SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4480-1
Ternary organic solar cells (OSCs) incorporating a structurally compatible guest acceptor (C7-Cl) into the PM6:BTP-eC9 host system are demonstrated. The low Flory-Huggins interaction parameter between host and guest acceptors facilitates intimate mixing, optimizing molecular packing and energy-level alignment. High-sensitivity sEQE and EQEEL analyses reveal a reduced non-radiative energy loss (KE3) of 0.216 eV in the ternary device. Consequently, the optimized ternary OSC achieves a champion power conversion efficiency (PCE) of 20.02% and an improved T80 operational lifetime of 1065 h. This work establishes a feasible strategy via structurally compatible guest doping to simultaneously optimize vertical phase separation and suppress non-radiative loss, providing a facile and effective route toward high-performance and stable OSCs.
Chinese Journal of Environmental Engineering•2026•DOI: 10.12030/j.cjee.202507111
This study investigated the effects of a ring-shaped pulsed electric field (PEF) (1.5 V, 4 h on-time per cycle) on nitrogen removal performance and microbial community structure of anammox granular sludge (AnGS). Two anaerobic sequencing batch reactors (R1 control, R2 with PEF) were operated under stepwise increasing nitrogen loading rates (NLR). At NLR below 1,155 mg·(L·d)−1, R2 exhibited total nitrogen removal efficiency (TRE) 7.5%–17.0% higher than R1, with biomass, specific anammox activity (SAA), and extracellular polymeric substances (EPS) increased by 5%–7%, 21%–71%, and 54%–77%, respectively. However, at NLR above 1,320 mg·(L·d)−1, the toxic effect of nitrite dominated, and PEF enhancement diminished or even reversed to inhibition. Microbial community analysis revealed that at low-to-moderate NLR, PEF increased the relative abundance of Planctomycetes and key anammox bacteria (Candidatus Brocadia and Candidatus Jettenia), along with enhanced community richness (Chao1) and diversity (Shannon/Simpson indices). At high NLR, PEF decreased microbial richness compared to R1. Principal component analysis and redundancy analysis indicated that PEF was the key factor driving community differences at low-to-moderate NLR, whereas nitrite concentration became the dominant factor at high NLR. This study provides theoretical support for enhancing the resilience and engineering application of anammox processes.
Chinese Journal of Environmental Engineering•2026•DOI: 10.12030/j.cjee.202509004
Acetone, a widely used solvent in the pharmaceutical industry, poses environmental and economic challenges due to its high volatility and the low concentration of acetone in water-based absorbents, which complicates recovery. This study proposes a composite absorbent comprising 1,4-butanediol (BDO), triethylene glycol, sodium citrate, and water, aiming to enhance acetone absorption capacity and enable cost-effective resource recovery. Response surface methodology optimized the absorbent composition to BDO 35%, triethylene glycol 10%, and sodium citrate 5%, achieving an acetone absorption capacity of 51.97 g·kg−1, which is 2.39 times that of pure water (21.77 g·kg−1). Density functional theory (DFT) calculations and AIM topological analysis revealed that BDO forms stronger hydrogen bonds with acetone, characterized by shorter bond lengths and higher electron density, underpinning its superior molecular recognition and absorption capability. Process simulation of absorption-regeneration cycles demonstrated that, compared to pure water, the composite absorbent reduces absorbent consumption by 36.2% and regeneration energy consumption by 41.15% while achieving effluent acetone concentrations below 100 mg·m−3. This multi-scale investigation, spanning macroscopic experiments, molecular mechanisms, and process simulation, validates the feasibility and advantages of BDO-based composite absorbents for VOC control, providing theoretical and data support for the engineering application of alcohol-based absorbents in efficient organic pollutant separation.