查找使用阿拉丁产品的科研文献

Insights into the Structural Evolution and Heavy Metal Immobilization in a CaO–Fe₂O₃–SiO₂ System during Multi-Source Solid Waste Co-Vitrification: Integrated Experimental and Theoretical Study

Hao Liu,Yaji Huang,Huikang Song,Tianhang Tang,Hao Shi,Lang Kai,Chenlu Yang

A novel pathway for the co-disposal of municipal solid waste incineration fly ash (MFA) and bottom slag (BS) with waste glass (WG) was proposed. Combined melting experiments and theoretical calculation were employed, which revealed the structural evolution of the CaO-Fe₂O₃-SiO₂ system and the underlying mechanisms of heavy metal immobilization. It was demonstrated that stable glassy products were obtained within a CaO/(Fe₂O₃+SiO₂) mass ratio ( M C / ( SF ) $M_{C/(\mathit{SF})}$ ) range of 0.13~0.41. The leaching concentrations of heavy metals in these vitrified products were suppressed to the relevant regulatory standards. With an increasing M C / ( SF ) $M_{C/(\mathit{SF})}$ , the glass network became more depolymerized, as evidenced by a higher population of low-connectivity Qⁿ units in the structure. However, under Fe₂O₃-enriched system, the Fe coordination shifted from solely tetrahedral [FeO₄] towards a mixed tetrahedral/octahedral environment. Moreover, Pb and Cd were incorporated into the glass matrix via interstitial doping. The depolymerized network dominated by CaO favored the Pb enrichment. Cd tended to be stabilized in the Fe-rich structure, facilitated by the formation of highly localized Cd-O bonds. This study elucidated the coupling effects of oxide composition on glass structure and heavy metal immobilization behavior, providing a fundamental theoretical basis for understanding and optimizing the vitrification process for solid waste treatment.

Defect Engineering of a d-p Orbital Hybridized Osmium/o-CNTs Heteroelectrocatalyst with an Optimized Interfacial Water Structure for Hydrogen Evolution within an Al | OH– | H2 Primary Cell

Lin Wei,Yang Zhibin,Tao Jin-Gang-Lu,Zhao Qianqian,Liu Fuyu,Li Wanshan,Feng Renfei,Zhang Yu,Fu Xian-Zhu,Luo Jing-Li,Zhao Bin

Developing efficient and durable electrocatalysts for alkaline seawater hydrogen evolution remains challenging because of sluggish water dissociation kinetics. Herein, we report a defect-rich d-p orbital-hybridized Os/o-CNTs electrocatalyst ( dph -Os def /o-CNTs) prepared by rapid room-temperature NaBH 4 reduction. The partially oxidized CNT support anchors defective Os nanoclusters and induces C–Os/C–O–Os electronic coupling, generating electron-deficient Os sites with modulated 5d electronic structures. In alkaline simulated seawater (1 M NaOH + 3.5 wt % NaCl), dph -Os def /o-CNTs requires only 91 mV to reach 100 mA cm –2 and exhibits a Tafel slope of 19 mV dec –1 , with stable operation over 350 h and 10,000 CV cycles. In situ Raman spectroscopy, AIMD simulations, and DFT calculations reveal that Os vacancies reorganize interfacial water into an ordered H-bond network, promote O-down water adsorption, and reduce the water dissociation barrier from 1.12 to 0.56 eV. Moreover, an Al | OH – | H 2 primary cell using dph -Os def /o-CNTs as the cathode delivers 1.41 V and 10.92 mW cm –2 , enabling simultaneous hydrogen generation and electricity output.

Light-induced H₂O₂ self-supply enables FeII/FeIII cycle in MIL-100(Fe)/Zn₃in₂S₆ heterojunction for dark-light dual mode reactive oxygen species-mediated sterilization

Siqi Liu,Shanshan Cheng,Zhimeng Liu,Miaomiao Zheng,Hongyuan Wang,Supakorn Boonyuen,Hongyi Gao,Ge Wang

Reactive oxygen species (ROS)-mediated sterilization typically relies on continuous light irradiation or exogenous H 2 O 2 addition, limiting their practical utility under dark or resource-limited conditions. Herein, we rationally design an S-scheme MIL-100(Fe)/Zn 3 In 2 S 6 heterojunction (M 5 Z 1 –1@ZIS2) by in-situ growing Zn-doped MIL-100(Fe) on Zn 3 In 2 S 6 , achieving synergistic light-harvesting and ROS self-supply capabilities. The incorporation of Zn 3 In 2 S 6 enhances electron density around Fe 2+ sites while modulating Fe 3+ states, significantly improving O₂ activation and H 2 O 2 affinity. This unique electronic regulation enables the heterojunction to generate superoxide radical(·O₂ − )-dominated ROS even in the dark. Notably, visible-light pretreatment induces active In sites in Zn 3 In 2 S 6 to produce H 2 O 2 , which accumulates and sustains the FeII/FeIII redox cycle in the absence of light, driving continuous hydroxyl radical(·OH)-dominated ROS generation. Combined characterizations including X-ray photoelectron spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR) confirm H₂O₂-mediated Fe 2+ regeneration and ROS persistence. The M 5 Z 1 –1@ZIS2 heterojunction exhibits exceptional antibacterial performance, achieving ≥99.9% inactivation of Escherichia coli ( E. coli ) within 1.5 h in the dark and 40 min under visible light. This work provides a strategy for designing self-sustaining catalytic systems that leverage light-driven H₂O₂ supply to enable day-night ROS functionality. Furthermore, M 5 Z 1 –1@ZIS2 loaded on polyvinylidene fluoride (PVDF) film can achieve an efficiency of over 99% for particulate matter (PM) pollutants at the wind speeds of 1.5 m/s and 0.5 m/s and reach a maximum adsorption efficiency of 99.5% for formaldehyde within 19 min, highlighting its potential for all-weather air purification via ROS-mediated environmental remediation.

High efficient activation of peroxymonosulfate by Co9S8 anchored in N, S, O co-doped carbon composite for degradation of sulfamethoxazole: Effect of sulfur precursor and sulfur doping content

Shizong Wang,Jianlong Wang

Cobalt sulfides as persulfate activator have received increasing interest in the field of persulfate-based advanced oxidation process. In this study, Co 9 S 8 anchored in N, S, O heteroatoms co-doped carbon (CoSx@N-S-O-C) composite was prepared with different sulfur precursors (sulfur, thiourea, thiophene and benzyl disulfide), and used to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) degradation. The effect of temperature, pH, inorganic ions, humic acids and water components on SMX degradation was investigated. The results showed that sulfur precursor could regulate the catalytic activity of the composite through changing the cobalt speciation and carbon structure. The catalytic activity was highest when the molar ratio of sulfur to cobalt was 5:1 (CoS x @N-S-O-C-5). Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. The intermediate products during SMX degradation were identified, and the possible pathway of SMX degradation was proposed. Pyridinic N, Co-N, cobalt, S 2− , S 2 2− , C-S-C and C-SO x were active sites for PMS activation.

Synergistic effect of oxygen defect and doping engineering on S-scheme O-ZnIn2S4/TiO2-x heterojunction for effective photocatalytic hydrogen production by water reduction coupled with oxidative dehydrogenation

Jiaqing Liu,Jun Wan,Lin Liu,Weijie Yang,Jingxiang Low,Xiaoming Gao,Feng Fu

Aiming to the unwanted photocatalytic hydrogen production systems using sacrifice agents, a well-design S-scheme O-ZnIn 2 S 4 /TiO 2- x heterojunction was fabricated to realize photocatalytic hydrogen production via water reduction coupled with organic oxidative dehydrogenation. As supported by DFT calculations and experimental analysis, owing to the synergistic effect of oxygen defect and doping engineering, a tailored energy band structure alignment with higher redox potentials and larger Fermi level potential difference are achieved, resulting in more efficient S-scheme interface charge transfer and separation efficiency, thus improving the photocatalytic activity of O-ZnIn 2 S 4 /TiO 2- x . The optimal O-ZnIn 2 S 4 /TiO 2- x photocatalyst shows remarkable H 2 and benzaldehyde production rate of 2584.9 μmol g -1 h −1 and 2880.5 μmol g -1 h −1 under visible light, which are 52.5 and 66.4 times as high as those over blank TiO 2 . Interestingly, this coupled reaction system also displays superior H 2 evolution activity compared to sacrificial reagent systems of Na 2 SO 3 /Na 2 S and triethanolamine. Further quenching and EPR experiments reveal that both water and organic molecules provide protons for H 2 production.

Metabolism and disposition of corylifol A from Psoralea corylifolia: metabolite mapping, isozyme contribution, species differences and identification of efflux transporters for corylifol A-O-glucuronide in HeLa1A1 cells

Yang Li,Jinjin Xu,Chunxia Xu,Zifei Qin,Shishi Li,Liufang Hu,Zhihong Yao,Frank J. Gonzalez,Xinsheng Yao

Corylifol A (CA), a phenolic compound from Psoralea corylifolia, possessed several biological properties but poor bioavailability. Here we aimed to investigate the roles of cytochromes P450s (CYPs), UDP-glucuronosyltransferases (UGTs) and efflux transporters in metabolism and disposition of CA.Metabolism of CA was evaluated in HLM, expressed CYPs and UGTs. Chemical inhibitors and shRNA-mediated gene silencing of multidrug resistance-associated proteins (MRPs) and breast cancer resistance protein (BCRP) were performed to assess the roles of transporters in CA disposition.Three oxidated metabolites (M1–M3) and two glucuronides (M4–M5) were detected. The intrinsic clearances (CLint) values of M1 and M4 in HLM were 48.10 and 184.03 μL/min/mg, respectively. Additionally, CYP1A1, 2C8 and 2C19 were identified as main contributors with CLint values of 13.01–49.36 μL/min/mg, while UGT1A1, 1A7, 1A8 and 1A9 were with CLint values ranging from 85.01 to 284.07 μL/min/mg. Furthermore, activity correlation analysis proved CYP2C8, UGT1A1 and 1A9 were the main active hepatic isozymes. Besides, rats and monkeys were appropriate model animals. Moreover, dipyridamole and MK571 both could significantly inhibit M4 efflux. Gene silencing results also indicated MRP4 and BCRP were major contributors in HeLa1A1 cells.Taken together, CYPs, UGTs, MRP4 and BCRP were important determinants of CA pharmacokinetics.

Dual Functions of O-Atoms in the g-C3N4/BO0.2N0.8 Interface: Oriented Charge Flow In-Plane and Separation within the Interface To Collectively Promote Photocatalytic Molecular Oxygen Activation

Yuehan Cao,Ruiyang Zhang,Qian Zheng,Wen Cui,Yang Liu,Kaibo Zheng,Fan Dong,Ying Zhou

The photocatalytic performance of two-dimensional materials is largely limited by the fast recombination of photogenerated charges. Herein, we design and fabricate a novel g-C3N4/BO0.2N0.8 van der Waals heterostructure to realize oriented charge flow in-plane and separation within the interface. On one hand, a B–C bond forms within the g-C3N4/BO0.2N0.8 interface after the introduction of O atoms. The B–C bond as the mediator bridges g-C3N4 and BO0.2N0.8 sides to enhance the effective separation of photogenerated charges. On the other hand, the existence of O atoms promotes the formation of a B–O–O–B intermediate to realize that molecular oxygen can directionally obtain electrons from the surface to generate •O2–. As a result, BO0.2N0.8 instead of g-C3N4 is considered to be the main reaction side, and the energy barrier of NO3– generation is significantly decreased. The NO removal performance of g-C3N4/BO0.2N0.8 is enhanced and the NO2 generation is effectively controlled compared with that of g-C3N and g-C3N4/BN. This work could provide an effective and facile strategy to tune oriented charge transfer.

A Comparative Study of Gas-phase Fluorination and Nano-Al2O3 Doping on Space Charge Behavior and Trap Level in Epoxy Resin

Zijia Shen,Feipeng Wang,Muhammad Zeeshan Khan,Zhengyong Huang,Li He,Yushuang He,Jian Li

Silkworm cocoon derived N, O-codoped hierarchical porous carbon with ultrahigh specific surface area for efficient capture of methylene blue with exceptionally high uptake: kinetics, isotherm, and thermodynamics

Genxing Zhu,Qi Liu,Fengyi Cao,Qi Qin,Mingli Jiao

Dyes are typical water contaminants that seriously affect water quality. In this study, silkworm cocoon derived N, O-codoped hierarchical porous carbon was successively developed via a facile pre-carbonization and chemical activation method, and characterized thoroughly by SEM, TEM, HRTEM, XRD, Raman, N2 adsorption and XPS. The as-prepared N, O-HPC showed a well-developed porous structure with an ultra-high specific surface area of 2270.19 m2 g−1, which proved to be a high-efficiency adsorbent. Batch adsorption experiments demonstrated that MB adsorption was highly dependent on contact time, initial MB concentration, temperature and initial solution pH. However, no remarkable effects of humic acid and ionic strength were observed. In the kinetic studies, the good applicability of a pseudo-second-order kinetic model was demonstrated. The adsorption isotherm study showed that a Langmuir isotherm model can describe the experimental data much more suitably with a maximum monolayer adsorption capacity value of 2104.29 mg g−1, which is among the highest in previously reported adsorbents and ascribed to multiple adsorption mechanisms including pore filling, π–π stacking interaction and electrostatic interaction between MB and N, O-HPC. Thermodynamic analyses suggested that MB adsorption onto N, O-HPC was spontaneous and endothermic. Furthermore, the as prepared adsorbent showed highly efficient adsorption for MB in tap water and synergistic adsorption performance toward MB and MO. Therefore, N, O-HPC derived from silkworm cocoon could be considered as an efficient, novel and advantageous material for wastewater remediation.

Synthesis of benzofurans from terminal alkynes and iodophenols catalyzed by recyclable palladium nanoparticles supported on N,O-dual doped hierarchical porous carbon under copper- and ligand-free conditions

Guijie Ji,Yanan Duan,Shaochun Zhang,Yong Yang

We herein report that a stable and recyclable heterogeneous catalyst, consisting of Pd nanoparticles supported on N , O -dual doped hierarchical porous carbon derived from naturally available and renewable biomass-bamboo shoots, which allows for highly efficient one-pot tandem reaction of o -iodophenols with terminal alkynes to synthesize biologically active 2-benzofuran derivatives under copper- and ligand-free conditions. The catalyst performed superior catalytic performance compared with the analogous Pd/C and supported on other metal oxides under otherwise identical conditions. A broad set of aryl and alkyl terminal alkynes can be effectively coupled /cyclized with various o -iodophenols to afford their corresponding 2-benzofurans in good to high yields with good tolerance of multiple functional groups. Moreover, the catalyst showed good stability and could be reused several times without significant loss of activity.

A hydrophobic deep eutectic solvent mediated sol-gel coating of solid phase microextraction fiber for determination of toluene, ethylbenzene and o-xylene in water coupled with GC-FID

Tiemei Li,Yuefei Song,Jingjie Xu,Jing Fan

As a new type of green solvents , deep eutectic solvents (DESs) are attracting more and more attentions due to their unique properties and cheapness. However, most DESs reported previously were hydrophilic and thus limiting their applications in aqueous medium. In this study, a novel hydrophobic DES was prepared by mixing ethylparaben and methyl trioctyl ammonium chloride , and density, viscosity, and contact angle of the DES were determined to character its solvent characteristics. Then, this DES was used as an efficient additive of sol-gel sorbent coating of poly(dimethylsiloxane) (PDMS) fiber. It was found that the addition of hydrophobic DES could generate a lot of neat pores in the PDMS fiber surface, thus significantly improving the performance of PDMS fiber coating. The feasibility of PDMS-DES adopted for head space solid phase microextraction was evaluated by GC-FID for the extraction and determination of volatile organic compounds, such as toluene, ethylbenzene and o -xylene. Key parameters affecting the extraction efficiency were investigated systematically. Under optimal conditions, the linear range with PDMS-DES fiber lied between 10 and 1000 μg L −1 , and the limit of detection (LOD) was in the range from 0.005 to 0.025 μg L −1 . Compared with homemade PDMS fiber, the peak area of signal response for the PDMS-DES fiber was 3 times higher. At the same time, the LOD for the proposed method was much lower than the commercial 100 µm-PDMS fiber coating.

Application of alkyl polyglycoside surfactant in ultrasonic-assisted extraction followed by macroporous resin enrichment for the separation of vitexin-2″-O-rhamnoside and vitexin from Crataegus pinnatifida leaves

Feng Han,Yupin Guo,Huiyan Gu,Fenglan Li,Baozhong Hu,Lei Yang

An alkyl polyglycoside (APG) surfactant was used in ultrasonic-assisted extraction to effectively extract vitexin-2″- O -rhamnoside (VOR) and vitexin (VIT) from Crataegus pinnatifida leaves. APG0810 was selected as the surfactant. The extraction process was optimized for ultrasonic power, the APG concentration, ultrasonic time, soaking time, and liquid–solid ratio. The proposed approach showed good recovery (99.80–102.50% for VOR and 98.83–103.19% for VIT) and reproducibility (relative standard deviation, n   =   5; 3.7% for VOR and 4.2% for VIT) for both components. The proposed sample preparation method is both simple and effective. The use of APG for extraction of key herbal ingredients shows great potential. Ten widely used commercial macroporous resins were evaluated in a screening study to identify a suitable resin for the separation and purification of VOR and VIT. After comparing static and dynamic adsorption and desorption processes, HPD100B was selected as the most suitable resin. After column adsorption and desorption on this resin, the target compounds VOR and VIT can be effectively separated from the APG0810 extraction solution. Recoveries of VOR and VIT were 89.27%   ±   0.42% and 85.29%   ±   0.36%, respectively. The purity of VOR increased from 35.0% to 58.3% and the purity of VIT increased from 12.5% to 19.9%.