Yang Wang

The sluggish kinetics of photocatalytic N2 fixation primarily originate from the multi‐electron reduction barrier. To address this, we prepare defect‐rich TiO2 nanobelts via a three-step approach involving solvothermal, ultrasonic exfoliation, and subsequent annealing method. The defects not only boost N2 adsorption and activation but also store electrons upon illumination. These stored electrons subsequently drive the multi-electron reduction and improve reaction kinetics. As a result, the defect‐engineered nanobelts exhibit an ammonia‐production rate reaching 513.0 μmol h-1g-1 under full-spectrum illumination.

Binder-free self-supporting lithium-aluminum layered double hydroxides (SS@LAL) hold significant promise for lithium extraction. However, their practical deployment remains limited by inherently low adsorption capacity and sluggish kinetics. Herein, we report a hydrothermally synthesized SS@LAL fabricated directly on aluminum foil and co-intercalated with PO43- and Fe ions (SS@LAL-P-Fe). Thanks to the enhanced structural stability provided by phosphate and iron ions, the aluminum-based adsorption electrode exhibits excellent cycling stability under electric field assistance, achieving saturation within 60 min and a maximum adsorption capacity of 9.24 mg g-1. In-situ characterization further demonstrates that the doped Fe serves as reversible redox mediators, facilitating rapid Li⁺ insertion/extraction and thereby underpinning the superior lithium extraction performance. This study provides a new approach for the efficient application of aluminum-based lithium adsorption materials.

Binder-free self-supporting lithium-aluminum layered double hydroxides (SS@LAL) hold significant promise for lithium extraction. However, their practical deployment remains limited by inherently low adsorption capacity and sluggish kinetics. Herein, we report a hydrothermally synthesized SS@LAL fabricated directly on aluminum foil and co-intercalated with PO43- and Fe ions (SS@LAL-P-Fe). Thanks to the enhanced structural stability provided by phosphate and iron ions, the aluminum-based adsorption electrode exhibits excellent cycling stability under electric field assistance, achieving saturation within 60 min and a maximum adsorption capacity of 9.24 mg g-1. In-situ characterization further demonstrates that the doped Fe serves as reversible redox mediators, facilitating rapid Li⁺ insertion/extraction and thereby underpinning the superior lithium extraction performance. This study provides a new approach for the efficient application of aluminum-based lithium adsorption materials.

To address the urgent global challenges of climate change and energy demand, photocatalytic CO ₂ reduction has emerged as a pivotal technology that moves beyond simple renewable energy harvesting by using solar energy to convert CO ₂ into valuable fuels and chemicals, thus actively reducing carbon emissions. Recently, organic polymer photocatalysts have emerged as a promising alternative, offering pyrolysis‐free synthesis, high surface areas, and exceptional molecular‐level tunability. In this review, we provide a comprehensive overview of the rational design and engineering of organic polymers for photocatalytic CO ₂ reduction. First, we present the fundamental mechanisms of the CO ₂ reduction reaction and the key principles for designing organic polymer photocatalysts. We then provide a systematic analysis of design engineering at the molecular level, with a focus on tailored strategies to boost light absorption, charge separation/transfer, and surface reaction. Furthermore, various organic polymer photocatalysts, ranging from linear conjugated polymers and carbon nitrides to conjugated microporous polymers, metal–organic frameworks, hypercrosslinked polymers, and supramolecular polymers, are summarized. Finally, the review concludes with perspectives on current challenges and future research directions, aiming to guide the design of high‐performance polymer photocatalysts and advance the understanding of structure‐performance relationships in artificial photosynthesis.

The photocatalytic conversion of nitrogen into high-value ammonia products holds tremendous potential in the global nitrogen cycle. However, the activation of N₂ and competition of hydrogen evolution limit the improvement of nitrogen fixation performance. In this study, we developed a fluorinated TiO₂ (F-TiO₂) using a hydrothermal-annealing method. The incorporation of F dopants not only enhances the adsorption and activation of N₂ through electronic structure regulation, but also facilitates an in situ increase in active sites via the electron repulsion effect between F and Ti atoms. In addition, the presence of F on the surface effectively improved the nitrogen supply problem and optimized the nitrogen fixation selectivity for its hydrophobic modulation. The NH₃ yield of the F-TiO₂ photocatalyst reached 63.8 μmol h⁻¹ g⁻¹, which was 8.5 times higher than that of pure TiO₂. And the selectivity experiment showed that the electronic ratio of NH₃ to H₂ production reached 0.890. This research offers valuable insights for the design of highly efficient and selective nitrogen-fixing photocatalysts.