SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3662-4
Luminescent thermometry has become a research hotspot due to its high spatial resolution, fast response, and non-invasive nature. However, achieving high-performance temperature imaging requires both luminescent materials with high temperature sensitivity and efficient imaging methods, which remains a significant challenge. In this study, a series of pure-phase rubidium germanate phosphors doped with manganese were synthesized and encapsulated into polydimethylsiloxane (PDMS) films to improve chemical stability. The dramatic temperature-dependent luminescence behavior of Mn4+ in the Rb2Ge4O9 matrix provides reliable and efficient methods for temperature sensing. The high-sensitivity temperature sensing capability of the Rb2Ge4O9:0.002 Mn4+ fluorescent film has been confirmed, leveraging temperature-dependent emission intensity, luminescence decay lifetime, and time-resolved intensity ratio techniques. Notably, Rb2Ge4O9:Mn4+ fluorescent film exhibits a strikingly high relative sensitivity of 17.03% K−1 at 330 K in the time-resolved thermometry scheme, which is the highest relative temperature sensitivity within the physiological temperature range known to us. High-performance temperature imaging of the fluorescent film is achieved through the time-resolved intensity ratio strategy with a best practical temperature resolution of 0.08 K at 325 K. Furthermore, the temperature images of an operating nickel circuit with a line width of 20 μm under different working currents were recorded, showing a clear circuit microstructure and temperature gradient. These findings pave a novel path for realizing high-performance temperature imaging.
Journal of Fuel Chemistry and Technology•2026•DOI: 10.1016/S1872-5813(26)60644-5
Lignin, as the sole renewable source of aromatic compounds, holds significant potential for producing green aviation fuel-range arenes via hydrodeoxygenation (HDO). In this study, a series of nitrogen-doped carbon-supported FeMoS/NC bimetallic catalysts were synthesized via a hydrothermal method. The HDO performance was evaluated using 4-ethylguaiacol as a model compound at 340 °C under 3 MPa H2. The unmodified MoS2/NC catalyst achieved a deoxygenation degree of 83.4%, whereas the Fe-modified catalyst with an optimal Fe/Mo molar ratio of 0.3 (Fe0.3MoS/NC) attained complete deoxygenation (100%) with an arenes selectivity of 78.6%. Beyond this optimal ratio, the deoxygenation degree inversely correlated with the Fe/Mo molar ratio. Characterization via XRD, TEM, BET, and XPS revealed that Fe incorporation enhanced the uniform dispersion of MoS2 on the NC support, increased surface acidity, and raised the concentration of sulfur vacancies, thereby promoting adsorption of oxygen-containing compounds. The HDO pathway over Fe0.3MoS/NC primarily proceeded via direct deoxygenation. When applied to real lignin under identical conditions (340 °C, 3 MPa H2, 12 h), the catalyst yielded 65.5% green hydrocarbons, with the C8–C16 fraction accounting for 54.4% of total hydrocarbons and an aromatic selectivity of 63.4% within this fraction. These results demonstrate that Fe0.3MoS/NC is a viable catalyst for selective conversion of lignin into green arenes suitable for sustainable aviation fuel applications.
Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2025040104
The oxidative transformation of 2,6-dichlorophenol (2,6-DCP) was investigated in three typical zonal soils: black soil, red soil, and brown soil. Results demonstrated that 2,6-DCP underwent oxidative coupling in all soils, yielding hydroxylated polychlorinated diphenyl ethers (OH-PCDEs) and hydroxylated polychlorinated biphenyls (OH-PCBs) as primary products. The highest oxidative efficiency occurred in black soil, with approximately 85.1% of 2,6-DCP transformed within three days. In contrast, red and brown soils exhibited lower efficiencies, indicating a strong dependence on soil properties. Thermodynamic analysis revealed that the oxidative coupling reaction is endothermic, with elevated temperatures favoring reaction progress. Furthermore, soil microorganisms and dissolved oxygen were identified as critical controlling factors, acting synergistically to drive the reaction. This study provides the first evidence of natural oxidative coupling of 2,6-DCP in soil, forming OH-PCDEs and OH-PCBs. These findings offer significant scientific insight into the environmental fate of halogenated phenolic pollutants in terrestrial systems.