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[Display omitted] • Acetal-mediated DES mildly and effectively separated lignin (68%) from BP. • Acetal-mediated DES preserved β-O-4 structures (68.60%) and inhibited low β-5 content (19.51 %) • Regenerated lignin depolymerization monomer yield reaches 40.94% • Lignin with lighter color showed good performance in sunscreen and depolymerization. • Cellulose severed as smart indicator film for visually detecting the freshness of shrimp. Full utilization of biomass after fractionation of its components is an effective way to maximize the value of biomass. Herein, in this study, a new acetal-mediated deep eutectic solvent (DES) was explored and its excellent performance in separating lignin from biomass as well as retarding lignin condensation has been observed. Subsequently, the separated lignin and cellulose-rich residue were used to prepare sunscreen and transparent food indicator films, respectively. The results showed that the acetal-mediated DES pretreatment can reduce the recalcitrance of bagasse, stabilize lignin (β-O-4 content of 68.6% in the lignin), and retain most of the cellulose (ie. 83.43%). Besides, the pretreatment enhanced the subsequent hydrogenolysis of lignin, and the higher β-O-4 content of the lignin contributed to the high yield of aromatic monomers (40.94%). In addition, regenerated lignin was attractive for sunscreen applications due to its lighter color and excellent UV-blocking properties. Furthermore, cellulose smart indicator film was highly sensitive, biodegradable, has excellent physical properties, and allows visual real-time monitoring of seafood spoilage using smartphones. Meanwhile, the yield of the removed hemicellulose converted to xylose in the pretreatment process reached 99.24%. In general, this work proposed a sustainable bio-refinery approach for the full upgrading of biomass. [ABSTRACT FROM AUTHOR]

[Display omitted] • A simple strategy for achieving efficient doping-free TADF OLEDs was developed. • Multiple shielding groups reduced ACQ effect and enhanced PLQY of neat film. • The ultrathin doping-free OLEDs achieved unprecedented EQE over 30 % at 620 nm. The application of doping-free emitting layers in organic light-emitting diodes (OLEDs) device fabrication has attracted extensive attention due to the simplified process and the low cost. Meanwhile, the application of interfacially doping layer (or ultrathin emissive layer, UEML) with a thickness below 1 nm showed great potential in achieving high device efficiency by reducing the aggregation-caused quenching (ACQ) effect, which was usually observed in neat film and highly doped dopant-host system. This work developed a simple molecular design strategy via peripheral decoration of TADF emissive core with multiple shielding groups (t -butyl and aryl units) to effectively alleviate the intermolecular interaction and the ACQ effect. The resulting OLEDs based on BIPH-TPA exhibited a record-setting external quantum efficiency (EQE) of 15.8 % at 640 nm with a conventional doping-free configuration (25 nm). Furthermore, the ultrathin doping-free (0.2 nm) OLEDs based on NA-TPA achieved unprecedented EQE of 33.1 % at 620 nm. The outstanding EL performance clearly demonstrated promising potential of this molecular design strategy for the exploration of doping-free OLEDs. [ABSTRACT FROM AUTHOR]

[Display omitted] • A series of V-based Si-group intermetallic compounds were successfully synthesized. • The excellent HER activity of V 3 Si in V-based Si-group intermetallic compounds. • High electronic conductivity and a suitable d -band center contributed to an excellent performance by HER. • Providing the fundamental guidance of rational design of desirable silicide electrocatalysts. Exploring high-efficiency and low-cost electrocatalysts is valuable for water-splitting technologies. Recently, Si-group compounds have attracted increasing attention in electrocatalysis, considering the abundant Si-group elements on Earth. However, Si-group compounds for HER electrocatalysis have not been systematically studied. In this study, we unveil the activity trends of non-noble metal catalyst A15-type V 3 M (i.e. , V 3 Si, V 3 Ge, and V 3 Sn) superconductors and show that V 3 Si is the most efficient HER catalyst because of the high electronic conductivity and suitable d -band center. Among them, the V 3 Si only requires 33.4 mV to reach 10 mA cm−2, and only 57.6 mV and 114.6 mV are required to attain a high current density of 100 mA cm−2 and 500 mA cm−2, respectively. These low overpotentials are close to the 34.3 mV at 10 mA cm−2 of state-of-art Pt/C (20 %) but superior to 168.5 mV of Pt/C (20 %) at 100 mA cm−2. Furthermore, the V 3 Si illustrates exceptional durability with no obvious decay in the 120 h at the different current densities (i.e. , 10–250 mA cm−2). The excellent HER activity of V 3 Si alloy can be ascribed to the synergies of superior electronic conductivity and suitable d -band center. Moreover, DFT calculations reveal that |ΔG H* | is decreased after introducing the V to Si. Beyond offering a stable and high-performance electrocatalyst in an acidic medium, this work inspires the rational design of desirable silicide electrocatalysts. [ABSTRACT FROM AUTHOR]

• A paper-based assay was developed for real-time, onsite, and dual-signal detection of ATP. • The assay integrated the ATP-responsive ZIF-90 collapse and inhibition effect of ZIF-90 for nanozyme. • The analytical signals combined the distance- and colorimetric- readout. • A paper-based kit was designed to achieve standardized ATP onsite detection. Adenosine triphosphate (ATP) is an important biological biomarker, but its rapid extracellular decomposition poses challenges for on-site detection. We report a paper-based dual-readout viscosity flow sensor enabling rapid, equipment-free quantification of ATP. The assay integrates molybdenum disulfide nanozymes for signal amplification with zeolitic imidazolate framework-90 (ZIF-90) for selective ATP recognition and nanozyme regulation. In the presence of ATP, the intact chitosanase-encapsulated ZIF-90 structure was disintegrated to release chitosanase and thus hydrolyzed chitosan hydrogel, decreasing the viscosity of chitosan solution. Moreover, elimination of ZIF-90 inhibitory effect reactivated the catalytic activity of MoS 2 nanozyme, resulting in the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to produce obvious color change. The analytical signals, combining the distance- and colorimetric- readout, were directly displayed on filter paper without further processed. The proposed dual-readout viscosity flow sensor exhibited remarkable sensitivity for ATP detection with detection limits down to 0.038 nM with the distance-readout and 0.057 nM for the colorimetric-readout. Furthermore, we developed an integrated paper kit with a printed scale and color card for standardized on-site analysis without instrumentation. Successful application for ATP quantification in bacterial biofilms and blood samples demonstrates the sensor's strong performance and potential for decentralized testing. [ABSTRACT FROM AUTHOR]