ADVANCED MATERIALS
·
2025
·
IF 26.8
Dong Li,Bing-Xuan Zhu,Wen He,Pei-Yu Huang,Qian Zhang,Wen-Bo Duan,Liang Zhen,Yang Li,Jing-Kai Qin,Cheng-Yan Xu
Lamed by the Shockley–Queisser limit, complex device architectures and material selection, traditional photovoltaic (PV) technologies based on heterojunctions are difficult to implement reconfigurable PV generation with high power efficiency. Here, the universal bulk ionicphotovoltaic (BIPV) effect in 2D quaternary metal thio(seleno)phosphates (QMTPs) crystals is reported, and demonstrates the giant photocurrent generation with excellent reconfigurability. The programmable ion migration driven by an electric field not only leads to the in-plane electric potential gradient, but also contributes to the reversible modulation of crystal inversion asymmetry. The formation of reconfigurable in-plane homojunction in 2D CuBiP 2 Se 6 channel results into the pronounced conductance rectification with a high ratio exceeding 10 3 , contributing to an extremely large short-circuit PV current density of 1.6 A cm −2 under 532 nm illumination, among the highest values of state-of-the-art 2D PV devices. More importantly, the electric potential gradient and degree of centrosymmetric of 2D QMTPs channel can be precisely controlled by the direction and magnitude of programming voltage pulses, which enables the linearly programmed BIPV current generation with an ideal nonlinearity factor of 0.09. The photoelectric conversion relying on the BIPV effect breaks the integration bottleneck of reconfigurability and power efficiency, providing a transformative strategy for developing next-generation PV devices.
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高影响因子
ELECTROANALYSIS
·
2025
·Vol. 37
·期 3
·e12037
·
IF 2.3
Jiajia Wang,Chun Kan,Mengping Gao,Baokang Jin
In this paper, a water-soluble highly electrochemical signal cadmium telluride (CdTe)/cadmium selenide (CdSe)/polyaniline nanocomposite was developed through a fast and convenient method, and then the nanocomposite-modified glassy carbon electrode was prepared for the determination of alpha-fetoprotein (AFP). This aptasensor was constructed by covalently immobilizing NH 2 -functionalized AFP-specific aptamer on nanocomposite with plenty of carboxylic groups. This electrochemical biosensor via the layer-by-layer method could evidently increase the steric hindrance of the sensing electrode and effectively depress the electron transfer, leading to obviously decreased current intensity. The ultrahigh sensitivity of this immunoassay is derived from the two primary reasons as follows. First, the CdTe/CdSe multiple-sensitized and cosensitized structure could maximize speed of charge transfer processes between electrodes and the electroactive species, dramatically promote electron transfer, and effectively inhibit the electron–hole recombination, resulting in the significantly enhanced electrochemical current intensity of the sensing electrode. Second, the electrocatalytic oxidation of K 3 Fe(CN) 6 , which makes the CdTe/CdSe change from a lower-energy to higher-energy states (CdTe/CdSe QDs)*, reduces the activation energy of the reaction and the (CdTe/CdSe QDs)* more likely to oxidize, accelerating the transfer of electrons. Scanning electron microscope, transmission electron microscope, and X-ray photoelectron spectroscopy were used to characterize the material. Electrochemical impedance spectroscopy was used to observe the loading process of the material. Differential pulse voltammetry was used as a method of measurement. The immunosensor exhibited a wide linear range from 1.0 to 10.0 μg/mL for target AFP detection, with a low detection limit of 1.0 pg/mL (S/N = 3). To evaluate the analytical reliability, reproducibility, specificity, and stability, the proposed immunosensor was applied to human AFP-spiked serum samples, and acceptable results were obtained, indicating that the method can be readily extended to other bioaffinity assays of clinical or environmental significance.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jing Xu,Kangle Wan,Jianjie Wu,Yunchao Wu,Wei Yan,Lichuan Zhang,Yuanping Chen,Yingcong Wei
During the piezoelectric photocatalytic process, the surface curvature of the piezoelectric photocatalyst undergoes dynamic changes under the influence of external mechanical forces. However, the correlation between the surface curvature and catalytic performance remains largely unexplored. Here, we demonstrate that decreasing the radius of curvature of MoSe2 significantly enhances its piezoelectric-photocatalytic activity for C–N coupling reactions, enabling imine synthesis from benzylamine. Comprehensive characterization and DFT calculations together show that the piezoelectric effect in the curved MoSe2 structure inhibits photogenerated charge carriers from recombination, improving carrier utilization efficiency. Additionally, the surface curvature effect induced by ultrasonic driving reduces the band gap. It promotes the effective transfer of electrons from Mo atoms in MoSe2 to −NH2 in benzylamine, thereby facilitating the activation of the benzylamine molecule. As a result, the synergistic effects of the piezoelectric and curvature characteristics significantly enhance the photocatalytic performance of MoSe2 toward the C–N coupling of benzylamine. This study not only provides new insights into interfacial reaction mechanisms in piezoelectric photocatalysis but also offers a novel perspective for designing high-performance catalytic systems.
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高影响因子
Advanced Energy Materials
·
2024
·Vol. 14
·期 9
·2302532
·
IF 24.4
Pan Luo,Honglei Wang,Xue Wen,Xianzhu Luo,Peng Xu
The electrocatalytic preparation of hydrogen at different pH values not only achieves excellent device performance but also promotes the application of reactive oxygen species (ROS) clearance and hydrogen anti-inflammation. However, it is difficult to develop materials that simultaneously achieve these excellent properties. Herein, the preparation of beaded necklace-like Co 9 Se 8 microspheres using a general and facile synthetic strategy is reported. The Co 9 Se 8 -modified electrode has three applications: efficient water splitting for enhanced performance, ROS scavenging, and hydrogen anti-inflammatory activity. Experiments, high-angle-annular-dark-field scanning transmission electron microscopy, and density functional theory calculations indicate that the reconstructed Co(OH) 2 plays a vital role in the oxygen evolution reaction and that the transition from *O to *OOH is the actual rate-determining step. The Co 9 Se 8 material, with its unique beaded necklace-like structure, exhibits exceptional hydrogen production capabilities in phosphate buffer solution (pH 7.4). In particular, hydrogen produce under neutral conditions can effectively reduce ROS levels and significantly inhibit inflammation-related pathological processes, playing a unique antioxidant and anti-inflammatory role at the cellular level. The obtained results indicate that the as-synthesized Co 9 Se 8 is more suitable for water splitting, ROS scavenging, and hydrogen anti-inflammatory applications, outperforming other transition metal electrodes and rendering practical industrial and clinical applications.
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TALANTA
·
2024
·
IF 5.6
Huimin Yang,Yazhou Yang,Chaofan Ma,Qirui Wu,Jiahong Tang,Chaoqi Zhu,Xiaoxia Wang,Dawen Zeng
NO 2 is a hazardous gas extremely harmful to the ecosystem and human health, so effective detection of NO 2 is critical. SnSe 2 is a promising candidate for gas sensors owing to its unique layered configuration that facilitates the diffusion of gas molecules. Here, ultrathin self–assembled nanoflowers F–SnSe 2 rich in defects were synthesized by a simple solvothermal method. It exhibits excellent gas sensing performances for NO 2 at room temperature (25 °C), with a high gas sensing response of 8.6 for 1 ppm NO 2 and a lower detection limit as low as 200 ppb, capable of sensitively detecting ppb–level NO 2 . DFT calculations revealed that the presence of Se vacancies assists the central Sn atoms to break through the shielding effect of the surface Se atoms and become exposed active sites. The higher reactivity leads to more charge transfer and higher adsorption energy , which strongly promoted the adsorption of NO 2 . This work verifies the important role of vacancies for the exposed active sites and provides new guidance for defect engineering to modulate the gas sensing performances of SnSe 2 .
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Qiyi Gan,Huakang Yang,Zining Zhang,Jun Liu,Yudong Guo,Dongxiang Luo,Xiao Liu
In lignin valorization systems, CdSe@CdS nanorods exhibit exceptional photocatalytic performance, where precise control over the rates of oxidation and reduction reactions is crucial. This study introduces a ligand modulation strategy that involves the incorporation of mercaptopropionic acid (MPA) and hexafluorophosphate (PF₆⁻) onto the surface of the nanorods to achieve a balanced redox reaction profile. The inorganic PF₆⁻ ligand primarily promotes reduction reactions, whereas MPA enhances hole transfer. By optimizing the distribution ratio of these ligands, the study achieved a significant enhancement in photocatalytic efficiency, resulting in a 94 % conversion rate for 2-phenoxy-1-phenylethanol (PP-ol) and yields of 67 % and 66 % for phenol and acetophenone, respectively. The distinct roles of MPA and PF₆⁻ can be attributed to their respective spatial site resistances, electrostatic interactions, and surface passivation characteristics. MPA, with its larger spatial resistance, stabilizes and extends hole lifetimes, thereby enhancing hole transfer efficiency. In contrast, PF₆⁻ exhibits lower spatial resistance and stronger electrostatic effects, which facilitate accelerated electron transfer. Furthermore, the ligands optimize the transport pathways for both electrons and holes on the nanorod surface through passivation. This ligand design strategy provides valuable insights for the development of efficient nanorod photocatalysts aimed at biomass valorization.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Hongyan Zhang,Xuehan Yang,Hua Wang,Yikai Wang,Ranran Li,Heye Fu,Hao Zhou,Dan Wu,Pan Yuang,Maoshuai He,Wenxian Wei,Tao Yang
Hydrogen has long been widely recognized as a promising carbon-free fuel with potential to tackle energy and environmental challenges owing to its high energy density and cleanliness. Water electrolysis offers an environmentally friendly method for hydrogen production from water and largely depends on the efficiency of electrocatalysts. Molybdenum diselenide (MoSe 2 ) has been regarded as one of the most promising earth-abundant and cost-effective catalysts for hydrogen evolution reaction (HER). Nevertheless, its catalytic activity has thus far remained below expectations. In this research, we introduce a vanadium-modulated Ni-MoSe 2 catalyst (NiV-MoSe 2 ), demonstrating outstanding catalytic performance towards HER with an overpotential of 74.5 mV at 10 mA cm −2 and a Tafel slope of 56.2 mV dec −1 . The enhancement of catalytic performance is highly likely attributed to the dual doping of vanadium and nickel. As a result, the intrinsic activity, electrochemical active surface area, and conductivity are significantly improved. These findings enable the NiV-MoSe 2 catalyst to be an exceptionally competitive alternative to noble metal-based catalysts, and may stimulate further studies in designing efficient HER catalysts through multi-heteroatom substitution.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zhiyuan Tian,Yanhui Song,Manyuan Gan,Yongqing Shen,Pengfei Zhang,Peizhi Liu,Chuang Liu,Bingshe Xu,Junjie Guo
Exploring low-cost and high-efficient electrocatalysts to accelerate the sluggish kinetics of the hydrogen evolution reaction (HER) has attracted increasing research interest. The incorporation of nonmetallic elements (such as P, S, Se) into double hydroxides exhibits great potential to achieve high activity, increased stability, and reduced cost. In this study, a series of vanadium-doped cobalt–nickel sulfide/phosphide/selenide (CoNiV-X, X = P, S, Se) electrocatalysts were synthesized via a hydrothermal method and low-temperature phosphating, vulcanization, or selenization processes. These self-supported catalysts exhibited excellent HER performances and remarkable stability over a period of 96 h in the alkaline media (1.0 M KOH). Specifically, the optimized CoNiV-P electrocatalyst demonstrated a low overpotential (η 10 = 39 mV). The density functional theory studies revealed the crucial role of Co sites in the electron transfer process, contributing to the excellent performance of CoNiV-P electrocatalysts. This work proposes the electrocatalysts which may hold great potential for hydrogen production as a clean and sustainable alternative to polluting and finite fossil fuels.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jianhong Zhang,Junjie Yan,Zhikang Ao,Wei Li,Wei Wang,Yinong Lyu,Huifang Ma
The heterostructure moiré superlattice plays a crucial role in modulating electronic and optical properties through the formation of periodic potential patterns. However, the synthesis of ultrathin 2D heterostructures remains a significant challenge. In this work, ultrathin 2D CoSe/WSe 2 heterostructures were grown via a two-step vapor deposition route. The thickness of nonlayered hexagonal CoSe nanosheets was reduced to 1.7 nm through growth on a 0.79 nm thick WSe 2 nanosheet. Raman spectroscopy analyses indicate the formation of high-quality 2D CoSe/WSe 2 heterostructures. Selected area electron diffraction studies conclusively validate the high-quality single-crystal nature of CoSe and WSe 2 nanosheets within the resultant heterostructures. Scanning transmission electron microscopy studies show that the formed heterostructure exhibits a well-defined moiré superlattice with a periodicity of ∼ 3.96 nm. Additionally, the device based on CoSe/WSe 2 heterostructures with CoSe contacts demonstrates relatively higher on-state current and field-effect mobility compared to the WSe 2 device with Cr/Au contacts. The developed synthesis method for ultrathin CoSe/WSe 2 heterostructures provides a material platform for investigating their diverse properties.
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Advanced Energy Materials
·
2024
·
IF 24.4
Zhanxiang Yin,He Zhang,Yaqiang Wang,Yi Wu,Youbo Xing,Xue Wang,Xufei Fang,Yuan Yu,Xin Guo
Dislocations as line defects in crystalline solids play a crucial role in controlling the mechanical and functional properties of materials. Yet, for functional ceramic oxides, it is very difficult to introduce dense dislocations because of the strong chemical bonds. In this work, the introduction of high-density dislocations is demonstrated by ultrahigh-pressure sintering into a typical ceramic oxide, BiCuSeO, for thermoelectric applications. The ultrahigh-pressure induces shear stresses that surpass the critical strength for dislocation nucleation, followed by dislocation glide and profuse multiplication, leading to a high dislocation density of ≈9.1 × 10 16 m −2 in Bi 0.96 Pb 0.04 CuSeO ceramic. These dislocations greatly suppress the phonon transport to reduce the lattice thermal conductivity, reaching 0.13 Wm −1 K −1 at 767 K and resulting in a record-high zT of 1.69 in this oxide thermoelectric ceramic. This study demonstrates the feasibility of generating dense dislocations in ceramic oxides via ultrahigh-pressure sintering for tuning functional properties.
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Small Structures
·
2024
·
IF 13.9
Zhenliang Li,Yujian Rao,Zhehan Wang,Tuo Zhang,Guodong Wu,Litao Sun,Yuan Ren,Li Tao
Two-dimensional (2D) transition metal dichalcogenides (TMDs) are widely used in interfacial reactions and electronic devices due to their tunable bandgap and high efficiency of carrier transport. However, the lack of fully exposed active sites in bulk samples or stacked nanosheets leads to limited performances. In this work, a general method is developed to construct ordered mesoporous TMDs/metal oxides (OM-TMDs/MOs) heterostructures, including WS 2 /WO 3 , WSe 2 /WO 3 , WTe 2 /WO 3 , MoS 2 /MoO 3 , and V 3 S 4 /V 2 O 3 , through one-step thermal sulfurization (selenidation/tellurization) of self-assembled amphiphilic block copolymer/polyoxometalates clusters nanocomposites with ordered mesostructures. The OM-TMDs/MOs possess highly OM structures with high specific surface area, large pore size, and rich active edge sites in the frameworks of heterostructures. The chemiresistive gas sensor based on OM-WS 2 /WO 3 shows excellent NO 2 -sensing performances at room temperature, with high sensitivity, ultrahigh selectivity ( S NO 2 $S_{\left(\text{NO}\right)_{2}}$ / S gas > 20), and fast response speed (6 s). Theoretical study reveals that the strong adsorption capacity of WS 2 /WO 3 heterostructure and edge sites of WS 2 for NO 2 molecules and the high charge transfer between them contribute to high selectivity and sensitivity of the sensor. This universal method provides novel strategy for synthesis of OM TMDs-based nanomaterials, showing great potential in various applications such as electronic devices, catalysis, energy storage, and conversions.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuaihu Ma,Lin Zhu,Kang Liu,Cao Liu,Zhilou Liu,Jixiang Xu,Jishu Han,Hui Liu,Lei Wang,Shu Yang
Metal selenides have been demonstrated as promising Hg 0 adsorbents, while their poor high temperature activity impedes their application feasibility in non-ferrous smelting flue gas. Herein, highly well-dispersed CoSe 2 nanoparticles were immobilized on the inner of carbon layer via an in-situ carbon coating strategy, consequently demonstrating improved Hg 0 removal performance. Compared to CoSe 2 , CoSe 2 /NC exhibited remarkably higher mercury removal activity, which may be attributed to more active sites (Co 3+ , Se 2 2- ) exposed between carbon interfaces and CoSe 2 . More significantly, CoSe 2 /NC with a moderate carbonization temperature of 500℃ could maintain its stable Hg 0 removal activity at a wide operating temperature range (60–240 °C). The saturation adsorption capacity of CoSe 2 /NC-500 could achieve 510.48 mg·g −1 at 180 °C. The outstanding adsorption activity at elevated temperature is mainly attributed to the thermostability of active Se species immobilized in the carbon layer by both space constraint and chemical interaction, leading to the enhanced mercury diffusion migration energy barrier from 0.41 to 0.79 eV on CoSe 2 . The present study aims to take an important step toward the rational design of selenium-based adsorbents for mercury removal from nonferrous smelting flue gas through the excellent protective properties of carbon coating.
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