MOLECULES
·
2025
·Vol. 30
·期 4
·878
·
IF 4.6
Ruijia Hu,Weihao Li,Xi Zhou,Shunmin Yi,Xingfu Zheng,Qiufeng Mo,Wanyu Liu
A novel lignocellulose-based poly(butylene 3-propyladipate-co-furanoate) (PBApF) was synthesized from lignocellulose-derived 3-propyladipic acid (3PAA), 1,4-butanediol (BDO), and 2,5-furandicarboxylic acid (FDCA). The copolyesters were characterized by1H NMR, GPC, DSC, TGA, XRD, DMA, rotational rheology, tensile tests, and enzymatic degradation tests. They were random copolymers whose composition was well controlled, and the number-average sequence lengths of the copolyesters were around 1.35–4.33. By combining the results of tensile tests and DMA, the elongation at break of PBApF45(1865%) had a much greater value than that of PBAF45(1250%), i.e., the branching incorporated into the linear polymer increased the melt strength and conferred tension-hardening properties, which helped to enhance the elongation of the polymer. In addition, the influences of 3PAA content on enzymatic degradation were studied in terms of weight loss; when the content of 3PAA was 55 mol%, the copolyesters exhibited good biodegradability. Thus, depending on their composition, PBApFSmight find end applications as biodegradable elastomers or impact modifiers for other polymers.
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高影响因子
Nature Sustainability
·
2024
·
IF 25.7
Hu Qi,Zhou Weiliang,Qi Shuai,Huo Qihua,Li Xuan,Lv Miaoyuan,Chen Xinbao,Feng Chao,Yu Jiaying,Chai Xiaoyan,Yang Hengpan,He Chuanxin
The urea industry is energy intensive and responsible for high levels of carbon emissions. Electrocatalytic co-reduction of carbon dioxide (CO 2 ) and nitrate (NO 3 − ) powered by renewable energy offers an alternative and sustainable synthetic pathway to this chemical that is vital in agriculture, chemical engineering and other fields, but the yield rate cannot compete with the state-of-the-art petrochemical processes. Here we show a urea electrosynthesis route using an iron tetraphenylporphyrin molecular electrocatalyst that delivers a maximum Faradaic efficiency of 27.70% for urea while suppressing the competing hydrogen evolution reaction. At the heart of our strategy is electrolysis under pulsed potentials between −0.2 and −0.8 V versus the reversible hydrogen electrode, which increases the local concentration of CO 2 /NO 3 − but reduces the local pH to enrich *CO and *NH 2 intermediates favoured by C–N coupling. Importantly, our strategy can be applied to more catalyst systems such as ZnO and PdCu, and save more than 41% energy consumption compared with static co-electrolysis, with PdCu enabling a maximum urea Faradaic efficiency of 70.36% for pulsed electrolysis. Our work opens an avenue for efficient urea production and provides insights into the role of the local reaction environment, which can inform the rational design of electrocatalysts.
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MACROMOLECULAR BIOSCIENCE
·
2025
·
IF 4.1
Xueyang Wang,Xiaojie Ju,Chunyan He
The local application of minoxidil tincture has been widely used clinically for the treatment of androgenetic alopecia (AGA). However, there are significant limitations, including ineffectiveness on its own, poor patient compliance, and low transdermal absorption. Microneedles (MNs) can puncture the stratum corneum painlessly and increase drug absorption through the skin. Additionally, nitric oxide (NO) has been shown to improve blood supply to hair follicles and reduce inflammation. Therefore, we prepared a kind of hair-growth-promoting MNs that can co-deliver minoxidil and NO donor for AGA treatment. In simple terms, nanogels (MHMA) were formed through the photopolymerization of methacrylate hyaluronic acid (MeHA) and methacrylate arginine (MeArg) as an NO donor. Through optimized formulation design, minoxidil was efficiently encapsulated within the MHMA nanogels with a particle size of 522.9 nm, which facilitates targeting of hair follicles. Subsequently, the MNs were prepared using a micro-molding method. Both in vitro and in vivo experiments demonstrated that the hair-growth-promoting MNs could efficiently deliver minoxidil and NO donor by just 3 min pressing on the mouse skin. It effectively promoted the transition of hair follicles to the growth phase and stimulated angiogenesis around the follicles, ultimately leading to hair regeneration in the alopecia mouse model. Overall, the proposed hair growth hair-growth-promoting MNs can efficiently and painlessly deliver minoxidil and NO donor into the skin, thus offering a promising new direction for clinical AGA treatment.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Chen Zheng,Liu Peng,Cao Yu-Long,Xie Yu-Long
The manganese-based ion sieve H 1.6 Mn 1.6 O 4 shows significant advantages in lithium adsorption. Its prominent features include high adsorption capacity and low pollution characteristics of the preparation process. These combined advantages make this material important in the lithium extraction technology in salt lakes. However, problems such as high manganese dissolution loss rate, poor cyclic stability, and difficulty in powder recycling seriously restrict the industrialized application. In this paper, we propose to optimize the structure of spinel-type manganese lithium ion-sieves with a 2% Co 3+ doping strategy, which can effectively inhibit the lattice collapse triggered by Jahn–Teller aberration during the pickling cycle by replacing part of the Mn 3+ active sites with Co 3+ . After doping, the relative Mn 4+ content on the surface of the material increased from 58%–61% according to the XPS test, confirming that the introduction of Co 3+ facilitated the transition of Mn 3+ to the higher valence state Mn 4+ through the charge compensation effect. Reducing the disproportionation activity of Mn 3+ reduces the dissolution loss of Mn 2+ during the pickling process. The experimental results showed that the adsorption of doped HMCO-2 material increased from 28.8–34.9 mg/g. The adsorption capacity retention rate was 77% after five cycles, there was a high selective adsorption of Li + , and the manganese dissolving loss rate was decreased to 2.3%.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Haoran Guo,Rongrong Chen,Jingyuan Liu,Dalei Song,Xinlang Zuo,Gang Zhu,Qi Liu,Jing Yu,Jiahui Zhu,Peili Liu
Complex marine environments (high salinity, humidity, and temperature) accelerate material degradation, urgently demanding durable coatings with integrated thermal stability and corrosion protection. Currently, phenolic epoxy resins are widely used in marine environments for their excellent corrosion resistance, but their long-term durability is insufficient. In this study, phenyltriethoxysilane (PTES), dimethyldiethoxysilane (DEMS), isopropyl titanate (TPT), and boric acid are employed as functional precursors to synthesize a cross-linked titanium-boron-containing organosilicon resin (TBS) via a facile sol-gel process. The resin is subsequently incorporated into a phenolic epoxy resin (EPN) matrix as a functional modifier, constructing a composite protective system of titanium‑boron co-doped organic-inorganic hybrid coatings with synergistically enhanced anticorrosion performance. The results of the electrochemical impedance spectroscopy (EIS) test show that the hybridized coatings exhibits superior anticorrosive performance when the mass fraction of TBS is 50 %. The low-frequency impedance (|Z| 0.01 Hz ) remains above 10 10 Ω·cm 2 after 30 days immersion in 3.5 wt% NaCl solution. In addition, the TBS 1 -EPN 1 coating retains the most intact surface after 7 days of immersion in acid/alkali solutions. Meanwhile, the heat resistance of the coating is optimized, with the initial decomposition temperature increases to 233 °C. This study provides an excellent strategy for designing high-performance anticorrosion coatings for marine hydrothermal areas.
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Micromachines
·
2025
·Vol. 16
·期 8
·866
·
IF 3
Siqiang Cheng,Yun Cheng,Taoyun Zhou,Shilin Li,Dong Xie,Xinyu Li
Despite significant progress in photoelectrochemical (PEC) water splitting, high fabrication costs and limited efficiency of photoanodes hinder practical applications. Bismuth vanadate (BiVO4), with its low cost, non-toxicity, and suitable band structure, is a promising photoanode material but suffers from poor charge transport, sluggish surface kinetics, and photocorrosion. In this study, porous monoclinic BiVO4films are fabricated via a simplified successive ionic layer adsorption and reaction (SILAR) method, followed by borate treatment and PEC deposition of NiFeOx. The resulting B/BiVO4/NiFeOxphotoanode exhibits a significantly enhanced photocurrent density of 2.45 mA cm−2at 1.23 V vs. RHE—5.3 times higher than pristine BiVO4. It also achieves an ABPE of 0.77% and a charge transfer efficiency of 79.5%. These results demonstrate that dual surface modification via borate and NiFeOxis a cost-effective strategy to improve BiVO4-based PEC water splitting performance. This work provides a promising pathway for the scalable development of efficient and economically viable photoanodes for solar hydrogen production.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Zi-Lu Zhang,Jia-Hui Xin,Xiao-Wei Luo,Wan-Ting Lin,Wan-Long Li,Si-Yuan Zhang,Zi-Jun Zhang,Zhi-Kang Xu,Ling-Shu Wan
The increasing demand for separation and purification at high temperature emphasizes the importance of thermostable thin-film composite (TFC) nanofiltration (NF) membranes. The performance of the selective layer is profoundly influenced by its molecular structure, and thus the optimization of interfacial polymerization monomers can substantially enhance the thermal stability of the NF membranes. Although some new amine monomers have been reported for the preparation of thermostable TFC membranes, piperazine (PIP) and m-phenylenediamine (MPD) are still the most widely used monomers. In this work, a co-monomer strategy integrating PIP with MPD as the aqueous monomers was employed to improve the rigidity of the polyamide selective layer, thereby fabricating thermostable TFC NF membranes. Precise modulation of PIP/MPD ratios enables effective control over the diffusion rate of aromatic monomers, and hence achieves tunable chemical composition and physical properties. Temperature-dependent pore size analysis and molecular dynamics simulations demonstrated that the incorporation of MPD significantly enhances the thermal stability of the polyamide selective layer. Remarkably, the TFC NF membrane maintains exceptional MgSO4 rejection (>98.5%) across a broad temperature range from 25 °C to 85 °C. This research not only provides fundamental insights into the design of co-monomer systems but also establishes a robust strategy for fabricating thermostable NF membranes.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Jiangtao Yang,Yunzhen Jia,Guang Liu,Dazhong Zhong,Jinping Li,Qiang Zhao
The metallic Ni catalyst suffers from strong binding with the *CO intermediate, resulting in poisoning of the catalyst surface. It is feasible to facilitate the generation of CO by alleviating the binding strength of the *CO intermediate on the Ni metal surface through a lattice expansion strategy. Here, Ni 3 ZnC 0.7 @C with lattice expansion was synthesized by co-doping with Zn and interstitial C through high-temperature pyrolysis. Structural characterization confirms that the lattice of Ni 3 ZnC 0.7 expands by 5.47% compared to Ni due to the co-doping of Zn and interstitial C. The Ni 3 ZnC 0.7 @C possesses excellent catalytic performance with Faradaic efficiency (FE) of CO exceeding 90% over a wide potential range from −0.8 to −1.4 V versus reversible hydrogen electrode (vs. RHE) with a peak FE CO of 96.6% at −1.0 V vs. RHE. In membrane electrode assembly (MEA) testing, Ni 3 ZnC 0.7 @C achieves a FE CO of 81.4% at the industrial-level current density of 400 mA cm −2 . In situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) and density functional theory (DFT) calculations reveal that the co-introduction of Zn and interstitial C in the Ni crystal can significantly promote the desorption of *CO intermediate, which facilitates the generation of CO. This study demonstrates a viable way for designing efficient transition metal catalysts for CO 2 electroreduction through lattice strain engineering.
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RENEWABLE ENERGY
·
2025
·
IF 9.1
Hongming Liu,Junhao Cui,Zhiyang Zhao,Yongqi Ren,Bailong Chen,Longzhi Li
The traditional utilization of lignin mainly relies on direct combustion, which leads to low energy efficiency and environmental pollution, becoming a key bottleneck restricting the efficient utilization of all components of lignocellulose. This paper introduced a new strategy of microwave-assisted lignin hydrogenolysis over bifunctional catalyst Fe-Co/AC to achieve high-value conversion of lignin. This article firstly investigated the hydrogenolysis characteristics and product distribution patterns in the presence of Fe-Co/AC through catalyst characterization and adsorption calculation, as well as hydrogenolysis experiments. The results showed that the formation of Fe-Co alloy in the catalyst resulted in highly catalytic activity and selectivity for the hydrogenolysis process. Next, the intrinsic effects of solvent hydrogen donors and microwaves on lignin hydrogenolysis were discussed, through comparative experiments of hydrogenolysis in absence of catalyst and microwave-assisted pyrolysis. Lastly, attention was paid to calculate the adsorption characteristics and bond length changes of different substrates under metal components in order to reveal the mechanism of Fe-Co for synergistic catalyzing lignin hydrogenolysis, and to propose a potential pathway for lignin directed conversion into phenol. The findings provide a new approach for efficient bond breaking and intermediates hydrogenation of solid wastes such as lignin and plastics to obtain high value-added products.
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Processes
·
2025
·Vol. 13
·期 11
·3543
·
IF 2.8
Zhen Zhao,Meng Chen,Lei Wang
This study investigates the torrefaction of polyvinyl chloride (PVC) and cellulose, two major constituents of agricultural waste, with the aim of improving chlorine removal and enhancing the energy quality of the resulting solid products. Thermodynamic simulations using HSC Chemistry 9.0 were first conducted to predict equilibrium compositions, particularly chlorine-containing species. Thermogravimetric analysis (TGA) and coupled TGA-FTIR were employed to monitor mass loss and identify gaseous chlorine compounds. Based on these preliminary results, torrefaction experiments were carried out at temperatures of 250–300 °C and durations of 30–90 min. The results demonstrate a significant synergistic effect between cellulose and PVC during co-torrefaction, achieving 97% chlorine removal under optimal conditions (9:1 cellulose-to-PVC ratio, 250 °C, 30 min). This effective dechlorination helps mitigate Cl-induced corrosion and reduces the risk of dioxin formation in industrial applications, enabling the sustainable upcycling of PVC-contaminated biomass into clean solid fuels. Torrefaction temperature exerted a stronger influence than time on mass loss, yielding approximately 40% solid residue at 300 °C. While both solid and energy yields decreased with increasing temperature and time, the O/C and H/C atomic ratios decreased by 56% and 48%, respectively, indicating a substantial improvement in fuel properties. The observed synergy is attributed to cellulose-derived hydroxyl radicals promoting PVC dehydrochlorination. This process offers a scalable and economically viable pretreatment route for PVC-containing biomass, potentially reducing boiler corrosion and hazardous emissions.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhidan Zheng,Wenbiao Liu,Xudong Huang,Huatian Chen,Zhijie Ren,Chengwu Zou,Huihua Tan,Qian Sun,Shuangliang Zhao
Pesticides and fertilizers are typically used in traditional agriculture. However, their incompatibility often causes efficacy reduction and environmental risks. Herein, we propose a new strategy for preparing polydopamine (PDA) multi-compartment microcapsules. The PDA nanocapsules can be synthesized through emulsion polymerization, with spherical morphology and a particle size range of 30–100 nm, which are used as shell materials to fabricate PDA multi-compartment microcapsules via spray drying technology. The as-prepared spherical microcapsules obtain a particle size range of 0.8–3.0 μm and good dispersibility, and can separately encapsulate the oil-soluble avermectin (AVM) and water-soluble urea to form Urea@AVM@PDA. In addition, these microcapsules can achieve controlled release of AVM and urea under different temperatures, pH, and NIR conditions, with good adhesion ability. The Urea@AVM@PDA also exhibits a lower LC 50 (18.416 μg/mL) than avermectin emulsifiable concentrate (AVM-EC, 23.923 μg/mL), and causes 36.67 % higher mortality of Plutella xylostella after ultraviolet treatment, which confirms the ultraviolet resistance of PDA shell layers. Furthermore, the potting experiment proves the Urea@AVM@PDA can promote pumpkin seedling growth.
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ACS Catalysis
·
2025
·
IF 13.1
Guihua Yan,Paulina Pršlja,Gaofeng Chen,Jiahui Kang,Yongde Liu,Miguel A. Caro,Xi Chen,Xianhai Zeng,Bo Peng
Syngas conversion into higher alcohols represents a promising avenue for transforming coal or biomass into liquid fuels. However, the commercialization of this process has been hindered by the high cost, low activity, and inadequate C2+OH selectivity of the catalysts. Herein, we have developed Cu/Co carbon wood catalysts, offering a cost-effective and stable alternative with superior selectivity for catalytic conversion. The formation of Cu/Co nanoparticles was found, influenced by water-1,2-propylene glycol ratios in the solution, resulting in bidisperse nanoparticles. The Cu/Co-CW-W1P1 catalyst (the ratio between water and 1,2-propanediol is 0.5:0.5) exhibited a remarkable CO conversion rate of 74.8% and a selectivity of 58.7% for C2+OH, primarily comprising linear primary alcohols. This catalyst demonstrated enduring stability and selectivity under industrial conditions, maintaining its efficacy for up to 350 h of operation. We also employed density functional theory (DFT) to analyze selectivity, particularly focusing on the binding strength of CO, a crucial intermediate for subsequent reactions leading to the formation of alcohols. DFT identified the pathway of CHx and CO coupling, ultimately yielding C2H5OH. This computational understanding, coupled with the high performance of the Cu/Co-carbon wood catalyst, paves the way to develop catalytically selective materials tailored for higher alcohol production from a nature-based source.
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