Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jize Wang,Ping Mu,Xiongzhuang Jiang,Shaowen cao,Bin Li,Yong Peng
In this study, we present a transparent perovskite-based photoanode consisting of a CsPbBr3-based photogenerated electric field layer and a Ni-Epoxy/Ni layer with integrated multifunctions of light transmission, sealing, charge conducting, and catalyzing. The Ni-Epoxy/Ni layer successfully constructed longitudinal charge transport channels and provided an interface with active sites, while achieving an average visible transmittance of more than 70%. For photoelectrochemical (PEC) water oxidation at 1.23 VRHE in 0.5 M KOH solution, the maximum photocurrent densities of the photoanode were 17.28 and 5.19 mA cm–2 when light was excited from the FTO and the multifunctional layer side, respectively, based on an actual working area of 2 cm2. The photoanode exhibited a 1450 mV shift of onset potential compared with the multifunctional layer. Due to the existence of a high built-in electric field, bias-free complete PEC water splitting was realized, and the peak photocurrent density was 0.46 mA cm–2. The multifunctional layer’s water resistance increased the photoanode’s working time from less than 1 min to more than 30 min.
研究领域:
材料科学
·
光电化学
·
太阳能转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yuhui Du,Xinqian Zheng,Yuan Ma,Fangjun Ge,Qiuyan Li,Hao Xiang,Xueyi Chen,Hai Zhou,Taolin Sun,Tingjian Chen
DNA-based biomaterials, including polyelectrolyte complex (PEC) hydrogels composed of DNA and other molecules, have received considerable attention due to their programmability and good biocompatibility. However, the cost for DNA synthesis is fairly high, especially for applications where a large quantity of DNA is needed. Construction of biomaterials using biomass-derived DNA is a feasible strategy to address this challenge. In this work, we fabricated and characterized PEC hydrogels with or without covalent cross-linking using biomass-derived DNA and chitosan (CS). Characterization results revealed detailed microstructures and mechanical properties of these two hydrogels, suggesting their potential application in DNA preservation and protein immobilization. We next developed a versatile DNA preservation strategy combining DNA-CS PEC hydrogel-based DNA encapsulation and chitosanase-mediated DNA release, which successfully maintained the integrity and functionality of various types of DNA, i.e., double-stranded DNA (dsDNA), single-stranded DNA (ssDNA), plasmid DNA, and genomic DNA, during the treatment of DNase I and hydrogen peroxide (H2O2). Remarkably, this method also demonstrated good efficiency in protecting DNA containing a broadly used unnatural base pair, dNaM-dTPT3, against the attack of silver ion. Additionally, we developed a convenient and reliable strategy for protein immobilization with the covalently cross-linked PEC hydrogel. This strategy demonstrated good performance in the reusability of the immobilized enzyme, evidenced by 56.4% product yield of the initial cycle of usage achieved by the immobilized horseradish peroxidase (HRP) in the tenth cycle of usage. This work not only broadens the application scope of biomass-derived polymers, but also provides feasible strategies for the sustainable and cost-effective preservation and immobilization of biological macromolecules.
研究领域:
生物材料
·
生物技术
·
纳米技术
·
生物化学
·
分子生物学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xing Cao,Qianxi Dang,Huanhui Chen,Yubin Zhao,Ya Liu,Junrong Zeng,Qing Ma,Liubiao Zhong,Dayou Wang,Yejun Qiu
To address the severe carrier recombination in BiVO 4 -based Photoelectrochemical (PEC) water splitting, we developed Fe-doped Ni nanocrystals (Fe:Ni NCs) through an organic liquid phase synthesis as an efficient cocatalyst. Through a dip-coating and annealing modification process, the optimized Fe:Ni/BiVO 4 photoanode achieved a remarkable photocurrent density of 4.72 mA/cm 2 at 1.23 V vs. RHE, representing a 4.07-fold enhancement over pristine BiVO 4 . In-situ Raman characterization revealed that Fe:Ni NCs on BiVO 4 underwent in-situ surface reconstruction to form a unique Fe:Ni@Fe:NiOOH core–shell structure during PEC reaction. The presence of Fe accelerated the conversion of Ni to active NiOOH at lower potential (0.25 V vs. RHE) compared to pure Ni NCs modified BiVO 4 photoanode (0.30 V vs. RHE). Mechanistic studies identified a dual activation pathway involving both applied potential and BiVO 4 valence band oxidation. Meanwhile, Fe:Ni NCs cores with high conductivity accelerated the migration and accumulation of holes into Fe:NiOOH shells, resulting in improved carrier injection efficiency and water oxidation kinetics. This work not only elucidates fundamental differences between PEC and electrocatalytic water splitting mechanisms but also provides a reference for designing high-performance PEC photoanodes.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能量转换
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Siyi Hong,Leiming Wu,Zizhen Xiao,Yinxiang Chen,Artem Kuklin,Huating Liu,Hans Ågren,Xiaohui Ren,Ye Zhang
Few-layer tin (Sn)-based nanosheets (NSs) with a thickness of ≈2.5 nm are successfully prepared using a modified liquid phase exfoliation (LPE) method. Here the first exploration of photo-electrochemical (PEC) and nonlinear properties of Sn NSs is presented. The results demonstrate that the PEC properties are tunable under different experimental conditions. Additionally, Sn NSs are shown to exhibit a unique self-powered PEC performance, maintaining a good long-term stability for up to 1 month. Using electron spin resonance, active species, such as hydroxyl radicals (·OH), superoxide radicals (·O 2 − ), and holes (h + ), are detected during operations, providing a deeper understanding of the working mechanism. Furthermore, measurements of nonlinear response reveal that Sn NSs can be effective for all-optical modulation, as it enables the realization of all-optical switching through excitation spatial cross-phase modulation (SXPM). These findings present new research insights and potential applications of Sn NSs in optoelectronics.
研究领域:
材料科学
·
纳米技术
·
光电化学
·
非线性光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Gengcheng Liao,Hui Qiao,Zongyu Huang,Siwei Luo,Yuan Ji,Yundan Liu,Xiang Qi
Designing a Z-scheme heterojunction is of great significance to achieve high separation of photogenerated carriers and strong photo-redox properties of two semiconductor materials . In photosynthesis, the effects of photocatalytic electrolytes (adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH)) on chemical energy has attracted numerous interests. In this case, developing photocatalytic electrolytes with more active site and efficient charge extraction and separation would be beneficial for superior photocatalytic activity in Z-scheme system. Herein, we synthesized a Black/Red (BP/RP) phosphorus Z-scheme hybrid via a feasible two-steps sonochemical method, and the adding photocatalytic electrolytes ATP and NADPH in KOH solution endow the system with new vitality in photocatalysis . Consequently, photoelectrochemical (PEC) tests demonstrated the as-prepared BP/RP Z-scheme hybrid exhibits enhanced photocurrent of 9 μA/cm 2 at 0.5 V compared to the sole RP, while adding NADPH and ATP, the photocurrent of BP/RP Z-scheme hybrid shows dramatic increment of 30 μA cm −2 at a bias potential of 0.6 V. The improved photocatalytic activity is ascribed to the abundant active sites, higher carrier mobility of the BP/RP Z-scheme system, as well as the efficient photogenerated carrier separation and the prolonged lifetime of photocatalytic electrolytes. This work demonstrated the photocatalytic electrolytes can meet the unity of coordination and efficiency of achieving efficient PEC catalytic in the Z-Scheme system, and provides positive ideas for the possibility and superiority for other 2D materials in the field of ultrafast Photonics , photodetectors , etc.
研究领域:
材料科学
·
光化学
·
电化学
·
光子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Zhonghua Yu,Lingting Huang,Jialun Chen,Ying Tang,Biyun Xia,Dianping Tang
This work designed a new photoelectrochemical (PEC) immunoassay for the ultrasensitive detection of alpha-fetoprotein (AFP) based on the flower-like β-In 2 S 3 @carbon dots (CDs). The photocurrent of the as-prepared heterogeneous nanostructure was enhanced significantly under ultraviolet (UV), visible (Vis) and near-infrared (NIR) irradiation thanks to the more generation of carriers and less electron-hole pairs recombination with CDs. The three-layer sandwich-like immunocomplex would be formed upon the target AFP existed, the ascorbic acid 2-phosphate (AA2P) was subsequently transformed into ascorbic acid (AA) owing to the catalysis of alkaline phosphatase-conjugated rabbit polyclonal anti-human AFP (ALP-Ab2). Without additional applied voltage, the photocurrent of the β-In 2 S 3 @CDs-modified electrode was positively correlated with the increasing AA level in the detection cell. Under optimal conditions, the developed PEC immunosensing platform exhibited good reproducibility and high sensitivity for the determination of target AFP within a dynamic working range from 0.5 to 50 ng mL −1 at a detection limit of 37.9 pg mL −1 . In addition, the method accuracy relative to human AFP ELISA kit was evaluated by analyzing human serum specimens, and a good match between two methods was obtained. Such the increasing photocurrent through full-spectrum responsive mode gives a new horizon to develop highly sensitive PEC immunoassay in early clinical diagnosis by monitoring disease-related biomarkers.
研究领域:
分析化学
·
生物医学工程
·
临床诊断
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2024
·
IF 5.8
Yuhong Guo,Binbin Guo,Zhaopeng Liu,Jian Li,Liming Gao,Hong Jiang,Jidong Wang
A novel photoelectrochemical (PEC) cytosensor for the ultrasensitive detection of circulating tumor cells (CTCs) was developed. The bio-inspired reduced graphene oxide (rGO) honeycomb film photoelectrode was fabricated via a “breath figure” method, followed by the self-assembly of a Bi2S3–MoS2 heterojunction. The resulting Bi2S3–MoS2 heterojunction-modified rGO honeycomb film was employed as a sensing matrix for the first time. Compared to the smooth rGO film, the significant enhanced photocurrent of the photoelectrode under visible light was attributed to its improved visible light absorption, increased surface area and enhanced separation efficiency of photo-generated electron–hole pairs, which met the requirements of the PEC sensor for detecting larger targets. By virtue of the photocurrent decrease due to the steric hindrance of MCF-7 cells, which were captured by an aptamer immobilized on the surface of the photoelectrode, a cytosensor for detecting CTCs was achieved, showing a wide linear range of 10–1 × 105 cells per mL and a low detection limit of 2 cells per mL. Furthermore, MCF-7 cells in human serum were determined by this PEC biosensor, exhibiting great potential in the clinical detection of CTCs.
研究领域:
生物传感器
·
纳米材料
·
癌症诊断
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Lili Zhao,Jiawei Zhou,Peipei Li,Shu Huang,Xiaohua Zhu,Youyu Zhang,Meiling Liu,Shouzhuo Yao
Human immunoglobulin G (HIgG) plays a significant role in diagnosing infections and monitoring autoimmune diseases. However, the development of sensitive and reliable sensing platforms remains a challenge. Based on the Ag 2 S/SnO 2 composites, a dual-mode sensing platform was developed using multifunctional CoOOH nanoflakes for the sensitive detection of HIgG through photoelectrochemistry (PEC) and colorimetry. In the PEC mode, Ag 2 S QDs boost the PEC activity of SnO 2 NFs and facilitate the subsequent antibody immobilization. Ascorbic acid (AA) captures holes in Ag 2 S/SnO 2 to enhance the photocurrent. CoOOH, acting as a secondary antibody label, forms a sandwich structure with the electrode. The loading of HIgG and CoOOH-Ab2 due to specific recognition of antigen-antibody, leads to the quenching of PEC signal. Various amounts of HIgG will bind with different amounts of CoOOH-Ab2, displaying a linear response within the range of 100 pg/mL∼10 μg/mL, with the detection limit of 2.2 pg/mL. In the colorimetric mode, CoOOH efficiently catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), and various amount of the sandwich biocomplexes formed with different HIgG levels lead to distinct color changes for visual detection. The linear response range is 500 pg/mL∼9.375 μg/mL with a lower detection limit of 0.29 ng/mL. The two independent modes with different mechanisms, based on the same PEC electrode, can validate each other and provide more scientific and reliable results in response to the targets. Thus, this dual-mode sensing platform for targets-induced signaling changes presents a novel strategy for bioanalysis and detection.
研究领域:
生物化学
·
分析化学
·
纳米技术
·
免疫学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 27
·16600-16607
·
IF 3.361
Jingran Xiao,Lingling Peng,Le Gao,Jun Zhong,Zhongliang Huang,Enxian Yuan,Vijayan Srinivasapriyan,Shu-Feng Zhou,Guowu Zhan
The charge separation/transport efficiency is relatively high in thin-film hematite photoanodes in which the distance for charge transport is short, but simultaneously the high loss of light absorption due to transmission is confronted. To increase light absorption in thin-film Fe2O3:Ti, commercial substrates such as Cu foil, Ag foil, and a mirror are adopted acting as back-reflectors and individually integrated with the Fe2O3:Ti electrode. The promotion effect of the commercial back-reflectors on the light absorption efficiency and photoelectrochemical (PEC) performance of the hydrothermally prepared Fe2O3:Ti electrodes with a variety of film thicknesses is investigated. As a result, Ag foil and the mirror show favorable and equal efficacy while the promoting effect of Cu foil is limited. In addition, the photocurrent increment achieved by the Ag back-reflector decreases linearly along with the logarithmic of the film thickness and the optimized film thickness of the Fe2O3:Ti electrode is decreased from 520 to 290 nm. The high durability of Ag foil in the alkaline electrolyte during solar light irradiation is demonstrated. Furthermore, the reflective substrate also shows a promotion effect on the BiVO4 photoanode and CuBi2O4 photocathode, as well as the unbiased photocurrent from a tandem cell constituted by TiO2 and CuBi2O4.
研究领域:
材料科学
·
光电化学
·
太阳能转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Jia Ding,Fei Liu,Chunling Qi,Yunlei Zhou,Huanshun Yin,Shiyun Ai
A novel photoelectrochemical (PEC) biosensor was constructed for DNA hydroxymethylation detection based on Bi 4 NbO 8 Cl/PTC-NH 2 heterojunction and Fe-MIL-88NH 2 , where Bi 4 NbO 8 Cl/PTC-NH 2 was employed as photoactive material and Fe-MIL-88NH 2 was adopted as artificial hydrogen peroxide mimic enzyme. Based on the structure of hydroxymethylated cytosine in DNA sequence, 5-hydroxymethyl-2’-deoxycytidine (5hmdC) was employed as detected target molecule for the first time using PEC technique. After Bi 4 NbO 8 Cl/PTC-NH 2 heterojunction was modified on the substrate electrode, thioglycolic acid (TGA) was captured by forming amide bond, where the sulfhydryl group (-SH) of TGA was employed as the specific recognition of 5hmdC. Under M. HhaI catalysis, the −CH 2 OH of 5hmdC reacted selectively with the –SH. Finally, Fe-MIL-88NH 2 was modified on the electrode based on the crosslinker of 4-formylphenylboronic acid (FPBA), where FPBA possessed two active groups of formyl and boronic acid group, reacting with glycosyl of 5hmdC and amino of Fe-MIL-88NH 2 . Under the catalysis effect of Fe-MIL-88NH 2 , the insoluble substance was produced on the surface of electrodes, resulting in distinct lessening of PEC response. Under optimal conditions, the photocurrent shows a linear relationship with the logarithm value of 5hmdC concentration from 0.01-100 nM with a low detection limit of 6.48 pM. More importantly, this method can be applied to investigate the influence of exogenous phytohormone on 5hmdC content in the genomic DNA of rice seedling roots and leaves.
研究领域:
材料科学
·
分析化学
·
生物传感器
·
生物化学
·
纳米技术
·
电化学
·
基因组学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2015
·Vol. 28
·期 1
·161-168
·
IF 2.138
Meichuan Liu,Jing Yu,Xue Ding,Guohua Zhao
In this work, a visible-light driven photoelectrochemical (PEC) aptasensor with high sensitivity and selectivity for cyanobacterial toxin Microcystin-LR (MC-LR) has been developed. MC-LR aptamers, serving as the specific recognition element, were conveniently immobilized onto vertically-aligned titanium dioxide nanotubes (TiO 2 NTs) photoanode substrate with the aid of graphene via π–π stacking interactions between the graphene hexagonal cells and the nucleobases of the DNA. The functionalization of graphene further endowed the constructed aptasensor visible-light response activity. The aptasensor was used for the label-free analysis of MC-LR by monitoring the increase in photocurrent that resulted from the binding of MC-LR and its aptamers. Results showed that the photocurrent increment had a linear relationship with logarithm of MC-LR concentration in the range from 1.0 to 500 fM and the limit of detection reached as low as 0.5 fM. Furthermore, the aptasensor exhibited high selectivity while used to detect 100-fold concentration other several potential coexisting interferents. A promising PEC aptasensing platform for highly sensitive and selective monitoring of MC-LR has thus been established.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yaqiao Liu,Shuozhen Hu,Zhaoqun Gao,Xinsheng Zhang,Shigang Sun
Photoelectrochemical (PEC) water oxidation is considered to be a promising approach to converting solar energy into clean chemical fuels. α-Fe2O3 is a potential photoanode material for water oxidation with a high theoretical photocurrent density (12.6 mA cm–2) driven by visible light. Constructing α-Fe2O3-based heterojunction with other semiconductors is a promising strategy to improve the actual photoelectrocatalytic activity. In this work, nitrogen-doped Ta2O5 is introduced to synthesize N-Ta2O5-h@α-Fe2O3 nanorod heterojunction with different band structures. At the interface, electrons transfer from N-Ta2O5-h to α-Fe2O3, which forms a built-in electric field. The heterojunction structure contributes to inhibiting the severe recombination of photogenerated electron–hole pairs. By controlling the duration of mild heat treatment, the N-Ta2O5-h nanorods with different Fermi energy levels and contents of oxygen vacancies are obtained. A mild heat treatment in N2 is proved to enlarge the ΔE by leveling up the Fermi level and to promote the content of oxygen vacancies for the N-Ta2O5-h@α-Fe2O3 heterojunction as the heat-treatment time increases. The PEC water oxidation performance of the N-Ta2O5-h@α-Fe2O3 heterojunction increases when the mild-heat-treatment time is 2 h and decreases for 6 h treatment. Eventually, N-Ta2O5-2@α-Fe2O3 exhibits an enhanced photocurrent density of 3.10 mA cm–2 (4.4 times higher than that of bare α-Fe2O3), an efficiently boosted charge separation (2.0 times higher than bare α-Fe2O3), and a high chemical stability after a long-term test.
研究领域:
光电化学
·
材料科学
·
能量转换
·
催化
✓ 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）