bare ZnO devices. A unique type-II band alignment was established at the ZnO/GQDs heterojunction interface, which facilitated the carrier transfer. Moreover, the ZnO/GQDs heterojunction reduced the passivation of the surface states, resulting in large energy-band bending and an internal electric field at the semiconductor/electrolyte interface, which provided a powerful driving force for the separation and transport of photogenerated carriers. These combined effects enhance the performance of the photodetector, indicating that this approach can be used to fabricate high-performance PEC optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zaofen Wang,Di Yang,Yunzhu Tan,Xu Liu,Xinyu Zhang,Zhenchao Wang,Danping Chen,Bingqian Liu
A rapid photoelectrochemical (PEC) sensor was constructed for nitrite detection in food based on the one-step chemical etching strategy of BiOCl/Zn 0.5 Cd 0.5 S (BOC/ZCS) nanocomposites by nitrite. BOC/ZCS heterojunction was prepared by a simple coprecipitation method, and it was found that BOC/ZCS showed significant photoelectrochemical (PEC) activity. The results of this study confirmed that the decrease in the photocurrent of the sensor was linked to the etching of ZCS by nitrite under acidic conditions. Under optimized conditions, the BOC/ZCS-based PEC sensor showed good analytical properties for detecting nitrite, with linear ranges of 1–100 μM and 100–600 μM. The detection limit of the sensor was 0.41 μM (S/N = 3). Excellent repeatability, reproducibility, low background noise, and immunity to interference were demonstrated using the proposed system, and satisfactory results were achieved for the nitrite assay using real samples. These results demonstrate a new method for nitrite detection developed using the proposed PEC sensor.
研究领域:
分析化学
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材料科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Qiyuan Chen,Lu Liu,Lifen Liu,Yizhen Zhang
Emissions of volatile organic compounds (VOCs) air pollutants could worsen air quality and adversely affect human health, thus developing more efficient low-temperature VOCs removal techniques is desired. A novel continuous system integrating UV-assisted photo-electrochemical catalysis with microbial fuel cell (UV-assisted PEC-MFC) has been established for promoting removal of gaseous ethyl acetate or toluene and generating electricity simultaneously. In this system, CeO 2 /TiO 2 /ACF catalytic cathode is prepared and used for combination with bio-anode for accelerating cathodic reaction . This UV-assisted PEC-MFC system exhibits an excellent elimination capacity (EC) of ethyl acetate (∼0.39 g/m 3 , EC: ∼2.52 g/m 3 /h) or toluene (∼0.29 g/m 3 , EC: 1.89 g/m 3 /h) under close-circuit condition. Furthermore, an outstanding elimination capacity (EC: 28.04 g/m 3 /h) for high concentration toluene (∼4.10 g/m 3 ) removal is obtained after toluene gas passes sequentially through the catalytic cathode then the bio-anode. This way of PEC degradation and biodegradation, avoids inhibition of exoelectrogens activity from toxicity of high concentration toluene. Simultaneously, the cell voltage of UV-assisted PEC-MFC system is stable at 0.11 V (vs. SCE) and 1.452×10 −4 kWh is generated from treatment of toluene gas stream in 6 h duration time. The possible mechanism of VOCs removal in this novel system has been proposed and discussed. This study provides new technical basis for treating gaseous pollutants via integrating photo-electrochemical catalysis with electricity generating microbial fuel cell for energy conversion.
研究领域:
环境科学
·
生物技术
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Jinhui Liu,Jing Cheng,Wanqing Wu,Jiaqi Niu,Ziyang Zhang,Ping Guo,Min Du
The rapid detection of polyethylene terephthalate (PET) nanoplastics (PET NPs) is hindered by their low concentration, high mobility and lack of a distinguishable interface with other nanoplastics. In this study, we developed an SnS 2 @MoS 2 /APTES amino-functionalized photoelectrochemical sensor capable of detecting PET NPs with high specificity. The SnS 2 @MoS 2 heterojunction synthesized via in situ hydrothermal synthesis and the APTES self-assembled amino-functionalized interface enable PET NPs to interact with amino-functionalized interface at multiple sites through oxygen-containing groups such as ester groups, carbonyl oxygen and ether oxygen. The sensor exhibits a detection range of 0.5-800 μg mL −1 for PET NPs, with a detection limit of 0.17 μg mL −1 . DFT calculations further indicate that the PET-APTES system exhibits a lower adsorption energy (−1.37 eV) and a more significant interfacial charge rearrangement, demonstrating that the APTES amino siloxane interface exhibits a polymer structural selectivity toward PET. Furthermore, this PEC sensor exhibits good recovery rates (96.04%-102.76%) in practical water samples such as seawater, bottled water and tap water. It provides a new method for interface recognition and signal conversion for the specific PEC detection of PET nanoplastics.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shenghao Zhang,Meiling Zhang,Yinhao Zhang,Yingxia Zong,Xu Hun
Here, we designed a catalytic DNA assembly (CDA) amplification strategy to construct a photoelectrochemical (PEC) assay to detect the specific target F3L-gene of Monkeypox Virus (MPXV). Graphdiyne (GDY) and CuSe were synthesized by a surface-assisted deprotection/polymerization method and hydrothermal method, respectively. Then AuNPs and GDY/CuSe nanocomposites were modified on the surface of gold electrode (GE). The hairpin DNA4 (H4) was incubated onto the surface of the electrode by Au-S bond. When the target was present, the CDA was occurred by hairpin DNA1 (H1) and hairpin DNA2 (H2). Then, DNA3 (H3) hybridized with the single stranded region of H1-H2 complex, formed a site that can be hydrolyzed by exonuclease III, led to exonuclease III hydrolysis of DNA and to release the H3 primer (H3P). H3 further opened H4 and triggered a subsequent CDA reaction, ultimately formed a Y-shaped DNA structure on the electrode surface with the help of DNA5 (H5) and DNA6 (H6). The two end sequences of H4 and H6, which constituted the Y-shaped structure, were designed as split H3P fragments. They can be used as primers to trigger CDA reactions for more efficient and characteristic autocatalytic signal amplification. The Y-shaped structure carried H5-ALP, and catalyzed phosphonoxyphenol ( o -PP) to generate benzene-1,2-diol (CA), which could enhance the PEC signal. The linear range is 0.1 fM-10.0 pM with the detection limit of 0.05 fM (3S/N) for MPXV.
研究领域:
生物医学
·
分子诊断
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Yanjie Chen,Shupei Zhang,Hong Dai,Zhensheng Hong,Yanyu Lin
A flexible two-step photoelectrochemical (PEC)–colorimetric immunoassay was proposed for ultrasensitive detection of lipolysis stimulated lipoprotein receptor (LSR) which is found to be closely related to ovarian cancer (OC). In this paper, the Cu nanoclusters (CuNCs) enhanced multiple mixed TiO 2 mesocrystals junction (MMMJ) was fabricated via effective combination of multiple different phases TiO 2 mesocrystals (Anatase and Rutile) layers and used as a sensing platform. The strong interaction between different phases layers caused multiple amplification of signal and introduction of Cu NCs further improve PEC properties and catalytic activity to hydrogen peroxide (H 2 O 2 ) what can catalyze lecuo-methylene blue (lecuo-MB) from colorless to blue. As antibody and target antigen captured onto the MMMJ in turn, both PEC properties and catalytic activities were inhibited, leading to decreased photocurrent responses and multiply vivid color variations in lecuo-MB functionalized colorimetric films. Thus, a versatile dual-modal sensing system was developed just by utilizing enhanced MMMJ as a photoelectrode and lecuo-MB as a color change reporter molecule for PEC and colorimetric monitoring of target. Combing all of these advantages, the designed dual-modal immunoassay considerately reduced false positive or negative results during the measurement, and the unique approach for MMMJ construction may also provide a valuable guidance for designing other mixed phase junctions with superior PEC performance.
研究领域:
生物化学
·
分析化学
·
癌症研究
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Zhengzheng Zhao,Zhifang Wu,Xueling Lin,Fangjie Han,Zhishan Liang,Likun Huang,Mengjiao Dai,Dongxue Han,Lipeng Han,Li Niu
A simple low-cost label-free photoelectrochemical (PEC) biosensing platform based on red blood cell shaped BiVO 4 modified g-C 3 N 4 was designed for tetracycline detection under room temperature. The prepared g-C 3 N 4 /BiVO 4 heterojunction not only demonstrated a high surface area, excellent physicochemical stability and favorable PEC activity, but also can be employed as nanostructure support for aptamers to construct a visible-light-driven PEC aptasensor due to rich π-π accumulation sites. More importantly, the proposed PEC aptasensor showed a favorable linear toward tetracycline in the range from 5 × 10 -9 to 2 × 10 -7 M with a detection limit of 1.6 nM, which well covered the Food Standards Testing requirements. Practical food sample analysis further revealed the accuracy and feasibility of the g-C 3 N 4 /BiVO 4 heterostructure based PEC platform. It is expected that such a label-free and cost-effective PEC strategy should act as a promising candidate for tetracycline determination in food quality control and supervision.
研究领域:
分析化学
·
食品科学
·
光电化学
·
生物传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jun Wang,Yining Pan,Liangxing Jiang,Min Liu,Fangyang Liu,Ming Jia,Jie Li,Yanqing Lai
Copper ions are not only physiologically essential for life but also hazardous materials causing a series of neurodegenerative diseases. Photoelectrochemical (PEC) detection has attracted a large amount of focus as a potential strategy to develop Cu2+ ion sensors. However, relatively low photocurrent signals with poor antidisturbance ability and the limited concentration range have prevented its practical applications. Here, we designed a WO3/CdS heterojunction photoanode for the PEC determination of Cu2+ in aqueous solution through a simple two-step chemical bath deposition method. The obtained WO3/CdS photoanode had a nanoplate morphology and showed an enhanced photoresponsivity with a photocurrent density of 1.5 mA/cm2 at 1.23 V versus RHE under illumination. Naturally, it exhibited a low detection limit (0.06 μM) and wider range (0.5 μM to 1 mM) for Cu2+ PEC detection first, suggesting that the WO3/CdS heterojunction photoanode is a promising tool to monitor copper pollution in natural environments.
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
危险品化学品经营许可证（带存储）