ACS Applied Nano Materials
·
2026
·Vol. 9
·期 33
·16075-16088
·
IF 5.8
Xia Junkun,He Zhongyi,Lei Juanhong,Long Qiyang,Xiong Liping,Li Lili,Liu Feng,Ouyang Laizhao,Zeng Xiangqiong
Carbon dots are attractive lubricant nanoadditives because
their
nanoscale size and tunable surface chemistry allow them to interact
with confined friction interfaces. However, achieving effective antiwear
protection under high contact loads requires surface structures that
can couple physical filling with interfacial film formation. Here,
N, S, and P-modified carbon dots (NSP-CDs) were prepared from glucose-derived
carbon using taurine and phytic acid as heteroatom sources. The resulting
NSP-CDs had an average size of about 2.5 nm and exhibited abundant
oxygen-, nitrogen-, sulfur-, and phosphorus-containing functional
groups. When used as nanoadditives, 0.3 wt % NSP-CDs markedly improved
the antiwear performance of steel-to-steel contacts. At 392 N and
1400 rpm, the average wear scar diameter decreased by 47.5% compared
with the base oil, while the wear volume and apparent wear rate both
decreased by about 92.4%. Wear scar morphology, elemental mapping,
and X-ray photoelectron spectroscopy showed that NSP-CDs formed a
composite protective film containing a carbonaceous adsorption layer,
iron oxides/hydroxides, P–O/Fe–O–P-related phosphates,
and oxidized sulfur species. The antiwear effect is attributed to
the combined action of nanoparticle filling, rolling-polishing, and
N, S, and P-assisted interfacial film formation. These results suggest
that multielement surface modification is an effective strategy for
designing carbon dot nanoadditives for high-load antiwear lubrication.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2026
·
IF 3.4
Jingyi Zhang,Jiaming Wu,Yuren Zhao,Keyan Li,Xinwen Guo
Photocatalytic conversion of CO2 and H2O into syngas offers a green and sustainable pathway for the production of chemical feedstocks. However, most high-yield syngas production systems rely on a noble metal photosensitizer or cocatalyst, making it challenging to obtain cost-effective syngas. In this work, we designed and prepared S-scheme TiO2/CN heterojunctions with varying mass ratios by calcining the mixture of NH2-MIL-125(Ti) and pristine carbon nitride (CN). The combination of TiO2 with CN significantly enhances visible light absorption, and the formation of an S-scheme heterojunction effectively improves the separation and migration of photogenerated carriers. In addition, the enlarged specific surface area as well as the enhanced CO2 adsorption capacity also promote the photocatalytic CO2 reduction. Without any noble metal photosensitizer or cocatalyst, the 150TiO2/CN heterojunction demonstrated excellent performance to produce syngas. The production rates of CO and H2 are 6.2 and 1.9 mmol g–1 h–1, respectively, and the syngas production rate was 3.4 and 29.5 times that of pure CN and TiO2, respectively, when high-purity CO2 is used as the feed gas and the ratio of H2O/MeCN in solvent is 1:4. By adjustment of the composition of feed gas and solvent, high yield syngas with widely tunable CO/H2 ratios from 3.3:1 to 1:3.7 was achieved, and the maximum syngas production rate reached 12.1 mmol g–1 h–1. This work provides insights into the design of highly efficient photocatalysts for CO2 conversion to fuels or chemicals.
✓ 已验证
DOI
高影响因子
Advanced Science
·
2026
·
IF 14.1
Tinghong Xu,Yong Liu,Wenjing Zhang,Qiuruo Jiang,Yi Jin,Liangzheng Lin,Lumeng Wang,Zhanhao Gu,Mimi Lin,Shihao Chen
Iontophoresis-assisted corneal cross-linking (I-CXL) is an emerging transepithelial technique for treating keratoconus. I-CXL employs a small electric current to enhance the corneal penetration of riboflavin 5′-phosphate sodium (RF), avoiding the de-epithelialization side effects associated with conventional CXL (C-CXL). However, I-CXL is less effective than C-CXL due to insufficient RF surface charge hindering iontophoresis response and absorption efficiency, as well as inadequate reactive oxygen species (ROS) generation in the corneal stroma. This work reports the development of an innovative composite photosensitizer (NS-CQDs-RF), utilizing N, S co-doped carbon quantum dots (NS-CQDs) as nanocarriers, to overcome the bottlenecks facing I-CXL. Experimental results show that the as-synthesized NS-CQDs-RF composites exhibit a remarkable electric field response, enhanced RF corneal permeability, high ROS production efficiency, and excellent biocompatibility. Notably, I-CXL incorporating NS-CQDs-RF significantly improves corneal biomechanical stability, outperforming C-CXL while reducing total UVA irradiation energy without compromising efficacy. Density Functional Theory (DFT) calculations reveal that the optimized electronic structure and favorable energetics between NS-CQDs and RF drive efficient charge transfer, amplifying ROS generation. These findings highlight the superiority of the NS-CQDs-RF composite photosensitizers in I-CXL, offering a novel strategy for future keratoconus treatment.
✓ 已验证
DOI
PubMed
高影响因子
POLYMER
·
2026
·
IF 5.1
Zhichao Yang,Lishuai Zong,Wenhai Hu,Jinyan Wang,Xigao Jian
As communication frequencies extend into the millimeter-wave and even terahertz ranges, signal transmission delay and energy dissipation become increasingly critical, imposing higher demands on the dielectric properties of polymer dielectrics. Consequently, materials combining low dielectric constant (D k ) and low dielectric loss (D f ) are urgently needed for high-frequency applications. Herein, aiming to further reduce the dielectric constant of the π-π stacking poly(aryl ether) system while preserving its thermal performance, we propose a "moderate molecular-hinge" modulation strategy and design two quinoxaline-based bis-halogenated monomers with distinct bond angles: M1 (120°) and M2 (60°, containing trifluoromethyl groups).Incorporating these monomers at a 16 mol% ratio yields the tetra-polymers PBEQ-M1 and PBEQ-M2, respectively. The introduction of rigid twisted units into the polymer backbone effectively increases free volume while suppressing dipole relaxation through conformational locking, achieving synergistic optimization of dielectric and thermomechanical properties. Dielectric property measurements reveal a significant improvement in the dielectric performance of the materials upon the introduction of the twisted monomers. At 15 GHz, PBEQ-M2 exhibits a D k of 2.291 and a D f of 0.00321—an order of magnitude lower than that of commercial poly(ether ether ketone) (PEEK) in the GHz range. Critically, this polymer also retains a balanced set of properties: a glass transition temperature of 314°C, a 5% thermal decomposition temperature of 577°C, a tensile strength of 80 MPa, a water absorption of 0.47%, and a coefficient of thermal expansion of 68 ppm/K. Among intrinsic poly(aryl ether)s with a glass transition temperature above 310°C, PBEQ-M2 exhibits the lowest reported dielectric constant and loss. Structural analysis reveals the distinct impacts of the two twisted configurations. While the 120° "flexible kink" of M1 increases free volume and lowers D k , its excessive disruption of chain rigidity leads to a significant decline in thermomechanical properties. In contrast, the 60° "rigid kink" of M2, synergized with trifluoromethyl groups, not only creates substantial free volume but also maintains local chain rigidity through its inherently stiff backbone. Furthermore, the low polarizability of the trifluoromethyl groups contributes to D k reduction, successfully achieving a balance between dielectric and thermomechanical performance. This study demonstrates that, building on a robust π-π stacking network, the introduction of a rigid twisted structure via molecular-hinge engineering effectively reduces the dielectric constant while preserving thermal performance, offering a viable paradigm for high-frequency dielectric materials.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 22
·15926-15939
·
IF 4.4
Feng Yu,Sun Jun,Xu Ruonan,Zhang Wenchao,Liu Baicen,Yue Dong,Yao Yuanhang
The advancement of dielectric capacitors toward achieving high-energy storage density requires polymer-based dielectric materials with both high breakdown strength ( E b ) and high dielectric constant ( ε r ). However, the inherent trade-off between E b and ε r limits further enhancement of energy storage density. In this study, a design approach involving inorganic fillers with gradient dielectric matching is proposed for a double core–shell structure. Barium calcium zirconate titanate (BZCT) nanofibers are utilized as fillers within a double core–shell structure (BT + SiO 2 ), embedded into a polyetherimide (PEI) matrix through electrostatic spinning with an oriented arrangement. This results in the fabrication of BZCT nanofibers PEI-based composite dielectrics with parallel double core–shell structure, demonstrating exceptional energy storage performance. Specifically, the composite dielectric (0.5%-10% BZCT@BT@S/PEI) achieves a charge/discharge efficiency ( η ) of 93.29% and a discharge energy density ( U e ) of 6.97 J/cm 3 with BT and BZCT contents of 0.5% and 10%, respectively. The results show that BZCT enhances the ε r of the composite dielectric, while the double core–shell structure of BT + SiO₂ leads to a gradient change in ε r . This strategy not only can reduce the electric field( E ) distortion caused by the dielectric mismatch between the PEI matrix and BZCT, but also the double core–shell structure shows a relatively significant synergistic effect, successfully increasing the E b of the composite dielectric, with simulation results supporting the design rationale behind the double core–shell structure. This investigation introduces an insight for designing energy storage composite dielectrics. Graphical abstract The alternative text for this image may have been generated using AI.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Gujie Yao,Xilai Wang,Yanyan Feng,Xiaoqing Wang,Da Jin,Xue you Wen,Zhixiang Fu,Tianxiang Guo
A promising dual-coping Ag,S-Cu x O/Cu foam electrocatalyst was synthesized for CO 2 RR. • The synergistic effect of Ag and S for CO 2 RR toward HCOOH and CH 3 OH was elucidated. • The Ag-S synergistic mechanism governing HCOOH and CH 3 OH formation was revealed. The electrochemical reduction of CO 2 into value-added fuels such as formic acid and methanol presents a promising approach to mitigating climate change, yet it is constrained by the rational design of efficient electrocatalysts and the understanding of structure-efficiency relationships. Here, a highly efficient Ag,S-Cu x O/Cu catalyst was developed via a facile in situ dual-doping strategy, incorporating Ag and S onto pre-oxidized copper foam. Comprehensive multimodal characterization (SEM, EDS, XRD, XPS, AES) and electrochemical measurements (LSV, EIS, GC, 1 H NMR) were conducted to elucidate the catalyst’s structural properties and CO 2 reduction performance. Results indicate that Ag/S dual doping synergistically enhances catalytic activity by reducing solution mass transfer resistance through improved catalyst nanostructures and expanding the electrochemical active surface area (ECSA). Ag incorporation effectively suppresses the competitive hydrogen evolution reaction (HER), while S incorporation lowers charge transfer resistance ( R ct ). Compared with the Cu x O/Cu foam catalyst, the Ag,S-Cu x O/Cu foam catalyst exhibits increased partial current densities for formic acid (HCOOH) and methanol (CH 3 OH) by 17.09 and 5.70 mA·cm −2 , respectively. Furthermore, the reaction pathways for the electrochemical conversion of CO 2 to HCOOH and CH 3 OH are systematically elucidated. This study proposes a dual-doping strategy to achieve sustainable CO 2 electroreduction and delivers fundamental insights into the external parameters that govern the selective formation of high-value products. Download: Download high-res image (142KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Balamurali Ravichandran,Naresh Narayanan,Narayanamoorthy Bhuvanendran,Huiyuan Liu,Weiqi Zhang,Huaneng Su
PtCo nanoparticles anchored on P,S,N-doped porous carbon nitride enables strong ORR activity. • Hierarchical porosity and heteroatom doping enhance Pt dispersion and mass transport. • PtCo/P,S-HPCN shows 2.37 mA cm ⁻2 Pt ⁻1 activity and superior ORR durability. • Outperforms commercial Pt/C in both RDE and single-cell PEMFC performance tests. • Robust carbon nitride support resists corrosion in acidic, high-potential environments. Maximize the Pt utilization with high durability and efficient mass transport is crucial on the electrocatalyst design for the practical low-temperature fuel cell applications. In this work, we designed an ultrafine PtCo alloy nanoparticles distributed uniformly on phosphorus and sulfur co-doped hierarchical porous carbon nitride (PtCo/P,S-HPCN), synthesized via hydrothermal treatment, pyrolysis, and chemical reduction. The heteroatom-doped carbon nitride framework exhibits superior chemical stability compared to conventional carbon materials, while its hierarchical porous structure facilitates uniform dispersion of ultrafine PtCo nanoparticles (∼1.8 nm) and accelerates reactant transport. Synergistic effects from graphitic/pyridinic nitrogen species, P/S doping, and Pt–Co alloying modulate the electronic structure of Pt, optimizing *OOH binding and enhancing ORR kinetics. The optimized catalyst delivers excellent performance in acidic media, achieving a high half-wave potential (0.88 V vs. RHE), a mass activity of 0.91 mA µgPt⁻ 1 , and a specific activity of 2.37 mA cmPt⁻ 2 at 0.85 V. Remarkably, it retains 73% of its initial mass activity and loses only 11 mV in half-wave potential after 5000 durability cycles. In practical PEMFC tests, the PtCo/P,S-HPCN cathode achieves a peak power density of 0.42 W cm⁻², surpassing commercial 40 wt% Pt/C. This study demonstrates a promising strategy for designing durable, low-Pt and high activity catalysts for PEMFC applications. Download: Download high-res image (217KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Kang Zhong,Shuting Li,Jinman Yang,Chentao Zhu,Quan Zhang,Yanhua Song,Peipei Sun,Xingwang Zhu,Huaming Li,Hui Xu
Photocatalytic CO 2 reduction to high-value chemicals is an effective route to address energy and environmental issues. However, it remains challenging to develop semiconductor photocatalysts with high activity and efficient charge separation. Herein, a novel hm-C 4 N 3 /TiO 2 S-scheme heterojunction was synthesized, and its interfacial charge transfer mechanism was revealed by in-situ XPS, KPFM and the density functional theory calculations. The construction of the S-scheme heterojunction establishes a strong internal electric field (IEF), which significantly accelerates the separation and directional migration of photogenerated carriers and boosts the reaction kinetics. The optimized photocatalyst delivers a CO production rate of 15.20 μmol g −1 h −1 , about 5 times that of pure TiO 2 . Gibbs free energy calculations confirm that the heterojunction reduces the reaction energy barrier and provides a thermodynamic advantage for CO 2 to CO conversion. This study offers a feasible strategy for designing half-metallic carbon nitride-based S-scheme heterojunctions toward efficient photocatalytic CO 2 reduction.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chen Huang,Dongchao Qiu,Xiang Li,Lixia Wu,Fanglian Huang,Zhangyan Ye,Youyun Zeng
Enzyme-mediated bacterial active endocytosis enhanced the permeability of NG/NO to biofilms. • The chemical structures of Schiff base and NONOates provided dual proton-responsive of gas release. • NO induces S-nitrosylation of PDEs in S. mutans 。, thereby reducing lactate production. Dental caries in permanent teeth have remained one of the most prevalent oral diseases over the past three decades, with their global incidence exhibiting a steady upward trajectory. Streptococcus mutans ( S. mutans ) colonization on dental surfaces, coupled with its acidogenic metabolic activity, constitutes a primary etiological factor in caries pathogenesis. In this work, a NO-loaded polysaccharide nanogel, NG/NO was developed to address this issue. Dextran component of the NG/NO demonstrated selective targeting capabilities, promoting active internalization by S. mutans through enzyme-mediated endocytosis. This mechanism significantly enhanced biofilm penetration of the NG/NO (>70% biofilm penetration depth) within a 4-h exposure. The Schiff base bonds and N-diazeniumdiolates conferred the dual-acid-responsive NO release kinetics, achieving mM concentration of NO liberation within several minutes under cariogenic conditions (pH 4.5–5.5), thereby triggering rapid biofilm disrupting (>80% biomass reduction). Moreover, lower concentration of NO was shown to inhibit glycolysis and synthesis of lactic acid in S. mutans , thus improving acidic environment and demonstrating the potential to prevent enamel demineralization and dental caries. In conclusion, the NG/NO has promising applications in daily oral hygiene maintenance and caries prevention.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Abdul Shiferaw Qadir,Kejian Wang,Agasthiyaraj Lakshmanan,Raza Ullah,Mohamedazeem M. Mohideen,Alamgir Alamgir,Abdurohman Mengesha Mengesha Yessuf,Yong Liu
The development of efficient and cost-effective electrocatalysts is critical for advancing durable water-splitting systems. Special attention must be given to catalyst design, functionality, and interface regulation strategy to create synergistic effects that enhance electrocatalytic performance. We present a rational design of non-precious optimized heterojunction electrocatalysts comprising face-centered cubic nickel metal, cubic Ni₃S₄, and hexagonal NiS phases, supported on a 3D cross-linked carbon nanofiber (CNF) network. Detailed characterization reveals lattice-matching heterojunctions between Ni₃S₄, NiS, and Ni, where strong C-S bonding stabilizes the heterojunction and ensures effective electronic coupling. These heterogeneous interfaces serve as highly electroactive regions, significantly enhancing charge transfer, structural stability, and reaction kinetics. The optimized Ni₃S₄/NiS/Ni@CNF composite demonstrates exceptional bifunctional performance, achieving a low hydrogen evolution reaction overpotential of 88 mV at 10 mA/cm² with a Tafel slope of 34 mV/dec and an oxygen evolution reaction overpotential of 330 mV at 10 mA/cm² with a Tafel slope of 45 mV/dec, alongside excellent durability. The superior electrocatalytic performance is attributed to synergistic interactions at the Ni₃S₄, NiS, Ni, and CNF heterointerfaces, enhanced electronic conductivity, increased catalytic site exposure, and efficient interfacial charge transfer. This work offers a new strategy for the rational design of heterojunction-based materials with superior electrochemical performance in water-splitting applications.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Shuo Qiu,Yundi Wu,Ruocan Liu,Huanran Qu,Shiyang Shao,Jianqiang Chen,Xilong Wu
Reactive oxygen species (ROS)-based therapies are promising for tumor ablation, but their efficacy is limited by hypoxic microenvironments and poor intratumoral penetration. This study presents a photo/sono/magneto-responsive ternary heteronanocrystal, BPNS/PCN-224/Fe 3 O 4 @PVP (BPF), incorporating an S-scheme heterojunction and Fe-based nanozyme catalysis. The S-scheme heterojunction between piezoelectric black phosphorus nanosheets (BPNS) and photosensitizing PCN-224 enhances ROS generation for synergistic photodynamic therapy (PDT) and ultrasound-piezocatalytic therapy (UPCT). Superparamagnetic Fe 3 O 4 nanoparticles provide peroxidase- and catalase-like activities, further increasing oxidative stress and reinforcing PDT, UPCT, and chemodynamic therapy. This robust ROS production induces immunogenic cell death, activates immune memory, and elicits systemic antitumor responses. Under ultrasound and magnetic driving, BPF is enriched and actively transported into deep tumor regions, improving intratumoral distribution. The integrated platform achieves efficient ROS-amplified tumor cell killing, along with near-infrared fluorescence and T 2 -weighted MRI for real-time treatment guidance. This multifunctional S-scheme heteronanocrystal offers a promising strategy for penetrative, ROS-amplified tumor ablation, and enhancing systemic antitumor immune responses.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Sun Ruize,Liu Xiaonan,Chen Jingge,Chen Zhangguo,Zhou Jicheng,Xu Wentao
Propane direct dehydrogenation (PDH) is an important way for the high-value utilization of propane (C 3 H 8 ). However, the conventional thermal catalytic reaction process is limited by the thermodynamic equilibrium of the strong endothermic reaction, and usually needs to be operated at high temperature, which makes it difficult to balance high conversion and high selectivity. In this study, a new method of microwave catalytic dehydrogenation of C 3 H 8 to propylene (C 3 H 6 ) at low temperature and high efficiency was proposed, and Pt-ZnO/S-1 + SiC microwave catalyst was developed. It was found that microwave significantly improved the conversion and selectivity of the catalyst, and the reaction was carried out efficiently at lower temperatures. Under low temperature microwave catalysis (MCRM) at 450 ° C, the conversion of C 3 H 8 was as high as 46.4%, and the selectivity of C 3 H 6 was as high as 99.3%, which were significantly better than 18.4% conversion and 95.1% selectivity under conventional thermal catalysis (CRM). Further study shows that the microwave action reduces the apparent activation energy of the catalyst from 75.5 kJ·mol −1 under CRM to 48.7 kJ·mol −1 under MCRM. This study provides a new strategy for the low-temperature and efficient conversion of low-carbon alkanes such as C 3 H 8 and provides a new idea for the application of microwave catalytic technology in other catalytic reactions.
✓ 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）