ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Na Zhang,Ying Liu,Zhenchen Wan,Yanting Zhang,Wenjing Xie,Peng Zhang,Man Tong,Songhu Yuan
Reactive oxygen species (ROS) production in O2-perturbed subsurface environments has been increasingly documented in recent years. However, the constraining conditions under which abiotic and/or biotic mechanisms predominate for ROS production remain ambiguous. Here, we demonstrate that the ROS production mechanism, biotic and abiotic, is determined by sediment redox properties and sediment compositions. Upon the oxygenation of 10 field sediments, the cumulative H2O2 concentrations reached up to 554 μmol/kg within 2 h. The autoclaving sterilization experiments showed that H2O2 could be produced by both biotic and abiotic processes depending on the redox conditions. However, only the abiotic process could produce significant levels of •OH, and the production yield was closely related to the sediment components, particularly sediment Fe(II) and organic matter. Fe(II) bound with organic matter led to high yields of H2O2 and •OH production. Sediment oxygenation contributed to the appearance of H2O2 in groundwater, with the abiotic mechanism producing higher instantaneous H2O2 concentrations than the biotic mechanism. These findings reveal that the redox conditions, compositions, and texture of sediments collectively control abiotic and biotic mechanisms for ROS production, which assists the identification of ROS production hotspots and the understanding of ROS distribution and utilization in the subsurface.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Huifang Lv,Haibo Rao,Zhiyu Zhou,Yang Zhao,Hualiang Wei,Zexiang Chen,Xiao Zhang,Yunlu Dai,Yanli Gong,Yan Wang
Improving the energy storage capabilities of aqueous alkaline supercapatteries relies heavily on the development of high-performance anode materials. Here, we presented a one-step composite molten salts method for the preparation of cobalt selenium hydroxide and Bi 2 O 2 Se heterostructure composites (CoSe(OH)/Bi 2 O 2 Se). The composite capitalizes on the advantageous interlayer properties of two-dimensional (2D) layered Bi 2 O 2 Se, connected via weak Van der Waals forces, alongside the high theoretical specific capacity of cobalt hydroxide derived from cobalt selenium hydroxide. This synergy facilitates efficient ion transport, thus exhibiting remarkable electrochemical characteristics. Specifically, CoSe(OH)/Bi 2 O 2 Se demonstrates a great specific capacity of 313.6 mAh/g at 1 A/g, significantly outperforming pure Bi 2 O 2 Se nanosheets. Moreover, CoSe(OH)/Bi 2 O 2 Se exhibits remarkable rate capability with 63.8% capacitance retention at sufficiently high current density (20 A/g), and excellent cycle performance that the capacitance remains is 70.3% after 1000 cycles of GCD testing. Additionally, ex-situ XRD analysis of CoSe(OH)/Bi 2 O 2 Se at different charge and discharge stages provides further insights into its energy storage mechanism. Furthermore, the NiAl-Cl LDH// CoSe(OH)/Bi 2 O 2 Se device demonstrates high power density and energy density. These results validate the feasibility of enhancing the electrochemical performance of 2D Bi 2 O 2 Se layered materials through the incorporation of active and cost-effective transition metal oxides/hydroxides, highlighting the tremendous potential of CoSe(OH)/Bi 2 O 2 Se as a negative electrode material for aqueous alkaline supercapattery.
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CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Jian Jia,Mei-Ling Xu,Xiao-Jie Jiang,Li-Na Zhang,Xiao-Lei Lu,Jiang Zhu,Xin Cheng
The utilization of cement-stabilized iron tailings as pavement base necessitates rigorous scrutiny of heavy metal ion leaching, particularly under fluctuating environmental pH conditions. Given the insufficient capacity of cement to stabilize Cr(Ⅵ), this paper explores the integration of defect-engineered metal-organic frameworks (MOFs) as additives in cement-stabilized iron tailings to reduce Cr(Ⅵ) leaching. Results shows that the utilization of MOFs material mitigates Cr(VI) leaching in cement-stabilized iron tailings while enhancing their mechanical properties. The Cr(Ⅵ) leaching from samples with the addition of UiO-66-(OH)₂ and UiO-66-(OH)₂-D exhibited a substantial reduction of 60.2 % and 88.6 %, respectively. The stabilized mechanism is attributed to the strong affinity between Cr(Ⅵ) and hydroxyl groups in MOFs. Furthermore, UiO-66-(OH) 2 -D has a larger pore diameter to expose more hydroxyl groups, which greatly improves its adsorption performance for Cr(Ⅵ). Meanwhile, the unconfined compressive strength (UCS), splitting strength and compressive resilience modulus increased by 13.4 %, 35.1 % and 45.7 %, respectively. The mechanisms underlie that the MOFs enhanced the early hydration process and optimized of the pore size distribution within the solidified body. This study presents a viable and efficient approach for the sustained mitigation of Cr(Ⅵ) leaching within cement-stabilized iron tailings.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Jin Yue,Sun Liping,Wang Yuechen,Huo Lihua,Zhao Hui
Electrocatalytic nitrate reduction reaction (NO 3 RR) provides a promising method for ammonia (NH 3 ) producing. It is urgent to develop efficient catalysts with improved NO 3 RR performance. In this paper, Cu 3 P@Co(OH) 2 /CF heterostructure catalyst is constructed by electrodeposition of cobalt hydroxide (Co(OH) 2 ) nanosheet on the surface of copper phosphide (Cu 3 P) nanorod , and used as a self-supporting cathode for electrocatalytic reduction of nitrate to ammonia. The NH 3 yield reaches 0.19 mmol h −1 cm −2 at a potential of −0.17 V vs. RHE, and the faraday efficiency (FE) is 86.7 %. The study manifests that the built-in electric field generated at the p-n heterojunction interface optimizes the electron migration kinetics, and promotes the adsorption of nitrate and the convention of intermediate product NO 2 − into ammonia. As a consequence, the selectivity of NH3 is improved. The Zn-nitrate battery is assembled with the designed catalyst as the cathode, to reach a peak power density of 5.16 mW cm −2 . The prepared catalyst realizes three effective functions: power output, ammonia synthesis , and nitrate pollutants treatment.
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Journal of Cleaner Production
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2017
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IF 5.715
De-Bin Li,Yun-Quan Liu,Yue-Yuan Ye,Shui-Rong Li,Duo Wang
Experiments were conducted to elucidate the mechanism of reaction between guaiacol and Ca(OH) 2 in water based on in situ FT-IR, 1 H NMR, ICP-AES and TGA analyses. Three phases were revealed for this reaction when guaiacol was dropped into the solution of Ca(OH) 2 , and the final molar ratio of guaiacol to Ca 2+ reaches 4. It was found that an acid–base reaction occurs in the first reaction phase. However, the second reaction phase includes not only the acid-base reaction, but also the accompanied coordination reaction between oxygen atom of hydroxyl group in guaiacol and Ca 2+ . The third reaction phase is also the coordination reaction, particularly, the one between the hydrogen atom in guaiacol and Ca 2+ . Based on the mechanism study, a novel circulating precipitation agent was developed and tested for the extraction of phenolic compounds from the simulated wastewater. The result showed that 96.63% guaiacol could be extracted from the simulated wastewater with the novel extraction technology at the optimum reaction conditions.
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Journal of Energy Chemistry
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2024
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IF 14
Peiyun Zhou,Haokun Pan,Guangtong Hai,Xiang Liu,Xiubing Huang,Ge Wang
In this work, nickel foam supported CeO 2 -modified CoBDC (BDC stands for terephthalic acid linker) metal-organic frameworks (NF/CoBDC@CeO 2 ) are prepared by hydrothermal and subsequent impregnation methods, which can be further transformed to NF/CoOOH@CeO 2 by reconstruction during the electrocatalytic test. The obtained NF/CoOOH@CeO 2 exhibits excellent performance in electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) because the introduction of CeO 2 can optimize the electronic structure of the heterointerface and accelerate the accumulation of *OH. It requires only a potential of 1.290 V RHE to provide a current density of 50 mA cm −2 in 1.0 M KOH + 50 mM HMF, which is 222 mV lower than that required in 1.0 M KOH (1.512 V RHE ). In addition, density-functional theory calculation results demonstrate that CeO 2 biases the electrons to the CoOOH side at the heterointerface and promotes the adsorption of *OH and *HMF on the catalyst surface, which lower the reaction energy barrier and facilitate the electrocatalytic oxidation process.
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CHEMICAL PHYSICS
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2024
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IF 2
Xiaoxuan Li,Ying Lv,Zhifei Sun,Xuelian Chen,Meixia Xiao,Zhiru Li
Defect engineering, particularly oxygen vacancy introduction, enhances photocatalytic material performance by regulating light response and charge carrier utilization, while providing active sites. This project investigates oxygen vacancies in Bi 2 O 2 [BO 2 (OH)] for Rhodamine B and levofloxacin degradation. Findings show that 10 min of UV irradiation optimizes photocatalytic efficiency through oxygen vacancy activation, improving light absorption and charge carrier efficiency, leading to effective degradation of levofloxacin. This study establishes a link between photo-induced oxygen vacancies and photocatalytic performance, offering insights for developing efficient photocatalysts and managing antibiotic pollution.
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JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Zhiru Li,Ying Lv,Xuelian Chen,Meixia Xiao,Lei Wang,Xiaoxuan Li,Yumin Li
Aiming at the challenges such as wide band gap, limited surface reactivity, and sluggish reaction kinetics of the promising Aurivillius compound Bi 2 O 2 (OH)NO 3 (BON). Our endeavors culminated in the successful creation of layered BON nanoplates featuring surface oxygen vacancies and Pd nanoparticles deposition by UV light irradiation, elegantly designated as Pd-OVs BON. This accomplishment was realized through the adept application of a two-step photoreduction technique, skillfully executed in both pristine water and ethanol-water environments. We then evaluated the effectiveness of Pd-OVs BON in degrading a series of tetracycline antibiotics. Our evaluation involved a comprehensive approach, encompassing systematic morphology characterization and photoelectrochemical analysis. Additionally, we investigated how surface oxygen vacancies and the plasma effects of Pd impact the separation and transport of photogenerated carriers, as well as the photocatalytic performance. The outcomes of this study indicate that Pd-OVs BON holds substantial potential for the photodegradation of antibiotics. Its layered nanoplates structure enhances the specific active surface area of BON, while the surface oxygen vacancies generated through photoreduction create more active sites for catalyzing antibiotic degradation reactions. Furthermore, the introduction of Pd nanoparticles onto the OVs-BON surface during the secondary photoreduction process induces localized surface plasmon resonance. This phenomenon broadens the photocatalyst's responsiveness to a wider range of light wavelengths, enabling efficient utilization of visible light and facilitating the effective decomposition of antibiotic molecules.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Liwen Shen,Feiyang Zhao,Huijuan Liu,Jicheng Li,Yang Lu,Jun Liu,Nianzhao Gao,Shuangfei Xiang,Shujun Zhao,Guocheng Zhu,Parpiev Khabibulla,Juramirza Kayumov,Feiya Fu,Xiangdong Liu
The agricultural industry produces a substantial volume of rice straw (RS) annually, highlighting the importance of recycling RS for sustainable materials. However, the poor interfacial compatibility between RS and polymers often leads to drawbacks in their composites, such as water-swelling and limited tensile strength. Here, we propose a novel approach using Ca(OH) 2 that offers several distinct advantages: enhancement of interfacial compatibility, elimination of the need for water washing, and formation of calcified hybrid particles on fiber surfaces by capturing CO 2 from the atmosphere. The non-washing calcified rice straw (NCRS) fibers were used to fabricate composites with unsaturated polyester resin (UPR), resulting in NCRS/UPR composites exhibiting significant enhancements in water resistance and mechanical properties compared to RS/UPR composites. The NCRS/UPR composites achieved a water absorption rate below 25 %, thickness swelling rate below 10 %, and tensile strength of 19.9 MPa. This work comprehensively explored the mechanism underlying these achievements through experimental studies. Findings suggest that CaCO 3 particles involving with released lignin act as an interfacial bridge between RS fiber surface and UPR, resulting in significantly improved properties. This approach demonstrates promising prospects as a simple and eco-friendly methodology for manufacturing RS-based composite materials.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jie Liu,Tongxu Gu,Rui sun,Jiaojiao Sun,Jian Yin,Pengli Bai,Huancai Yin
Classical gold nanoparticle-based colorimetric immunochromatographic assay (ICA) exhibits moderate performance, limiting their application in trace detection. In this study, perovskite-MSN nanocomposites with high quantum yield (74.7 %), a narrow full width at half maximum (29.5 nm) and excellent water stability were synthesized using in situ crystallization growth and a water-assisted strategy. Carboxyl-modified perovskite-MSN nanocomposites were employed to label anti-gliadin monoclonal antibody (mAb) and construct dual-mode fluorescent ICA (FICA) for determination of gliadin in milk and beef samples. Compared to the traditional AuNP-based colorimetric ICA strips, the CsM-H-based FICA demonstrated improved sensitivity, with a limit of detection (LOD) of 3.62 ng/mL in quantitative analysis. The CsM-H-based FICA strips exhibited average recoveries ranging from 90.2 % to 110.0 %, with coefficients of variation (CVs) between 3.3 % and 7.4 % for milk and beef samples. The ultra-stable perovskite-MSN nanocomposites provided the FICA strip with excellent stability, enabling storage for up to six months at room temperature. This study highlights the advantages of CsM-H-based FICA, including its rapidity, simplicity, and cost-effectiveness, as a promising POCT biosensor.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Xinyu Duan,Huiping Jia,Tingting Cao,Hongbin Yu,Yanan Zhang,Ying Lu,Dandan Zhou
Nitrate, widely present in water, can be excited by UV light and generate reactive nitrogen species (RNS) etc., facilitating pollutants selective degradation. In this work, the promoting effect of nitrate on atrazine removal in the Z-scheme Cs 3 Bi 2 I 9 /BiVO 4 (CBI/BVO) photocatalytic system was studied. The CBI/BVO composite utilized CBI and BVO excitation to enhance photogenerated carriers production, and the Z-scheme heterojunction to increase photoinduced carriers separation yield, with a maximum value of 15.41 times that of pure BVO, releasing CBI electrons and BVO holes with powerful redox ability. Thanks to nitrate addition, the atrazine degradation improved, whose kinetic constant was 14.46 and 2.37 times higher than that of nitrate photolysis and 0.32-CBI/BVO photocatalysis . DFT , HPLC-MS, EPR , and toxicity assessments indicated the electron rich portion of atrazine and its intermediates were susceptible to RNS attack and underwent dechlorination , that combined with the oxidation brought by ·OH, synergistically promoting atrazine degradation, mineralization, and detoxification.
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FUEL
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2017
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IF 4.601
Zhuqian Xiao,Yu Fan,Yongjie Cheng,Qiang Zhang,Qing Ge,Ruyi Sha,Jianbing Ji,Jianwei Mao
The catalytic transformation of cellulose to polyols is one of the significant strategies to overcome the shortage of fossil fuels. Here we report a simple but effective preparation method for Ni-W/SiO 2 catalysts by introduction of chelating agents (ammonium hydroxide and ethanediamine) coupled with organic reducing agent (ethylene glycol). The ethylene glycol (EG) yield from microcrystalline cellulose could reach up to 63.3% at 240 °C, 5.0 MPa H 2 for 2.0 h over 15%Ni-20%W/SiO 2 -EEG catalyst. Moreover, some key parameters of process conditions including calcining temperature, reaction temperature and time, H 2 pressure and the recycling use of catalysts were investigated. Both theoretical and experimental studies suggested that 15%Ni-20%W/SiO 2 -EEG catalyst showed the best activity and stability for cascading steps for EG formation at this reaction condition. By the detailed analysis of Ni-W/SiO 2 catalysts after calcination via FT-IR, XRD , XPS , thermogravimetry (TG), TEM and element mapping, it could be concluded that on the surface of 15%Ni-20%W/SiO 2 -EEG catalyst, the particles showed less agglomeration and more homogeneous on the surface of SiO 2 . Some Ni x W y alloys (NiW, Ni 2 W 4 C) were also formed. Furthermore, it was found that the introduction of ethanediamine could promote the actual loading of nickel and tungsten species slightly according to the analysis of ICP-OES test.
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