WASTE MANAGEMENT
·
2026
·
IF 7.3
Tianhang Tang,Chenlu Yang,Huikang Song,Hao Liu,Hao Shi,Yaji Huang
A highly efficient and environmentally friendly plasma co-melting vitrification process was developed. • The mechanisms of heavy metal fixation and migration during the plasma melting process were investigated. • Changes in the valence states and forms of various elements during the melting process were studied. Hazardous fly ash (HFA) contains large amounts of toxic heavy metals and poses significant potential risks to the environment. In this study, HFA was co-melted with hazardous bottom ash (HBA) and waste glass (WG) in a plasma system to investigate its vitrification behavior, heavy metal migration, and solidification mechanisms. The results indicate high vitrification efficiency (99.5 %) and ash solidification rate (97.1 %). The original multi-phase crystalline structure transformed into a structure dominated by an amorphous silicate network following plasma melting and rapid cooling. The surface became smoother and denser, and heavy metals were distributed uniformly, indicating enhanced physical encapsulation capacity and a more homogeneous structure. Although a considerable amount of heavy metals remained in the melt product (GP), the leaching concentrations of all detected heavy metals were significantly reduced. BCR results further indicate improved long-term stability of heavy metals. Additionally, the solidification mechanism was elucidated, involving a synergistic process of glass network encapsulation, fixation in iron-rich crystalline phases, and volatilization-redistribution-residual stabilization. As, Pb, and Cu are primarily immobilized in the glass phase, while Cr and Ni are preferentially stabilized in iron-rich spinel/ferrite-like phases; Zn and Mn exhibit dual-host behavior between the glass and crystalline phases. The results demonstrate that plasma co-melting vitrification is an effective method for the detoxification, stabilization, and resource utilization of hazardous incineration residues.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Liangyu Zhai,Atawulla Nurmemet,Abdulla Eziz,Anwar Mamat,Abulikemu Abulizi,Hongyuan Zeng,Ailijiang Nuerla,Min Liu
A carbon-rich precursor was extracted from coal gangue by gradient purification. • Molten salt-assisted activation regulated pore structure and surface chemistry. • The optimized porous carbon exhibited high surface area and defect density. • High-capacity cationic dye adsorption was achieved by CGC-124. • DFT revealed enhanced binding by oxygen-containing functional groups. Coal gangue is a massive coal-based solid waste containing intrinsic carbonaceous matter that remains underutilized for the preparation of high-value functional carbon materials. Herein, coal gangue was converted into hierarchically porous carbon through gradient purification and molten salt-assisted KOH activation. Flotation followed by sequential HF/HCl leaching effectively removed mineral impurities and enriched the carbonaceous fraction. During activation, the NaCl/KCl molten salt medium promoted more uniform KOH etching and moderated excessive corrosion of the carbon framework, facilitating hierarchical pore development while retaining oxygen-containing surface functionalities. The optimized porous carbon, CGC-124, exhibited a specific surface area of 2964.39 m 2 /g, abundant defects, and surface hydroxyl/carboxyl groups. Using methylene blue (MB) as a representative cationic dye, CGC-124 achieved an adsorption uptake of 2798.48 mg/g at 318 K. Kinetic analysis was consistent with a surface-controlled process with chemisorption-like characteristics, whereas the better Freundlich fitting reflected the heterogeneous nature of the carbon surface. Experimental characterization and DFT calculations indicated that pore filling, electrostatic attraction, hydrogen bonding, π–π interactions, and interactions involving oxygen-containing groups jointly contributed to MB adsorption. This work provides a route for converting coal gangue into high-surface-area porous carbon and offers insight into molten salt-assisted pore engineering for cationic dye adsorption. Download: Download high-res image (160KB) Download: Download full-size image
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Small Methods
·
2026
·
IF 8.7
Huibin Guan,Li Zeng,Ziqin Wu,Weishan Tang,Xiaolong Li,Hanna He,Chuhong Zhang
Red phosphorus (P), with high theoretical specific capacity and environmental benignity, represents a promising anode material for lithium-ion batteries (LIBs). However, its practical application is hindered by intrinsic limitations, such as poor electronic conductivity and substantial volume fluctuation, resulting in sluggish redox reaction kinetics and compromised reaction reversibility. Herein, we design a 3D P-bonded radially-oriented Ti 3 C 2 microsphere composite electrode (P80/MS-Ti 3 C 2 ) via an innovative electrostatic spraying technique. The unique, highly conductive, radially-oriented Ti 3 C 2 matrix uniformly and tightly encapsulates P nanoparticles within the channels, which establish continuous ion/electron pathways and prevent the aggregation of 2D Ti 3 C 2 sheets. Simultaneously, the formation of robust Ti-O-P covalent bonds at the interface significantly enhances the intrinsic electronic conductivity and alleviates the volume expansion and exfoliation of red P during cycling. The synergistic integration of stabilized covalent interfaces and meticulously-engineered architecture endow the optimized P80/MS-Ti 3 C 2 electrode with high reversible specific capacities and outstanding cycling stability, achieving 1269.5 mAh g − 1 at 500 mA g − 1 after 700 cycles and 1064.3 mAh g − 1 at 1 A g − 1 after 1000 cycles even under a high P loading of 36.7%, with P approaching its theoretical capacity. This work provides an effective structural and interfacial engineering strategy to overcome the fundamental challenges of P-based electrodes, demonstrating great potential for high-performance LIBs.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Jiao Wang,Ran Yan,Junxiu Wang,Abdur Rashid
The migration and accumulation mechanisms of trace elements (As, Pb, Cr, Cu, Ni, Zn, Mn) from coal fly ash in soil-plant systems critically constrain its sustainable utilization. Through integrated approaches including sequential chemical extraction, leaching experiments, electron probe microanalysis, and meta-analysis of bioconcentration data, this study reveals ash-type-dependent element levels with migration capacity: Mn > As > Zn > Cu > Ni > Cr > Pb, governed by their chemical speciation and mineral associations. Elements were classified into three activity groups based on activity and effective mass percentages, aligned with RAC risk levels. Divergent risk evaluations emerged: Nemerow index and ecological risk index indicated moderate pollution (Pz = 2.76) and slight risk (RI = 64.25) based on total content, highlighting differing RAC evaluation outcomes considering speciation. Meta-analysis of a robust bias-tested dataset demonstrated ash generally elevates trace elements in rice but not corn/wheat, with root accumulation exceeding shoots and application rates > 10–20 % significantly increasing concentrations. Crucially, by comparison between predicted values from pollution indices that based speciation concentrations and empirically measured elemental bioconcentration data, residual fractions (F3/F4/F5) positively correlated with plant bioaccumulation, whereas bioavailable fractions (F1/F2) dominated ecological hazards. These findings provide: (1) a speciation-based framework for environmental risk assessment prioritizing F1/F2, and (2) phytoremediation strategies targeting F3/F4/F5, enabling balanced coal ash reuse and risk mitigation through differentiated management of chemical fractions.
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高影响因子
FUEL
·
2025
·
IF 7.5
Hao Li,Changge Shu,Guo Chen,Ruilian Hu,Erpan Qi,Yiyun Zeng,Siman Zhang,Kang Zhang,Kewen Tang,Kui Shen
Hollow-structured transition metal nitrogen-carbon (TM-N-C) materials synthesized from metal-organic frameworks (MOFs) have recently emerged as leading candidates in next-generation energy storage systems and conversion technologies. However, the controlled synthesis of hollow nanostructured TM–N–C materials, especially hollow nanoreactors with hierarchically porous shell, is rarely reported. Herein, we introduce a dual-template strategy where ZIF-8 crystals and SiO 2 serve as degradable and rigid templates within ZIF-67-based hybrid particles (ZIF-8@SiO 2 /ZIF-67). Pyrolysis-etching of these hybrid structures leads to the formation of Co/N-doped hollow nanocages with hierarchically porous shells (H-Co/NC-HS). Compared to ZIF-8@ZIF-67-derived samples, the H-Co/NC-HS structure offers a larger external surface area and greater exposure of active sites, which facilitate mass transfer and enhance ORR performance. The optimal H-Co/NC-HS(90) exhibits outstanding electrocatalytic activity, with a half-wave potential ( E 1/2 ) of 0.86 V vs. RHE, comparable to commercial Pt/C (20 wt% Pt). The material also shows excellent robustness, with E 1/2 and limiting current remaining stable after 1000 CV cycles, as well as superior methanol tolerance. This work pioneers a MOF/inorganic hybrid templating approach for hierarchical porous carbons and establishes a versatile platform for functional nanoreactor design.
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ACS Sustainable Chemistry & Engineering
·
2025
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IF 7.3
Shengqiang Zhou,Tianliang Lu,Lipeng Zhou,Xiaomei Yang
Glycerol, as the main byproduct in biodiesel production, is attractive for the synthesis of value-added chemicals with the rapid increase of the biodiesel market in recent years. In this study, we developed a bifunctional Au/Sn-Beta catalyst via a molecule linkage strategy for the one-pot catalytic conversion of glycerol to methyl lactate (MLA) with molecular oxygen as the oxidant. Bifunctional Au/Sn-Beta was constructed using β-mercaptoethylamine as a linkage molecule to anchor negative Au species on the negative surface of Sn-Beta zeolites. β-Mercaptoethylamine with a well-defined structure of head and tail functional groups was anchored on Sn-Beta zeolite through the interaction of amine groups with the framework Sn sites and weakly acidic silanols. Gold species with negative charge were captured by thiol groups of β-mercaptoethylamine anchored on Sn-Beta. Upon calcination, highly dispersed Au nanoparticles (∼2 nm) were confined in the crystal of Sn-Beta zeolite, which was proved by Tomogram-section TEM images. Linkage molecules with different structures were employed. The role of the linkage molecule was revealed by XPS, FTIR, and Raman spectroscopy. It was observed that electrons were transferred from Au sites to Sn sites, which facilitated the dispersion and stabilization of Au sites. A yield of 79.3% to MLA with 100% of glycerol conversion was achieved over the prepared Au/Sn-Beta at 160 °C for 1.5 h, which was much higher than that over Au/Sn-Beta prepared by the wet impregnation method. The positive charge on Au sites decreased the catalytic oxidation ability of the catalyst. The catalyst showed good catalytic activity and stability in ten batch reaction runs.
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高影响因子
Materials Today Bio
·
2025
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IF 10.2
Zhengchuan Zhang,Jiaqi Shen,Ruogu Xu,Yang Yang,Xiaolin Yu,Dongsheng Yu,Feilong Deng
Critical bone defect with soft tissue fenestration poses a significant therapeutic challenge without the premise of barrier periosteum in situ for the relatively independent repair spaces of soft tissue and bone. Inspired by the regenerative functions of mesenchymal stem cells (MSCs)-derived small extracellular vesicles (sEVs) and the guided properties of in situ-generated periosteum, here we report the therapeutic benefits of dual-functional biomimetic periosteum (DBP) incorporating engineered sEVs for treating critical bone defect with soft tissue fenestration. We started our experiment with the construction of engineered sEVs via porous titanium-preconditioned MSCs-derived sEVs (Ti-sEVs). COL1A1 and MMP1 were enriched in Ti-sEVs with enhanced uptake efficiency of fibroblasts and bone marrow-derived MSCs for scarless soft tissue and bone repair abilities via TGF-beta1/SMAD pathway in vitro. DPB was constructed via the chemically crosslinking and lyophilized treatment of a xenogenic acellular dermal matrix. Incorporation and in vivo delivery of Ti-sEVs were successfully achieved via the controlled-release DPB with the characteristics of a loose surface facing the bone defect and a dense surface facing the soft tissue fenestration. DBP incorporating Ti-sEVs promoted the repair of the surrounding native periosteum in situ via the critical skull defect with skin fenestration models in rats. Bone repair with scarless soft tissue was achieved by enhanced angiogenesis and limited osteoclastic activity. Collectively, this dual-functional system could synergistically achieve critical bone defect regeneration with scarless soft tissue repair via TGF-beta1/SMAD pathway with the sustained release of Ti-sEVs, providing a promising strategy of engineered sEVs for preferable tissue regeneration.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tianhang Tang,Yaji Huang,Huikang Song,Hao Liu,Hao Shi,Jun Zhang,Yizhuo Qiu,Lang Kai
Safe and efficient disposal of hazardous waste fly ash (HFA) has become a worldwide problem.Hazardous waste and furnace slag contain various heavy metals such as Mn, Cu, Zn, and Cr, posing significant threats to both the environment and human health.co-vitrification of fly ash and bottom slag has the advantages of low consumption and green, and has the potential for large-scale disposal of hazardous waste. On this basis, the co-vitrification of hazardous waste fly ash with bottom slag (HBA) was realised using waste glass (WG) as a flux. A new method for HFA/HBA co-vitrification was proposed. The effects of HFA/HBA ratios on glass conversion rate, heavy metal solidification, and melting mechanism were investigated. The results showed that at 1300°C, with the increase of HBA doping, Ca/Al was basically unchanged, SiO2 increased, and the glass conversion rate increased up to 98.71%. In addition, the effects of Fe, S, Cl and other elements content and valence changes on the glass melting and heavy metal solidification were investigated, and it was proved that Fe, S, Cl and other elements have different effects on the stabilisation of different heavy metals.The presence of iron in particular leads to the formation of spinel phases, which play a significant role in heavy metal immobilisation.By adjusting the HFA/HBA ratio, the overall solidification rate of raw ash can reach 94.6%,while ensuring a glass transition rate exceeding 85%, the HFA/HBA-WG system effectively cures a significant quantity of heavy metals. The HFA/HBA-WG system effectively cured a large amount of heavy metals, which provided a reference for the migration law of HFA/HBA-WG glass melting and heavy metal solidification.
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ACS Catalysis
·
2025
·
IF 13.1
Yuchen Zhang,Songpei Zhang,Yuxue Yue,Mingyi Xiao,Guangyu Cheng,Yilun Pan,Shitong Liu,Chunfa Li,Jia Zhao,Xiaonian Li
The Deacon process is important and highly desired for chlorine recycling in the chlor-alkali industry. Ru-based catalysts have always attracted much attention in the Deacon reaction; however, they are very easy to deactivate. One of the most advanced methods for adjusting the electrical and geometrical configurations of metal centers is lattice strain engineering, which plays a key role in controlling the interactions between adsorbate molecules and catalytic surfaces. In this study, a catalyst was developed via lattice matching between the active site and the support to enhance d-electron density near the Fermi level and strengthen metal–support interactions. The resulting catalyst achieves sustained chlorine production with a conversion rate of 90% and maintains stability for over 200 h during the Deacon process. This work presents a strategy to inhibit the aggregation of RuO2 and a fresh platform for designing highly stable catalysts.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiayuan Yang,Yingchun Liu,Wanchun Lin,Yage Zhou,Bo-Mei Liu,Wei Liu,Maoping Lyu,Jesse Zhu,Hui Zhang
Since environmental pollution and bacterial infections seriously threaten human health, considerable attention is devoted to designing antibacterial powder coatings. Silver nanoparticles (AgNPs) in the antibacterial coatings are recognized widely yet have not been well developed for powder coatings due to the size, carriers, dispersity and Ag + release of AgNPs. Herein, polyamide-based (PA) powder coating is prepared by microwave-driven spheroidization of PA particles and in-situ self-assembly of AgNPs based on polydopamine as active sites. PA particles with a sphericity of 0.93 show near perfect round morphology. It is conducive to decreasing the particle interactions, such as van der Waals and electrostatic forces, compared to irregular ones, thereby exhibiting superior flowability. Owing to AgNPs with a size of 75 ± 3 nm in coatings showed adaptable Ag + release rate, superior dispersity and interface compatibility. The coatings thus present durable antibacterial properties and wear resistance. Results demonstrated that the coatings containing 1.0 wt% AgNPs exhibited 99.99 % reduction for E. coli and S. aureus . Moreover, it is against presenting the same activity as the original coatings after 500 rub cycles or immersion for 7 days. Finally, as-prepared powder coating was used in door handles and wheelchair hand rims, proving its potential usefulness in public health devices.
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高影响因子
Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 47
·23612-23619
·
IF 5.1
Wenqiang Li,Qihao Li,Yuehua Chen,Cailing Liu,Wenjing Zhong,Xiang Zhang,Yayun Zhou,Tingting Deng,Jiantao Lü,Ting Fan
Near-infrared phosphor-converted light-emitting diodes (pc-LEDs), as the core light source for smart broadband near-infrared spectroscopy, face critical challenges in balancing luminous efficiency and thermal stability. Herein, we report a Cr3+-doped fluoride phosphor AlF3:Cr3+ with efficient broadband near-infrared (NIR) emission. Under blue-light excitation, AlF3:Cr3+ exhibits a broadband NIR emission centered at 749 nm with a full width at half maximum (FWHM) of 87 nm. Notably, it shows excellent thermal stability, retaining 86.28% of its room-temperature luminescence intensity at 423 K (150 °C). This superior anti-thermal quenching property is attributed to the weak electron–phonon coupling in its crystal structure, characterized by a low Huang–Rhys factor (S = 2.15). By integrating this phosphor with a blue LED chip, we fabricated a NIR pc-LED device with a photoelectric conversion efficiency of 2.2%@20 mA. The device would demonstrate significant advantages in diverse fields, including nondestructive testing, biomedical imaging, and intelligent security, highlighting the great potential of AlF3:Cr3+ for industrial applications.
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高影响因子
Communications Materials
·
2025
·Vol. 6
·期 1
·1-8
·
IF 9.6
Lin Qicai,Jin Junjie,Jiang Yongkang,Sheng Guan,Schwingenschlögl Udo,Wu Junwei,Tu Shaobo,Liu Xingjun,Zhang Xixiang
Al-ion batteries (AIBs) have emerged as a promising energy storage technology due to their high theoretical capacity, cost-effectiveness, and superior safety. However, the lack of stable and efficient cathode materials capable of reversible Al-complex ion (e.g., [AlCl 4 ] − ) insertion/extraction remains a critical challenge. In this work, we developed TiNbCT x MXene as a high-performance cathode material for AIBs, achieving remarkable capacity and cycling stability. Unlike symmetric-structured Ti 2 CT x , the TiNbCT x cathode leverages synergistic Ti–Nb bimetallic effects to enhance the electronic conductivity and electrochemical activity. Here we show, TiNbCT x delivers a high reversible capacity of 194 mAh·g −1 at 0.2 A·g −1 with 800-cycle stability. Through combined experimental characterization and density functional theory (DFT) calculations, we elucidate the kinetic mechanisms of energy storage, offering fundamental insights for the rational design of advanced cathode materials in AIBs.
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