WATER RESEARCH
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2025
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IF 12.4
Cong Zhang,Zhipeng Zhang,Shuang Zhang,Yifeng Chen,Dunjie Li,Yongmei Li
Anaerobic co-digestion of sulfur-containing organic wastes with waste-activated sludge containing iron–phosphorus compounds (FePs) was recently suggested as an environment-friendly strategy to promote phosphate release, energy recovery, and hydrogen sulfide (H 2 S) control. Nevertheless, the mechanistic coupling between FePs speciation and the concurrent transformation of carbon, sulfur, iron, and phosphorus within this system remains to be fully elucidated. To address this knowledge gap, methionine, a typical hydrolysis product of sulfur-containing organics, and five FePs prevalent in sludge (ferric-phosphate tetrahydrate (FePO 4 ⋅4H 2 O), ferric-phosphate dihydrate (FePO 4 ⋅2H 2 O), vivianite (Fe 3 (PO 4 ) 2 ·8H 2 O), phosphate coprecipitated with Fe(III) (COP-P), and phosphate adsorption on hydrous ferric oxide (HFO-P)) were selected to elucidate C-S-Fe-P transformations in this study. The results showed that the H 2 S and methyl mercaptan productions decreased by >96% and >99%, respectively, while the methane production rate increased by 51.60–103.9% in the presence of FePs. The reaction between FePs and sulfide promoted the transformation of gaseous H 2 S and aqueous S 2− to solid sulfur species (elemental sulfur and iron sulfide precipitates), while simultaneously promoting the release of PO 4 3− from FePs. The formation of Fe(II) species derived from both abiotic sulfide-driven reduction and microbial-mediated iron reduction processes. The reduction rates of FePO 4 ⋅2H 2 O and FePO 4 ⋅4H 2 O were higher than those of COP-P and HFO-P, owing to their higher thermodynamic favorability. A negative correlation was observed between the Fe/P molar ratio and PO 4 3− release efficiency. FePO 4 (FePO 4 ⋅2H 2 O and FePO 4 ⋅4H 2 O) with the lowest Fe/P molar ratio achieved the highest P release efficiency (89.83–91.01%). Metagenomics analysis revealed that the SELENBP1 gene related to the degradation of methanethiol to sulfide was upregulated by 21.12–51.72% in the presence of FePs, and the genes involved in propionate metabolism, methylotrophic, and hydrogenotrophic methanogenesis were up-regulated concurrently. This study provides an in-depth understanding of C-S-Fe-P interactions and transformations during the anaerobic co-digestion of sulfur-containing organic wastes with FePs-containing sludge, helping to enhance methane production and the recovery of phosphorus and sulfur.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Hongyu Wang,Tao Wang,Gonghao Li,Bo Wu,Ruijun Gao
Balancing increased recoverable strain with high phase transformation temperature is crucial for Cu-Al-Mn SMAs to cost-effectively overcome the service temperature limitation (<100°C) of NiTi-based SMAs. This study fabricated four types of Cu-12.5Al-3Mn SMAs modified with nano-Al₂O₃ p (0, 0.5, 1.0, and 1.5 wt%) using wire arc additive manufacturing (WAAM) with cored wires. It investigated the effects of nano-Al₂O₃ p on shape memory properties, exploring mechanisms via microstructural, phase, and hardness analysis. Results show that adding an appropriate amount of nano-Al₂O₃ p significantly enhances memory performance while maintaining high martensite transformation temperatures. The 0.5 wt% nano-Al₂O₃ p modified alloy exhibited optimal properties: a shape recovery rate of 87.77 % (13.8 % higher than the base alloy) and a recoverable strain of 7.02 % (>40 % higher than the commonly reported 5 %) under 8 % bending pre-strain. Its Ms temperature remained above 100°C (As, Af, Mf were largely unchanged), and full recovery time was halved compared to the unmodified alloy. The enhancement is attributed to nano-Al₂O₃ p strengthening the parent phase and improving thermoelastic martensite order via pinning. Their high stability under WAAM's high-energy heat source minimizes impact on alloy composition, while dispersed particles create lattice distortion and stress fields, reducing the energy barrier for martensitic transformation.
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Journal of Bioresources and Bioproducts
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2025
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IF 13
Fengfan Zhu,Huanhui Zhan,Chenfei Wang,Bo Fu,Jiancheng Zhou
In response to the growing demand for sustainable thermal management solutions, this study developed an eco-friendly flame-retardant aerogel through a green manufacturing process that incorporates bio-derived phosphorylated chitosan (PCS) into a sodium alginate (SA) matrix. The strategic incorporation of PCS, synthesized from renewable chitin resources, significantly enhanced the interfacial compatibility and thermal stability of the composite material while introducing a phosphorus-nitrogen synergistic flame-retardant mechanism. Systematic characterization revealed that the sodium alginate mixed with 30% that mass of phosphorylated chitosan (SA-30 PCS) exhibits exceptional fire safety performance, achieving a limiting oxygen index (LOI) of 33.7% and a V-0 rating in the vertical burning test (Underwriters Laboratories Standard 94), which indicates the highest level of flame resistance. Additionally, this formulation shows a 45% reduction in total heat release compared to pristine SA aerogels. The composite maintains low thermal conductivity (0.035 0 W/(m·K)), fulfilling dual requirements for high-temperature insulation and fire protection. A sustainable hydrophobic modification strategy employing methyltrichlorosilane vapor deposition further endowed the aerogel with moisture resistance. As a wholly biomass-derived system (SA/PCS), the aerogel eliminates persistent toxic residues associated with halogenated flame retardants, while its phosphorus components are covalently bonded in polymeric chains, significantly reducing environmental mobility compared to inorganic phosphates. The inherent biopolymer composition enables potential end-of-life management via enzymatic digestion (e.g., chitinase/alginate lyase), positioning it as an eco-design alternative for sustainable insulation.
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Materials Today
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2025
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IF 22
Hang Yue,Sichen Huo,Xinyu Wang,Mingyi Wang,Heyuan Sun,Yanjie Chen,Ying Dai,Mingyang Liu,Jinlong Zou
Due to restrictive linear relationship between intermediates in adsorption evolution mechanism (AEM) of oxygen evolution reaction (OER), a higher overpotential must be overcome for conversion of *O to *OOH. Activating lattice oxygen mechanism (LOM) can address the AEM’s challenges by facilitating O-O coupling. However, via LOM pathway, extracting electrons from metal-oxygen (M−O) bonds usually results in structural instability. Herein, we propose an effective method to stabilize LOM-catalysts by combining cerium dioxide with cobalt phosphide (CeO 2 /CoP heterostructure). CeO 2 acts as an electron buffer to retain/provide electrons at different stages, while CoP with strong Co-P covalency enhances structural/catalytic stability in strongly-alkaline conditions. CeO 2 /CoP exhibits an OER overpotential of only 225 mV at 10 mA cm −2 . Initially, CeO 2 acquires electrons from CoP to accelerate surface reconstruction and form high-valence Co δ+ (CoOOH). Then, CoOOH acquires electrons from the 4 f -orbital of Ce through the Ce-O-Co interface, rather than from the M−O bond, thus ensuring OER stability. For water splitting, bifunctional CeO 2 /CoP-assembled electrolyzer requires a cell-voltage of only 1.54 V to achieve 10 mA cm −2 and retains 89.5 % of its activity after 72 h of cycling. It highlights that leveraging electron-buffering metal species can enhance the LOM stability, thereby enabling its application in bifunctional electrocatalysis.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Xuxu Wang,Wenbo Wang,Jinhui Li,Shuang Gao,Ping Nie,Fen Yao,Limin Chang
Transition metal phosphides (TMPs) are ideal anodes for lithium-ion batteries (LIBs) due to their high theoretical specific capacity and suitable lithiation potential. However, transition metal phosphides suffer from the shortcomings of large volume change and low electrical conductivity, resulting in poor rate performance and short cycle life. In this paper, nanofibers consisting of amorphous FeP x nanoparticles and N, P-codoped carbon substrate are synthesized by electrospinning and in-situ phosphidation to address these challenges. The amorphous structure with no grain boundary and isotropy can provide more Li + transport channels and Li + storage sites. Moreover, the N, P-codoped carbon substrate can effectively improve the electronic conductivity of the electrodes and the structural robustness of the nanofibers. Due to the unique structure and composition, the FeP x /C nanofibers exhibit excellent electrochemical performance when used as anodes for LIBs (stable cycling over 2200 cycles at 1 A g −1 ). It is suggested that the large pseudo-capacitance and fast Li + diffusion resulting from the amorphous structure are important reasons for the excellent electrochemical performance of FeP x /C nanofibers. This work provides a new idea to optimize the electrochemical performance of TMPs, which is expected to be used in other conversion anode materials.
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ANALYTICAL SCIENCES
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2015
·Vol. 31
·期 7
·669-675
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IF 1.394
Yan Kai,Zhu Yuhan,Cheng Ling,Zhang Jingdong
A novel photoelectrochemical strategy for the sensitive determination of p-nitrophenol (PNP) was developed using a glassy carbon electrode (GCE) modified with CdSe quantum dots (QDs) and DNA composite film (CdSe-DNA/GCE). Various surface analytical techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), were employed to characterize the synthesized CdSe QDs and CdSe-DNA modified electrode. The interfacial behaviors of the modified electrodes were analyzed by electrochemical impedance spectroscopy (EIS), and the interaction between PNP and DNA was studied by UV-visible spectrometry. Due to the PNP-DNA interaction, CdSe-DNA/GCE exhibited a sensitive photocurrent response toward PNP under visible-light irradiation. The influencing factors, such as the concentration of DNA used for fabricating CdSe-DNA/GCE and the bias potential applied in the photoelectrochemical measurement, were investigated. Under the optimized conditions, the photocurrent on CdSe- DNA/GCE was linearly increased with the PNP concentration from 0.7 to 50 μmol L −1 , with a detection limit (3 S/N ) of 0.27 μmol L −1 . The proposed photoelectrochemical strategy was successfully applied to monitoring the degradation of PNP.
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POLYMER
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2025
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IF 4.5
Zi’ang Yu,Gaoyun Qi,Zhenyu Jiang,Zhonglin Luo,Biaobing Wang
In this paper, a P/N/S multi-element flame retardant (TATP) was synthesized by 5-amino-1H-tetrazole, 2-thenaldehyde and DOPO. When TATP content reaches 4 wt%, EP/TATP-4 exhibits 38.1 % of LOI value and UL-94 V-0 rating. Compared to the pure EP, the peak of heat release rate, the total heat release and the total smoke production in cone calorimeter test are dropped by 30.8% and 32.4%, and 51.6% respectively. Moreover, the char residue is dramatically increased by 74.0%. Detailed analysis indicates, the tetrazole group decomposes from TATP firstly, which promotes the cleavage of thiophene ring below 380 o C, much lower than experimentally reported degradation temperature of thiophene compounds. Therefore, besides the emission of enough nonflammable gases, the high-energy density characteristics of the tetrazole ring is also benefited to the thermal decomposition of TATP and make the tetrazole, thiophene and DOPO groups play synergistic impacts on fire safety for epoxy resin. Furthermore, the P/N/S elements are found exerting flame retardant effects both in the gas and condensed phases. The obtained EP/TATP-4 maintains the comparable tensile and flexural properties to pure EP. Remarkably, EP/TATP-4 has high transparency and exhibits excellent UV shielding performance for UVA wavelengths, and has an extraordinarily higher Ultraviolet Protection Factor value of 1983.2.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Hongyuan Zhao,Mengyuan Zhao,Zetan Zhang,Xinya Xu,Wenwen Cao,Zirong Li
A novel niclosamide (NA) electrochemical sensor was constructed by modifying glassy carbon electrode (GCE) with chitosan (CTS)-encapsulated and Super P Li carbon black (Super P)-embedded whisker carbon nanotubes (w-CNTs) networks. The incorporation of w-CNTs and Super P formed an integrated carbon-based conductive networks that dramatically boosted the conductivity property. Moreover, CTS prevented the agglomeration of carbon materials and anchored zero-dimensional Super P and one-dimensional w-CNTs, constructing the “point-to-line” conductive carbon networks. The good film-forming ability of CTS enhanced the stability of the fabricated sensor. By harnessing the synergistic interplay of CTS/Super P/w-CNTs, the CTS/Super P/w-CNTs/GCE sensor achieved the remarkably sensitive NA detection (LOD: 10.5 nM) within an acceptable NA concentration range (0.01–25 μM). For the practical application of NA detection in water samples, the designed sensor exhibited outstanding reliability, as confirmed by relative standard deviations (RSD) ranging from 1.07 % to 3.48 %, and recovery rates ranging from 97.30 % to 102.80 %.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Chuanjin Lin,Guoquan Suo,Jiarong Li,Rongrong Mu,Laraib Habib,Xiaojiang Hou,Xiaohui Ye,Yanling Yang
The development of high-performance anode materials remains a critical challenge for advancing aqueous zinc-ion batteries (AZIBs). While conversion-type CuS anodes demonstrate superior capacity through multi-electron redox reactions, they are hindered by sluggish Zn 2+ kinetics and structural degradation. Herein, we propose a porous P-doped CuS/carbon nanotube composite (P-CuS/CNTs) engineered through a one-step hydrothermal strategy to address these limitations. The dual-functional design combines atomic-scale phosphorus doping with three-dimensional CNTs scaffolding, creating synergistic effects including: facilitating partial Zn 2+ desolvation via P C bond formation; establishing rapid ion/electron transport pathways and buffering volume changes through mechanical reinforcement of CNTs. The optimized P-CuS/CNTs anode delivers exceptional electrochemical performance, achieving a high specific capacity of 258 mAh g −1 at 1 A g −1 and retaining 128 mAh g −1 after 1000 cycles at 10 A g −1 with 98.2 % capacity retention. When paired with MnO 2 @CNTs cathodes, the full cell maintains 74 mAh g −1 after 170 cycles. This work provides fundamental insights into the desolvation-enhanced conversion mechanism while demonstrating a viable material design strategy for stable Zn-ion storage systems.
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Han Wang,Xiaolong Tian,Xiaoyi Liu,Jian Cui,Ailin Gao,Yehai Yan
Membrane distillation (MD) technology is crucial for achieving zero discharge of hypersaline wastewater. However, its practical application has been hindered by low permeation flux. This study presents a hydrogel-coated Janus membrane (JM), developed through controlled interfacial free radical polymerization (IFRP) on a self-fabricated hydrophobic polyvinylidene fluoride (PVDF) substrate under ultraviolet irradiation. Microscopic images show that the in-situ synthesized hydrogel infiltrated into the nanoscale pores of the PVDF substrate, forming a stable "physical interlocking" composite structure with an impressive hydrophilic modification depth of 42 μm. MD performance results indicate that the optimized M-P2H4 JMs achieve remarkable water vapor flux of 42.14 L m -2 h -1 , while maintaining stable flux and salt retention across various salt concentrations (3.5wt%-20wt%). Molecular dynamics simulations reveal a strong interaction energy between the synthesized hydrogel layer and water molecules. Dark evaporation tests, differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA) analysis show that the hydrogel networks increase intermediate water proportion and remarkably reduce evaporation enthalpy. Higher specific surface area is measured for the microsphere-based PVDF membrane, thereby increasing the evaporation area. The combination of the reduced evaporation energy barrier and increased evaporation area of M-P2H4 result in its excellent evaporation efficiency, which also presents excellent resistance to surfactant-stabilized oil-in-water brine emulsions. This study offers valuable insights into designing JM with high flux capability and superior anti-fouling properties.
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ChemistryOpen
·
2025
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IF 3.1
Chenyun Zhang,Jiahao Wang
Graphical A deep eutectic solvent (DES) prepared by mixing tetraalkylphosphonium chloride ([ P4444 ]Cl) and glycerol is applied in the synthesis of P-doped Ni materials. The DES not only serves as the reaction medium but also participates in the catalyst preparation. The synthesized P-doped Ni catalyst exhibits excellent performance in HER in both acidic and alkaline environments. A deep eutectic solvent (DES) was prepared by mixing tetraalkylphosphonium chloride ([P 4444 ]Cl) and glycerol in a 1:2 molar ratio. Nickel nitrate was dissolved in this DES, and then the mixture was heated at 350 °C to obtain phosphorus-doped nickel catalysts. In this system, the DES plays multiple crucial roles. (1) It serves as a reaction medium, providing a suitable solvent environment for the synthesis of Ni-based catalysts. (2) It actively participates in the catalyst preparation as a reactant. [P 4444 ]Cl acts as a P source, while glycerol effectively promotes the formation of nickel metal as a reducing agent. (3) It exhibits a templating effect, inducing the morphology of product to be a unique thin sheet with angular edges. The synthesized P-doped Ni material exhibits excellent hydrogen evolution performance in water splitting. In an acidic environment, when the current densities reached 10 and 20 mA cm −2 , the overpotentials were only 90.2 and 115.9 mV, with a Tafel slope as low as 55.6 mV dec −1 . In an alkaline environment, the P-doped Ni also performed well. The η 10 and η 20 values were 107.0 and 145.4 mV, respectively. The Tafel slope was 57.0 mV dec −1 .
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BIOMATERIALS
·
2021
·
IF 12.479
Xianzhen Dong,Ping Wu,Lesan Yan,Kun Liu,Wenying Wei,Qiang Cheng,Xinyue Liang,Yun Chen,Honglian Dai
Delayed injured nerve regeneration remains a clinical problem, partly ascribing to the lack of regulation of regenerative microenvironment , topographical cues, and blood nourishment. Functional electrospun conduits have been established as an efficacious strategy to facilitate nerve regeneration by providing structural guidance, regulating the regenerative immune microenvironment, and improving vascular regeneration. However, the synthetic polymers conventionally used to fabricate electrospinning scaffolds, such as poly(L-lactic acid), poly(glycolic acid), and poly(lactic-co-glycolic acid), can cause aseptic inflammation due to acidic degradation products . Therefore, a poly[3(S)-methyl-morpholine-2,5-dione- co -lactic] [P(MMD- co -LA)] containing alanine units with good mechanical properties and reduced acid degradation products, was obtained by melt ring-opening polymerization (ROP). Here, we aimed to explore the effect of oriented nanofiber/Deferoxamine (DFO, a hydrophilic angiogenic drug) scaffold in the rapid construction of a favorable regenerative microenvironment, including cell bridge, polarized vascular system, and immune microenvironment. In vitro studies have shown that the scaffold can sustainably release DFO, which accelerates the migration and tube formation of human umbilical vein endothelial cells (HUVECs), as well as the expression of genes related to angiogenesis . The physical clues provided by the arranged nanofibers can regulate the polarization of macrophages and reduce the expression of inflammatory factors. Furthermore, the in vivo results demonstrated a higher M2 polarization level of the oriented nanofibrous scaffold treatment group with reducedinflammation reaction in the injured nerve. Moreover, the in-situ release of DFO up-regulated the expression of HIF1-α and SDF-1α genes, as well as the expression of HIF1-α′s target gene VEGF, further promoting revascularization and enhancing nerve regeneration at the defect site . The obtained results provide essential insights on accelerating the creation of the nerve regeneration microenvironment by combining the physiological processes of nerve regeneration with topographical cues and chemical signal induction.
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