ACS Nano
·
2025
·
IF 16
Shujie Li,Houde Wu,Li Guo,Xiaoyi Wang,Gang Shu,Xinxing Li,Shao-Kai Sun
Achieving high resolution while minimizing contrast agent dosage remains a key goal, yet a major challenge in contrast-enhanced computed tomography (CT) imaging. Herein, we propose an artificial intelligence-assisted low-dose high atomic number contrast agent for ultrahigh-resolution CT imaging. As a proof of concept, high-quality PEGylated hafnium oxide nanoparticles (DA-HfO2 NPs) are synthesized, exhibiting superior X-ray attenuation, high hafnium content (36%), excellent water solubility, appropriate hydrodynamic size (13.5 nm), and prolonged circulation half-life (161.9 min). High-dose DA-HfO2 NPs enable extended ultrahigh-resolution vascular imaging with a spatial resolution of 0.15 mm and a time window of at least 60 min. More importantly, by integrating artificial intelligence, the low-dose contrast agent (at 25% of the standard dose) achieves imaging quality comparable to that of the high-dose agent in both contrast density and spatial resolution, while simultaneously enhancing biosafety. This strategy enables high-resolution imaging at reduced contrast agent doses and offers a promising approach for sensitive and safe CT angiography.
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CHEMICAL ENGINEERING COMMUNICATIONS
·
2025
·
IF 2
Fan Pan,Lijiang Tian,Fulong Chen,Jie Zhang
The photocatalytic efficiency of titanium dioxide(TiO2) is easy to restrict by rapid recombination of carriers, narrow spectrum response range, and low specific surface area. Constructing heterojunctions has been widely acknowledged as a viable strategy to enhance the photocatalytic performance of TiO2. Here, TiO2@MIL-101(Cr) heterojunction was synthesized via the in-situ method and applied to adsorbing and photocatalytic degrading of gaseous benzene. The findings demonstrate 40TM exhibited the best adsorption(1157.03 μgC6H6/(g·h)) and photocatalytic(817.80 μgC6H6/(g·h)) performance, which were 2.05 and 5.21 times of TiO2, respectively. The enhancement of adsorption performance probably resulted from the higher specific surface area(637.33 m2/g) and the micro-mesoporous structure. The excellent photocatalytic performance might stem from the extended wavelength response range(400–700 nm) and the Z-scheme heterojunction formation. The possible mechanism is that electrons in MIL-101(Cr) and holes in TiO2 could participate in redox reactions to generate radicals, with superoxide radicals(∙O2−) and hydroxyl radicals(∙OH) being identified as the primary active species for benzene degradation. Overall, this investigation offers a valuable reference for the application of heterojunction catalysts in the field of adsorption-photocatalytic degradation of volatile organic compounds (VOCs).
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Advanced Science
·
2025
·
IF 14.1
Runchao Dong,Hulin Wang,Jia Zhang,Hongxin Yin,Genqiang Liu,Bartosz Orwat,Beata Luszczynska,Weijun Li,Dongdong Zhang,Huan He,Zhentao Du,Shanliang Chen,Weiyou Yang
Manipulating the interfacial and surface carrier dynamics within nanostructured semiconductors is pivotal for advancing the electrical and optical performances of photoelectrochemical (PEC) photodetectors (PDs), particularly for durable underwater optical communication systems. Herein, a highly responsive and robust self-powered PEC UV PDs based on SiC/Au heterojunction nanoarrays is explored, by leveraging the synergistic effect from localized surface plasmon resonance (LSPR) of Au nanoparticles (NPs), heterojunction interfacial engineering, integrated self-supporting photoelectrode architecture, 1D nanoarray benefits, and inherent chemical stability of SiC. SiC nanowire (NW) arrays are fabricated via anodic oxidation and subsequently decorated with tailored densities of Au NPs using controlled sputtering. The as-assembled SiC-based PEC PDs demonstrate exceptional UV (375 nm) photodetection behaviors with rapid response ( τ r / τ d , 86.5/170.95 ms), high responsivity ( R λ , 1244.95 mA W −1 ), excellent detectivity ( D * , 6.35 × 10 11 Jones), and remarkable external quantum efficiency ( EQE , 412.45%). Moreover, they exhibit broad pH tolerance and excellent long-term stability against full aquatic environments. This work provides a strategic approach for designing high-performance self-powered PEC PDs for reliable underwater optical communication, such as liquid environmental monitoring, ocean exploration, and biomedical detection.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yuhang Bai,Yang Yang,Zelong Yao,Jinrui Li,Jia Liu,Peipei Wang,Huiling Du,Xing Zhao,Laifei Cheng
MAX phases can benefit from high-entropy (HE) effects to enhance their electromagnetic (EM) wave absorption properties. This study introduces Joule heating-driven ultrafast synthesis (JHUS) for the first time to synthesize the novel HE-MAX phase (Ti 1/5 Nb 1/5 Ta 1/5 Hf 1/5 V 1/5 ) 2 AlC at 1200°C in 20 s. The high-entropy effects, combined with the JHUS, lead to the formation of structural defects within the HE-MAX phase, such as lattice distortions, dislocations, and point defects. These structural defects play a crucial role in promoting dipole polarization. The high aspect ratio of the layered structure promotes electron transfer and interfacial polarization. These effects result in a significant improvement in EM wave absorption, with a minimum reflection loss of −46.07 dB at 2.7 mm and a 4.08 GHz absorption bandwidth at 1.5 mm. This study demonstrates an efficient and rapid method for synthesizing HE-MAX phases and explores the role of high-entropy engineering in optimizing their EM wave absorption.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Shuting Wei,Dan Yang,Renquan Guan,Peng Xu,Yuxin Wang,Yingmin Teng,Aicen Li,Junkai Zhang,Huaqiao Tan,Lili Wang,Zheng Lou,Wenjuan Zhang,Zhao Zhao
Hydrogen chloride (HCl) gas is widely generated in industrial processes and poses significant risks to human health and ecosystems. Therefore, highly efficient and sensitive sensors are essential for its detection. Among existing HCl gas sensors, chemiresistive sensors based on metal oxide semiconductors (MOSs) have gained considerable interest owing to their structural simplicity, low cost, and ease of miniaturization. However, these sensors often suffer from limitations such as slow response, low selectivity, and high operating temperatures. In this study, we successfully synthesized gas-sensing materials enriched with crystal defects and bulk strain through high-pressure torsion (HPT) technology. These modifications provide additional active sites for gas adsorption and reaction, and induce crystal field distortion that tunes the electronic structure, ultimately enhancing the HCl sensing performance. The optimal sample, ZnO-300R 3/2 , exhibited a response value of 213.79 % toward 100 ppm HCl gas, which is 14.6 times higher than that of the pristine ZnO. Combining spectroscopic analysis with density functional theory (DFT) calculations, we clarified the synergistic mechanism between electronic band structure modulation and surface lattice oxygen activation. This work provides valuable insights for designing novel room-temperature gas sensors and promotes a deeper understanding of surface lattice oxygen-mediated sensing mechanisms.
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JOURNAL OF CATALYSIS
·
2025
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IF 6.5
Wenli Zhang,Xu Han,Xianhong Zheng,Yi Yang,Zhiqi Zhao,Haiwei Yang,Yi Zhang,Chengbo Du,Zongqian Wang,Qingbo Xu,Changlong Li,Peng Wang
Solar-driven photocatalysis is inherently limited by its diurnal discontinuity. Herein, we report a V 2 O 5 /g-C 3 N 4 /Ti 3 C 2 triadic composite that transcends this limitation via a “micro proton-battery-like” mechanism, enabling round-the-clock catalytic activity. The optimized composite achieves 93.9 % tetracycline degradation under visible light and, remarkably, maintains 64.1 % efficiency in the dark. This is underpinned by an 8-fold higher electron storage capacity (0.16 μmol/mg) than pristine g-C 3 N 4 , achieved via reversible V 5+ /V 4+ redox transitions. DFT calculations corroborate charge localization in V 3d orbitals during the light-driven “charging” phase and subsequent Ti 3 C 2 -mediated electron release for ·O 2 − generation in the dark. This work establishes a groundbreaking paradigm that unifies photocatalysis with electrochemical energy storage for persistent environmental remediation.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-18
·
IF 2.4
Song Zhi,Han Dongxu,Liu Boxia,Jiao Hongqiao,Wang Lin,Liu Jialu,Zhang Xiayan,Huang Yeqiong,Xing Chuhan,Zhang Jing
Titanium dioxide (TiO 2 ) is widely regarded as one of the most promising semiconductor materials for photocatalysis. In this study, through defect engineering, the strong interaction between F − ions and surface Ti 4+ is utilized to induce the generation of oxygen defects, thereby achieving selective etching and exposure of the high-energy {101} crystal plane. At the same time, the coordination effect of Ni on the surface metal active site not only promotes the transition of the forbidden band energy level, but also effectively narrows the band gap of TiO 2 . Through systematic characterization, the successful coordination of Ni and the enhancement of the high-energy state crystal plane stability were confirmed. BET specific surface area test shows that the large specific surface area of Ni-TiO 2 samples provides more surface active sites for photocatalytic reactions. Photoelectric performance tests further show that the introduction of double defect engineering significantly improves the separation and migration efficiency of TiO 2 photogenerated carriers. Degradation experiments showed that Ni-coordinated TiO 2 could efficiently degrade phenol pollutants within 60 min, exhibiting excellent photocatalytic activity. Capture experiments further confirmed that the coupling between non-radical 1 O 2 and free radical •OH is the main active species in photocatalytic degradation. The synergistic effect of the generation of high-energy state facets and Ni coordination significantly improves the separation and migration of photogenerated carriers, thereby enhancing the photocatalytic performance. This work provides a reliable defect engineering strategy for improving the photocatalytic performance of TiO 2 . Graphical In this study, through defect engineering, the strong interaction between F − ions and surface Ti 4+ is used to induce the generation of oxygen defects, thereby achieving selective etching and exposure of high-energy {101} crystal planes. At the same time, the coordination effect of Ni on the surface metal active sites not only promotes the transition of the forbidden band energy level, but also effectively narrows the band gap of TiO 2 . By carefully designing the photocatalytic process, direct degradation of phenol was achieved under the coupling of non-radicals and free radicals. The improvement in photocatalytic activity is due to the increase in specific surface area, which not only broadens the light absorption capacity but also significantly improves the separation and migration of photogenerated carriers. The capture experiment further verified the efficient catalytic mechanism of the Ni-TiO 2 /phenol system, demonstrating that the synergistic effect of the high-energy {101} crystal plane and the highly active Ni coordination was fully utilized to promote the generation of •OH radicals during the reaction and effectively drive the conversion of oxygen molecules into 1 O 2 through vacancy oxidation. This study not only provides a useful reference for the design of high-efficiency and low-energy photocatalysis, but also provides a new solution for the removal of phenol pollution in coal chemical wastewater.
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Nature Communications
·
2026
·
IF 18.1
Liu Xiangyun,Chai Youzheng,Gu Yuwei,Li Yongqi,Wang Xiao,Wang Qiancheng,Zhang Gong,Liu Huijuan,Qu Jiuhui
High-salinity mine water generated during membrane concentration of mine water contains structurally stable complex organic matter that resists removal and mineralization by conventional advanced oxidation processes, ultimately producing low-value by-product salts that hinder the resource utilization pathway. Leveraging the ultraviolet sensitivity of inherent chromophore groups and conjugated structures, this study developed an ultraviolet-activated assisted electrochemical process. By harnessing ultraviolet/oxidant synergies, this approach achieves ~89.9% total organic carbon removal, with minimal performance decay over 1000 hours. Combined with ultraviolet-visible spectroscopy, fluorescence excitation-emission-matrix spectroscopy, fourier transform ion cyclotron resonance mass spectrometer, and model contaminant experiments, this study elucidates an ultraviolet activation and radical attack synergistic mechanism driving organic mineralization. The direct integration of purified brine with bipolar membrane electrodialysis successfully produces acid, high-purity alkali (>99%), and reusable water, thereby closing the loop of impurities removal and resource recovery. This integrated system offers a strong strategy for high-value resource recovery and sustainable mine water management.
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COMPOSITES COMMUNICATIONS
·
2026
·
IF 8.6
Jiang Guo,Xiuyun Ma,Shaohua Xi,Yong Mao,Yan Zhang,Yukun Sun,Wenling Wu,Jianfeng Zhu
Polymer composites with room temperature magnetoresistance (MR) are attractive for emerging magnetic sensors and information-storage devices in the era of the Internet of Things. In this work, the magnetorsistive polyaniline (PANI) functionalized magnetic Ti 3 C 2 T x Composites were prepared by solvothermal and in-situ polymerization method. By decorating non-magnetic Ti 3 C 2 T x with magnetic Fe 3 O 4 particles and tuning the Fe 3 O 4 loading on Ti 3 C 2 T x , the room temperature magnetoresistance can be effectively controlled. The Ti 3 C 2 T x /PANI (T/P) composites exhibit positive MR of 4.65% at 2 T, while the Fe 3 O 4 –Ti 3 C 2 T x /PANI (FT/P) composites demonstrates negative MR of -11.13% at 2 T with 60 wt% Fe 3 O 4 loading in Fe 3 O 4 –Ti 3 C 2 T x . Structural and morphological characterizations (SEM, TEM, XRD, FT-IR and XPS) confirm the successful fabrication of FT/P composites. The positive MR in T/P is well described by the wave-function shrinkage model, and the negative MR in FT/P composites is quantitatively fitted by the forward interference model. The localization length ( a 0 ), hopping distance (R hop ) and density of states at the Fermi level (N(E F )) are evaluated. The localization length decreases with increasing magnetic field for all samples and is significantly larger in T/P than in FT/P composites. This work demonstrates a simple and effective strategy to achieve tunable negative MR at room temperature PANI composites for magnetic sensing and data-storage applications.
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RSC Advances
·
2026
·Vol. 16
·期 13
·12165-12179
·
IF 6.1
Waqas Saeed,Ye Tian,Irshad Ahmad Mir,Baoji Miao,Amna Manzoor,Surjyakanta Rana,Xing Chen
Ammonia (NH3) detection at room temperature under varying humidity conditions is crucial for environmental monitoring, industrial safety, and healthcare. However, ammonia detection remains a challenge due to the lack of sensitivity and selectivity of current room temperature based sensors. In this context, Ti3C2Tx MXene and flower-like SnS2 composites were investigated for NH3 sensing. A comparative analysis of multilayered and few-layered nanohybrid composites demonstrated that the few-layered configuration displayed a markedly enhanced response to ammonia. Its larger surface area, higher electrical conductivity, and higher number of active sites contribute to its superior gas diffusion and charge transfer properties. The composite was further functionalized with Nafion (NF) to enhance sensitivity and selectivity under humid conditions. In an optimized NF-functionalized few-layered Ti3C2Tx/SnS2 sensor, we achieved a 12.11 response ratio towards 100 ppm NH3, with a response time of 42 s and a recovery time of 156 s, as well as excellent selectivity towards interfering gases. Reliability tests conducted in humid environments confirmed the excellent operational stability and durability of the proposed sensor. These experimental results demonstrate that the developed few-layered Ti3C2Tx/SnS2/NF nanohybrid composite provides a highly durable, sensitive, and selective platform for NH3 detection in practical applications at room temperature.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2026
·
IF 6.6
Tao Zhou,Xianghua Zhao,Jiangfan Liao,Qingrun Xie,Mingli Xu,Tai Li,Guoqiang Lv,Xiufeng Li,Wenhui Ma
The rapid growth of the photovoltaic (PV) industry has resulted in massive generation of silicon wafer debris, posing both environmental and resource-utilization challenges. Achieving sustainable and high-value use of this silicon waste for photoelectrochemical hydrogen evolution reaction (PEC-HER) remains highly desirable yet technically challenging. Silicon wafer debris was etched via a metal-assisted chemical etching (MACE) process to obtain silicon nanowires (Si NWs). The morphology of MoS 2 was further tailored through a polyvinylpyrrolidone (PVP)-assisted hydrothermal method, followed by the formation of MoS 2 /Si NWs heterostructures. This sustainable strategy integrates resource recycling with morphology control and heterostructure engineering, enabling uniform MoS 2 coverage, optimized interfacial coupling, and accelerated charge transfer, thereby enhancing the PEC-HER efficiency. The Nano-MoS 2 /Si NWs exhibited a Tafel slope of 167 mV⋅dec −1 , significantly lower than that of pristine Si NWs (524 mV⋅dec −1 ), indicating accelerated hydrogen evolution kinetics. The hydrogen production rate reached 404.77 μmol cm −2 , corresponding to a 196.3% enhancement compared with Si NWs (136.62 μmol cm −2 ). Finite element analysis further revealed markedly enhanced and uniformly distributed current density and surface H + concentration for MoS 2 /Si NWs, attributed to their abundant exposed active edge sites and improved interfacial charge transfer, which collectively contribute to the enhanced PEC-HER performance. This work advances a sustainable upcycling route that converts PV silicon wafer debris into functional photocathodes and offers a general approach to morphology control and heterostructure engineering for efficient, eco-friendly solar-to-hydrogen conversion.
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ANALYST
·
2026
·
IF 3.6
Huiqi Zhu,Ying Chen,Weiqing Yang,Zunxiang Zeng,Yuling Hu,Ji Zhang
The inherently weak Raman signals from molecules with small scattering cross-sections pose a significant challenge for surface-enhanced Raman scattering (SERS), a technique that is further limited by its reliance on costly precious metal substrates and exogenous labeling strategies. To address these limitations, this study constructs a Ti3C2–CoFe2O4 heterostructure by anchoring oxidase (OXD)-like CoFe2O4 nanoparticles (NPs) on two-dimensional (2D) conductive Ti3C2 MXene nanosheets. The resulting interface forms a Mott–Schottky junction, which facilitates rapid charge transfer and synergistically enhances both catalytic and SERS performance. Structurally, the 2D Ti3C2 framework provides abundant anchoring sites for the uniform dispersion of CoFe2O4 NPs. This effectively prevents particle aggregation and maximizes the exposure of catalytic active sites, thereby enhancing both stability and catalytic activity. Additionally, the Ti3C2–CoFe2O4 heterojunction effectively suppresses the recombination of charge carriers and promotes the separation of photogenerated charges, generating abundant superoxide anion radicals that oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) for catalytic signal amplification. Therefore, the ingenious combination of nanozymes and SERS technology enables the generation of SERS-active reporters via nanozyme-catalyzed reactions, thus avoiding the need for external labeling modifications. The strategy simultaneously enhances Raman signals through the synergistic effect of photoinduced charge transfer and localized surface plasmon resonance. This Ti3C2–CoFe2O4 heterojunction exhibits integrated OXD-like activity and SERS enhancement, enabling sensitive glutathione (GSH) detection in human serum samples. Through catalytic oxidation of TMB to oxidized TMB, a distinct Raman peak emerges at 1615 cm−1, with its intensity reduction quantitatively correlating with GSH concentration via competitive reactive oxygen species scavenging. Quantitative analysis demonstrates a linear response range of 0.50–200 μmol L−1 and a detection limit of 0.073 μmol L−1, with serum sample recoveries ranging from 94.7%–115%. This study provides a paradigm for designing non-precious metal nanozyme materials with integrated catalytic and SERS capabilities, demonstrating significant potential for practical applications in clinical diagnostics and biosensing.
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