CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lizheng Jin,Zheng Yang,Qing Liu,Jingyi Sun,Boyu Liu,Zheyu Gui,Yue Wu,Kangxin Zhu,Lvfu Song,Xi Chen,Xin Zheng,Sai Wu,Zhehong Shen,Hao Chen,Yajun Pang
Solar-powered atmospheric water harvesting (AWH) technology shows great promise for solving water shortage problems for inland and arid regions. The development of low-cost and low-environmental impact sorbent materials with high water absorption and photothermal properties is critical for their large-scale application. Here, this work develops a high-performance hygroscopic salt-based composite sorbent for solar-powered AWH by taking agricultural waste straw as an example. The straw-based sorbent is facile to prepare, low-cost, environmentally friendly, and offers favorable adsorption and desorption properties. Specifically, high porosity, excellent hydrophilicity, and photothermal conversion properties can be integrally achieved by phytic acid-assisted one-step hydrothermal pretreatment of waste straw, thereby yielding a highly efficient straw/salt-based composite sorbent that can absorb water from the atmosphere over a broad humidity range and rapidly release it when exposed to sunlight. The prepared composite sorbent displays water adsorption from ~0.50 g g −1 to 1.29 g g −1 in the range of 30 % and 90 % relative humidity, exhibiting good capacity to obtain water from the atmosphere. Moreover, solar-driven evaporation desorption can be successfully achieved with an ~0.82 kg m −2 h −1 evaporation rate, double that of the original straw material, showing excellent solar-driven desorption efficiency. Furthermore, the composite sorbent demonstrates promising practical utilization by achieving ~0.81 g g −1 water adsorption and succeeding in condensing and harvesting 69 % of it in the outdoor test under natural conditions. This study provides an affordable solar-powered solution for atmospheric water harvesting together with promoting high-value utilization of agricultural waste.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Tian Xia,Jiaxiang Liu,Jianqiao Zhang,Wenxiang Tang,Jianxin Xue,Liying Hao,Jianrong Zeng,Shushen Chen,Ziming Li,Yan Song,Jixiang Li
The uranium extraction from seawater (UES) by adsorption is considered to be a promising method. However, current adsorbents suffer from insufficient exposure of active sites, limiting their accessibility for uranyl ion (UO₂ 2+ ) binding. In this work, a phytic acid-functionalized covalent organic framework (COF-PA) was successfully synthesized for highly efficient uranium extraction from seawater. COF-PA surfaces exhibited numerous rod-like protrusions, exposing additional active sites. Furthermore, the incorporation of phytic acid endowed the material with abundant phosphate groups, which exhibited strong coordination ability with uranyl ions, leading to a remarkable adsorption capacity (Q m = 645.6 mg g −1 ). The adsorption capacity achieved in natural seawater over a 15-day period was 2 mg g −1 . Additionally, the COF-PA demonstrated exceptional selectivity for UO 2 2+ over competing metal ions and maintained over 70 % of its initial adsorption capacity after four regeneration cycles, highlighting its robust reusability. Furthermore, mechanistic investigations, including X-ray photoelectron spectroscopy, X-ray absorption fine structure spectroscopy and density functional theory calculations, revealed that the adsorption process is driven by chemisorption, where phosphate groups act as bidentate ligands to form stable equatorial coordination bonds with uranium. This work provides a novel strategy for designing functionalized COFs with natural, eco-friendly ligands for UES.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Sen Fu,Yucheng Wang,Yijie Liu,Jintang Zhou,Wenhui Zhu,Wentao Zhou,Weimeng Chu,Lvtong Duan,Yao Ma,Zhengjun Yao
Introducing heteroatoms into carbon materials to tailor their electronic structures has emerged as an effective strategy for enhancing electromagnetic wave absorption (EMA) properties. However, the synergistic effect of incorporating polar functional groups and crystal defects via heteroatom doping remains underexplored. In this study, a sodium chloride templating method combined with pyrolysis was employed to systematically optimize the nitrogen–phosphorus codoping ratio and calcination temperature, thereby modulating the surface chemistry and pore architecture of porous carbon matrices. The results demonstrate that polarization loss arising from polar groups and crystal defects, along with conductive and multiple scattering losses facilitated by the porous structure, collectively contribute to an enhanced dielectric loss mechanism. Consequently, the optimized material exhibits an effective absorption bandwidth of 5.53 GHz at a thickness of only 2.0 mm. This work highlights the role of N–P codoping in tailoring surface chemistry at the atomic scale, offering a valuable design strategy for next-generation electromagnetic wave absorbing materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zihan Zhao,Chunfeng Li,Ruiwen Yu,Lei Le,Mingli Liu,Zhihao Zhang
In order to improve the fire safety performance of wood, an explainable ceramicized organic–inorganic hybrid flame retardant coating was prepared in this study. An organic flame retardant containing nitrogen and phosphorus was first prepared by reacting phytic acid and melamine, followed by the introduction of glass powder and boron nitride to form an organic–inorganic hybridized coating. When the wood is exposed to flame, the coating forms a lava-like ceramic char layer that protects the substrate. Flame retardant test data show that the coating exhibits excellent flame retardancy with an limiting oxygen index of 36.3 %. Compared with pure wood, the peak heat release rate (pHRR) and total heat release (THR) of wood coated with a hybrid coating were significantly reduced by 64.7% and 31.3%, respectively. Furthermore, when coated wood is used in outdoor construction, its fire resistance is far superior to that of pure wood. This study provides an economical and effective solution to enhance the fire safety of wood in modern buildings.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Jiaying Xu,Zhenfeng Cheng,Fuhao Yu,Zhimin Song,Jing Fang,Hao Li,Bibo Wang,Yuan Hu
Poly (butylene adipate-co-butylene terephthalate) (PBAT) is a biodegradable and environmentally friendly material. However, due to its flammability and the formation of molten droplets during combustion, green flame retardants need to be added to enhance fire safety while maintaining environmental friendliness. In this work, a rod-shaped magnesium hydroxide carbonate (BMC) was synthesized as a flame retardant and combined with the bio-based phytic acid melamine supramolecular (PM). The micrometer-sized rod-shaped BMC acts as the “corn cob”, while the spherical particles formed by PM supramolecules act as the “corn kernels”. They are structurally locked together through acid-base neutralization, forming a unique “corn-like” hetero-sized assembly structure (PMBMC). When 20 wt% PMBMC is added to PBAT, the composite material passes the UL-94 test and the LOI reaches 28.8 %. Meanwhile, it can reduce PHRR, THR, and MARHE by 82.9 %, 12.2 %, and 69.1 %. Additionally, SP, CO 2 P, and COP are reduced by 92.7 %, 81.3 %, and 82.6 %, respectively. Moreover, compared with the unmodified flame retardant, the Eb and Ts of PBAT/PMBMC increase by 13.6 %, and 51.6 % due to the hydrogen bond. In conclusion, this study provides a new idea for the development of efficient and environmentally friendly PBAT green material flame retardant and smoke suppressant by using natural bio-based materials.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Sheng Cai,Yirong Zhang,Zhi ming Liu,Luming Tian,Deliang He,Ruirui Zhu,Yan Xing
In this study, a novel carbon aerogel adsorbent (Mn-PA-CS) was synthesized through a one-step calcination-activation method using manganese acetate as the precursor. Unlike conventional phytic acid-activated carbons, this work introduces manganese doping as an effective strategy to tailor the pore structure and surface chemistry. The resulting material features enriched surface P/O functional groups and a significantly increased proportion of micropores (0.7–0.8 nm), which closely match the hydration diameter of Pb(II) ions, alongside elevated defect density (ID/IG = 0.94). These modifications synergistically promote adsorption through micropore filling, electrostatic attraction, and surface complexation. The optimized Mn-PA-CS, prepared with 100 mg of manganese acetate, exhibited a high Pb(II) uptake capacity of 302.88 mg·g -1 , which represents a 132.43% improvement compared to the undoped material. The adsorption behavior followed pseudo-second-order kinetics and the Freundlich isotherm, suggesting a spontaneous, endothermic, and multilayer chemisorption process. This study indicates that transition metal doping is a promising strategy for regulating the adsorption performance of bio-derived carbon materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）