SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3760-y
Layered chalcogenide compounds have attracted considerable attention for optoelectronic applications due to their rich structural diversity and unique physical properties, including high carrier mobility, ferromagnetism, ferroelectricity, and outstanding optoelectronic and thermoelectric performance. Their tunable bandgaps and strong light absorption render them highly suitable for next-generation photodetectors. However, the environmental instability of many 2D chalcogenides poses a critical challenge for practical applications. In this work, we report a high-performance, polarization-sensitive photodetector based on an air-stable ternary chalcogenide FeIn2Se4. Angle-resolved polarized Raman spectroscopy reveals that the four characteristic Raman modes exhibit a 60° periodic variation in intensity, highlighting the material's pronounced in-plane anisotropy. Benefiting from its strong absorption over a broad spectral range (510–1028 nm), the FeIn2Se4-based device demonstrates reliable photoresponse under multiple excitation wavelengths (405, 473, 515, and 638 nm), showcasing its wideband detection capabilities. Furthermore, XPS measurements after prolonged air exposure confirm the enhanced chemical stability of FeIn2Se4 compared to binary chalcogenides. These findings demonstrate that 2D ternary FeIn2Se4 is an excellent candidate for advanced anisotropic optoelectronic devices, offering broadband photodetection, robust polarization sensitivity, and excellent environmental resilience.
Chinese Journal of Environmental Engineering•2026•DOI: 10.12030/j.cjee.202506031
The production of activated carbon from waste biomass such as cyanobacteria from Lake Taihu represents a promising resource utilization route. However, existing studies are mostly confined to laboratory scale, and the gap between laboratory processes and industrial production hinders the evaluation of technical feasibility and economic viability. This study optimized the process for producing cyanobacteria-based columnar activated carbon by co-processing cyanobacteria with garden waste (sawdust), and validated the process on an engineering-scale production line with a daily capacity of 5 t of raw materials. Economic feasibility was also assessed. Results showed that the optimized activated carbon exhibited a particle strength of 91.3% and a specific surface area of 571.44 m2·g−1. The engineering-scale line processed 5 t of raw materials daily, yielding approximately 1.18 t of activated carbon with stable quality: strength of 94.3% and specific surface area of 471.42 m2·g−1, featuring a microporous-dominant structure with coexisting micropores and mesopores. Cost analysis indicated a production cost of 3,595.65 CNY per ton of activated carbon, demonstrating favorable economic benefits. This work provides a basis for larger-scale production and application of cyanobacteria-based activated carbon.
Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2025032401
Diazepam (DZP), a benzodiazepine anxiolytic drug, has been a persistent contaminant in fishery water environments. In China, DZP is classified as a veterinary drug that must not be detected in animal-derived foods, yet it is frequently found in aquatic products, posing significant risks to ecological health and food safety. This review systematically summarizes the current pollution status of DZP in fishery water and its adverse effects on aquatic organisms, emphasizing its persistence in both water and aquatic products. The paper comprehensively examines advances in detection techniques, including gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-tandem mass spectrometry (LC-MS/MS), as well as treatment technologies such as adsorption, photolysis, chemical oxidation, and biodegradation. Critical gaps remain in the integration of these technologies for practical remediation. The review underscores the urgent need for enhanced monitoring and risk assessment of DZP contamination, alongside the development of more efficient and scalable treatment methods. By consolidating current knowledge, this work provides technical support for aquatic organism protection and fishery water management, and serves as a reference for future research and technological innovation in this field.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-4274-x
The escalating power density of electronic devices necessitates effective visible-light shielding in advanced packaging to ensure circuit security and long-term reliability. Photosensitive polyimides (PSPI) serve dual roles as photodefinable dielectrics and structural layers, but intrinsically black PSPI (B-PSPI) suffer from competitive ultraviolet (UV) absorption between chromophores and photosensitive moieties, limiting co-optimization of deep visible-light blocking and lithographic resolution. Here, we report a main-/side-chain spatial decoupling strategy to synthesize a novel B-PSPI. By polymerizing pyromellitic dianhydride with a main-chain coloring monomer (4,4'-diaminodiphenylamine) and a side-chain photosensitive monomer (1,4-dihydropyridine-functionalized diamine), the monomer stoichiometric ratio is precisely engineered. This design spatially isolates functional groups and enhances charge transfer, yielding exceptional visible-light shielding (CIE L* index of 21.39, cut-off wavelength ≈ 555 nm) with good lithographic sensitivity. UV exposure triggers in situ generation of coordination sites from photosensitive groups, anchoring active metal species for electroless copper plating. This enables direct additive fabrication of fine copper lines (40/80 μm line width/spacing) with robust Cu/B-PSPI interfacial adhesion of 16.6 MPa. This work provides a robust molecular design paradigm for B-PSPI, integrating superior optical shielding and surface metallization for high-density interconnect applications.
SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3463-x
Triple negative breast cancer (TNBC) exhibits an exceptionally low responsiveness to immunotherapy due to its immunologically cold tumor microenvironment (TME), characterized by poor T-cell infiltration and abundant immunosuppressive cells. We synthesized a series of immune-activating lipo-polylysines (IAP-1 to IAP-9) with varying carbon chain and polylysine segment lengths, and evaluated their oncolytic and immunogenic cell death (ICD)-inducing activities. Both activities are structure-dependent. IAP-4 demonstrated the most potent oncolytic and ICD-inducing capabilities in 4T1 tumor cells, inducing necrosis via membrane lysis and mitochondrial damage, and triggering ICD as evidenced by calreticulin exposure, ATP secretion, and HMGB1 release. In vivo, IAP-4 remodeled the TME by enhancing cytotoxic T lymphocyte infiltration and reducing immunosuppressive components, converting cold tumors to hot. This led to inhibition of primary tumors, suppression of recurrence and metastasis, and establishment of antitumor immune memory. This drug-free strategy offers a promising approach for TNBC immunotherapy, with structure-activity relationships providing a framework for designing next-generation oncolytic agents.
SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3454-7
Constructing heterostructures with favorable catalytic activities is crucial for improving seawater electrolysis. Herein, we report a strongly coupled Pt-W2N heterostructure embedded within porous conductive carbon nanoflowers (Pt-W2N@C) as a highly efficient and durable cathode electrocatalyst for seawater electrolysis. Through in situ Raman spectroscopy and electrochemical analysis, we elucidate that the Pt-W2N@C system leverages synergistic electronic interactions at the heterointerface to concurrently optimize the adsorption of H* and OH* intermediates while enhancing water dissociation kinetics. The optimized Pt-W2N@C catalyst exhibits superior hydrogen evolution reaction (HER) performance across acidic, neutral, and alkaline electrolytes, achieving overpotentials of 1.2, 7, and 32.2 mV, respectively, at 10 mA cm−2, significantly outperforming commercial 20 wt% Pt/C benchmarks. Notably, the Pt-W2N@C catalyst exhibits exceptional performance in alkaline seawater electrolysis, achieving ultra-low HER overpotential (163.8 mV at 700 mA cm−2) alongside superior chloride tolerance and HER performance under 0.5–2.5 M NaCl. Remarkably, in a practical seawater electrolyzer (Pt-W2N@C||NiFe-layered double hydroxide (LDH)), it requires only 1.992 V to drive 500 mA cm−2 while maintaining 95.8% activity retention over 80 h of continuous operation. These findings highlight the advantages of heterostructures and their cooperative effects in designing next-generation electrocatalysts for practical seawater electrolysis.