CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Jingjing Sun,Shangqing Chen,Junfeng Wang,Yi Nie
The reduce of the silicon concentration to low level (<5 mg·L −1 ) from the reverse osmosis brine wastewater is challenging and desirable for the maintain the membrane life and performance, as well as the wastewater treatment costs. This work focuses on the removal of silicon from the reverse osmosis brine wastewater by adding FeCl 3 into the plant wastewater for simultaneous Fe(OH) 3 formation and silicon adsorption. The effects of pH, FeCl 3 dosing concentration, reaction time, and temperature on the silicon removal ratio were investigated. It was demonstrated that the silicon removal ratio could reach up to 94% and its residual concentration was 3.2 mg·L −1 , which met the require of water quality in the reverse osmosis system. These results showed that Fe(OH) 3 could effectively be formed by adding FeCl 3 and realize the efficient silicon removal from the reverse osmosis brine wastewater, even when chloride ion (Cl - ), sulfate anion ( S O 4 2 - ) and nitrate ion ( N O 3 - ) were present. Moreover, the adsorption thermodynamics, kinetics and isotherms during the process of the adsorption of silicon from the wastewater by Fe(OH) 3 were studied. The calculated adsorption capacity of silicon could reach 612.74 mg·g −1 , which was much larger than those of reported adsorbents. These results showed that the silicon removal process was spontaneously exothermic and mainly controlled by the physical adsorption and the monomolecular layer adsorption. This simple and cost-effective method could be used for the silicon removal from different kinds of Si-containing wastewater.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chunyan Fan,Xuxin Song,Yao Tang,Zehao Zang,Yangyang Ren,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Xinghua Zhang
Designing catalysts that simultaneously optimize both hydrogen and oxygen evolution reaction (HER and OER) emerges as a critical materials challenge. Co(OH)₂ is recognized as an effective OER electrocatalyst, but the low HER activity limits its application in overall water splitting. In this work, we synthesized sulfur (S) and selenium (Se) doped Co(OH) 2 catalysts with significantly enhanced HER activity using an electrochemical deposition method. The S-Co(OH) 2 and Se-Co(OH) 2 catalysts own low HER overpotentials of 48 mV and 59 mV at 10 mA cm −2 . And they require 1.56 V and 1.64 V at the same current density for water splitting, the sustain stable performance for > 100 h at current densities (100 mA cm −2 ) show their practical durability. Density Functional Theory (DFT) calculations and experimental results reveal that non-metal doping induces electronic reconfiguration of Co and optimizes the ΔG H* value for intermediate formation, thus accelerating hydrogen generation and enhancing the intrinsic HER activity. This work presents an effective strategy for incorporating non-metal elements into transition metal-based catalysts, and provides insight to boost HER intrinsic activity and achieve bifunctional catalytic performance for water splitting.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Guangyao Zhao,Zhehui Zhao,Sixing Zhang,Jiakang Yao,Na Cheng,Zhen Li,Yu Han,Xiaotao Zhang
Thermochemical energy storage technology based on the Ca(OH)₂/CaO dehydration-hydration reaction is considered as a promising strategy for addressing the transient storage of renewable energy due to high thermal storage density, long cycle characteristics, and safety. However, this technology suffers from drawbacks like agglomeration and sintering at high temperatures, along with poor cycling stability. In this study, the "dynamic" doping of Ca(OH)₂ with C₃N₄ was introduced to optimize the microstructure of particles, which enhanced the thermal performance, elevated conversion rate, and improved cycling stability, without reducing thermal storage density. In-depth characterizations revealed that C₃N₄ transformed Ca(OH)₂ from a flake-like structure to uniform spherical particles, approximately 10 μm in size. In particular, when the doping amount reached 30 wt%, the thermal storage density increased by 11.10% in contrast to Pure Ca(OH)₂, the peak reaction temperature decreased by 13.98°C, and the conversion rate improved to 91.22%. Simultaneously, the material exhibited excellent anti-caking properties, maintaining a thermal storage density of 776.46 J/g after 20 cycles, representing a 27% augmentation compared to the unmodified sample. The microscale effect of the material was retained. In summary, this outcome showcases outstanding comprehensive properties, taking thermochemical energy storage materials further into practical scenarios.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Anquan Zhu,Heng Liu,Lulu Qiao,Bin Liu,Kunlun Liu,Chuhao Luan,Kai Liu,Yin Zhou,Dewu Lin,Guoqiang Gan,Jiapei Li,Guo Hong,Wenjun Zhang
The electrochemical nitrate reduction reaction (eNO 3 RR) is widely recognized as a promising strategy for sustainable ammonia production and supporting the nitrogen cycle. However, its advancement is impeded by complex behavior of reaction intermediates and the inevitable reconstruction of precatalysts. To address these challenges, the generation and utilization of active hydrogen (*H) are strategically managed by tailoring the RuO 2 /Co 3 O 4 precatalyst and optimizing the electrolyte composition (OH − and NO 3 − concentration), thereby selectively enhancing ammonia formation. Consequently, the in situ reconstructed RuO 2 /Co(OH) 2 catalyst achieves an impressive ammonia yield of 35.9 ± 0.9 mg h −1 cm −2 and a Faradaic efficiency (FE) of 98.1 ± 2.6% at −0.3 V versus RHE. Furthermore, the catalyst shows significant potential for applications in nitrate-rich wastewater treatment and rechargeable Zn-NO 3 − batteries, maintaining stable operation for over 260 hours at 1 mA cm −2 with only a 6 mV increase in the potential window. Mechanistic studies reveal that electron-rich RuO 2 facilitates *H generation through water dissociation, which subsequently migrates to Co(OH) 2 to hydrogenate nitrogenous intermediates, selectively producing ammonia. This study highlights the importance of designing efficient catalytic systems that address both precatalyst reconstruction and the complexities of reactant and intermediate conversion in electrolytes, which are essential for managing the intricate electron and proton transfer processes involved in eNO 3 RR.
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CRYSTAL RESEARCH AND TECHNOLOGY
·
2025
·
IF 1.9
Yansheng Jiang,Wei Wei,Hangwei Jia,Muhammad Arif,Zhihua Yang,Xiuling Yan,Xueling Hou
With the continuous development of optical science and technology, there are higher requirements for the versatility and multi-application scenarios of optical devices. Organic–inorganic hybrid birefringent crystals have attracted much attention due to their high flexibility in molecular design and assembly. In this work, an alkaline earth metal 2-hydroxybutanedioate Ba 3 (C 4 H 4 O 5 ) 2 (OH) 2 crystallizing in the C 2/ c space group is synthesized by the hydrothermal method. Its unit cell parameters are a = 20.0584(7) Å, b = 7.4499(3) Å, c = 9.5087(3) Å, and β = 96.808(2) °. Ba 3 (C 4 H 4 O 5 ) 2 (OH) 2 polycrystalline powder is characterized in detail by Fourier transform infrared (FTIR) absorption spectroscopy, UV–vis–NIR diffuse reflectance spectroscopy, and simultaneous thermal analysis. In addition, theoretical analyses are carried out using first-principles calculations and Hirshfeld surface analysis. The theoretical birefringence of Ba 3 (C 4 H 4 O 5 ) 2 (OH) 2 is calculated to be 0.1 @546 nm. At the same time, UV–vis–NIR diffuse reflectance and band structure calculations show that Ba 3 (C 4 H 4 O 5 ) 2 (OH) 2 has an indirect bandgap of 5.11 eV with a UV cutoff edge of 203 nm. By leveraging the complementary attributes of organic and inorganic materials, Ba 3 (C 4 H 4 O 5 ) 2 (OH) 2 stands out as a promising UV birefringent candidate.
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Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 29
·11430-11438
·
IF 8.262
Hua Tian,Lin Wang,Yang Jiang,Lin Zhang,Yan Li,Li Hou,Cunqi Wu,Faming Gao
Graphene has great potential to significantly enhance the electrochemical activity of redox-active materials for supercapacitors. However, the agglomeration of graphene sheets remains a critical challenge to excellent energy storage performance of hybrid composites supported by graphene. Herein, a facile hydrothermal approach for the synthesis of porous Ni2CO3(OH)2/functionalized graphene (NCB/FGN) composites is developed. To improve the dispersion properties of graphene, sulfonated salicylic acid serving as a functionalized composition is covalently anchored to the surface of functionalized graphene. The systematic investigation indicates that the presence of functionalized graphene plays a crucial role in establishing the porous structure of hybrid composites. Compared to reduced graphene oxide (rGO), functionalized graphene is more beneficial to accommodate the expansion of the surface area and the reduction of the pore length in hybrid composites. The detailed electrochemical characterization demonstrates that the unique porous structure of NCB/FGN composites encompasses the great capability of rapid kinetic diffusion of active ions in electrolytes during the electrochemical reaction. The specific capacitance of NCB/FGN composites is 1508 F g−1 at a current density of 1 A g−1, higher than 1258 F g−1 for NCB/rGO composites and 1039 F g−1 for pristine NCB. After 3000 charge–discharge cycles at a current density of 10 A g−1, the specific capacitance of NCB/FGN composites still approaches their initial capacitance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Runhua Gao,Handing Liu,Bowen Fu,Shuyang Li,Ziyao Long,Dalin Sun,Yun Song
Germanium-based materials possess high theoretical capacity of approximately 1000 mAh·g −1 , nevertheless, the practical electrochemical performance is severely hampered by poor cyclability due to volumetric expansion of Ge upon cycling. Herein, novel hydrangea-like CoGeO 2 (OH) 2 constructed by 2D nanoplates has been facilely synthesized with the assistance of ethylene glycol and further applied to anode materials for lithium ion storage. The hydrangea-like CoGeO 2 (OH) 2 anode exhibits an enhanced specific capacity of 1174 mAh·g −1 at a current density of 0.5 A g −1 after 100 cycles. Such outstanding electrochemical performance could be accredited to the rationally designed hydrangea-like structure, which can relieve the interval stress aroused by lithiation/de-lithiation, shorten the pathway of electron/ion transportation and take advantage of the pseudocapacitive nature of two dimensional nanosheets that could improve the reaction kinetics and endow the material with remarkable rate capability. Moreover, the inherent Co-bonded hydroxyl groups facilitate the pseudocapacitive effect, and Ge-based component contributes to the capacity. These advantages help CoGeO 2 (OH) 2 hydrangeas gain a competitive edge over other candidates of anode materials for lithium-ion batteries.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yang Wang,Cuilian Sun,Tianxing Wu,Xiujing Xing,Wei Xiong,Hao Li
The electrocatalytic nitrite reduction reaction (NO 2 RR) converts harmful nitrite in aqueous media into high value-added ammonia (NH 3 ) under mild conditions, representing a promising technology that integrates environmental remediation and green NH 3 synthesis. However, the NO 2 RR undergoes a complex process involving multi-electron/proton transfer steps. Cu-based catalytic systems are universally plagued by the inherent bottleneck of insufficient activity and selectivity, and these dual constraints can hardly be simultaneously overcome by single-element doping alone. Herein, we fabricated fluoride and cobalt co-doped Cu 2 (OH) 2 CO 3 nanosheet catalysts via a one-step hydrothermal method, where the synergistic effect between anionic and cationic dopants enables the simultaneous tailoring of the electronic structure and active site distribution of the material. Electrochemical test results demonstrate that F and Co co-doping can significantly boost the NO 2 RR catalytic performance of Cu 2 (OH) 2 CO 3 . The optimal F-3 sample achieves the highest NH 3 Faradaic efficiency (FE) of 96.47% with an NH 3 yield rate of 28.55 mg h −1 mg cat -1 at −0.8 V (vs. RHE) in 0.15 M NaNO 2 neutral electrolyte, showing a nearly 2-fold performance improvement over the undoped counterpart and outperforming most reported non-noble metal NO 2 RR electrocatalysts. This work provides a high-performance NO 2 RR electrocatalyst for neutral aqueous systems, and demonstrates that anion-cation synergistic doping can break the intrinsic performance bottleneck of Cu-based hydroxyl compounds, offering a valuable modification strategy for rational catalyst design towards electrocatalytic nitrogen-containing pollutant conversion.
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Nature Communications
·
2026
·
IF 18.1
An Yechen,Mei Liang,Yang Ruijie,Cui Jun,Zhang Wenhai,Han Jing-Long,Jiang Wenli,Ren Ruiyun,Gao Xiaoxu,He Zhihui,Xu Haoran,Yan Ruifeng,An Quan-Fu,Li Zhiling,Cheng Haoyi,Tao Yu,Wang Aijie,Zeng Zhiyuan
Membrane-based separation offers a sustainable route for resource recovery from high-salinity organic wastewater, yet graphene oxide (GO) membranes remain constrained by poor selectivity, limited solvent stability, and challenges in scale-up. Here, we report a hydroxylated single-walled carbon nanotube (SWCNT-OH) reinforced GO membrane, in which SWCNT-OH promotes robust inorganic crosslinking with sodium tetraborate (Na 2 B 4 O 7 ) to form rapid transport channels for water and ions, while suppressing organic passage. This architecture enhances the moxifloxacin (MXF)/NaCl separation factor more than fivefold (from 4.2 to 22.2) and increases water permeability over fourfold (from 7.2 to 30.1 l m −2 h −1 bar −1 ). The membrane was scaled up to 11 m 2 and deployed for continuous treatment of MXF crystallization mother liquor over seven days, delivering a stable recovery of 10 kg MXF per day under industrially relevant conditions. These findings establish a scalable strategy for the design of robust nanocarbon-based membranes, advancing resource-efficient treatment of high-salinity wastewater.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiangyang Gao,Xin Liu,Chenxi Zhou,Qiyan Wang,Ruya Guo
Tailoring efficient bifunctional electrocatalyst with dual-heterojunction is crucial for overall water splitting (OWS). Herein, a multicomponent bifunctional catalyst with dual-heterojunction is rapidly constructed via sequential electrodeposition for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Density functional theory (DFT) calculations reveal that bidirectional electron transfer at the interface induces a double built-in electric field (BIEF) in Pt/CeO 2 -Ni(OH) 2 , which offers additional impetus for electron transport and brings the d -band center closer to the Fermi level, thereby optimizing reaction kinetics and the adsorption of reaction intermediates. Active Pt and CeO 2 nanoparticles (NPs) are uniformly anchored on the stable Ni(OH) 2 nanoflocs, ensuring high exposure of active sites and preventing NPs aggregation. Meanwhile, Ni(OH) 2 , serving as abundant electron donor center, forms dual heterointerface with Pt and CeO 2 (Pt-Ni(OH) 2 and CeO 2 -Ni(OH) 2 ), which ensures structural stability during electrochemical processes. Benefiting from the dual-heterojunction and the unique structure design, Pt/CeO 2 -Ni(OH) 2 exhibits excellent electrocatalytic performance, requiring only 66 mV (10 mA cm −2 ) and 278 mV (100 mA cm −2 ) for HER and OER, respectively. Remarkably, the two-electrode electrolyzer based on Pt/CeO 2 -Ni(OH) 2 electrode requires only 1.49 V to deliver 10 mA cm −2 with an excellent durability for OWS. This work brings light to the rational design and directional construction of bifunctional electrocatalyst hybrid nanomaterials with multiple heterojunctions.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·Vol. 60
·期 32
·22965-22976
·
IF 12.2
Cheng Dong,Ma Runhao,Tan Yuansen,Wu Zhongkuan,Ding Haoran,Wu Fan,Chen Si,Wang Huaqing,Lou Guangyu,Ma Yingying,Wang Binbin,He Feng
Oxygenation
of mackinawite (FeS) at redox interfaces
constitutes
a key biogeochemical process that generates hydroxyl radicals ( • OH) and facilitates contaminant attenuation. However,
the influence of common inorganic ligands such as tripolyphosphate
(TPP) on interfacial electron transfer in this process remains poorly
understood. Herein, 1.0 mM TPP increased cumulative • OH production approximately 23.5-fold over 180 min of FeS oxygenation,
with the electron utilization efficiency for • OH
production increasing from 0.33% to 8.18%. TPP enhanced • OH generation by promoting Fe(II) dissolution, thereby driving homogeneous
Fenton-like reactions, while facilitating Fe(III)/Fe(II) redox cycling
through solid–liquid interactions. Additionally, TPP acted
as an interfacial coordination modulator by rearranging the local
Fe(II) environment, and the resulting surface Fe(II)-TPP complexes
improved the utilization of structural electrons. Electrochemical
measurements and DFT calculations indicated that this interfacial
coordination suppressed structural Fe(II) oxidation and reduced unproductive
electron consumption, while lowering the energy barrier for H 2 O 2 -forming O 2 activation at TPP-modified
FeS sites. XRD, FTIR, and EXAFS analyses showed that TPP adsorption
inhibited lepidocrocite crystallization and redirected secondary mineral
evolution toward ferrihydrite-rich products. These findings elucidate
how ubiquitous ligands regulate mineral-water interfacial processes
and • OH generation, providing a basis for optimizing
FeS-based environmental remediation technologies.
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NANO
·
2024
·
IF 1
Junxiang Mo,Jun Li,Jing Li,Yashan Li
The development of composite materials is a key area of research for enhancing the electrochemical performance of electrode materials. In this study, NiCo–S nanostructured hybrid electrode materials were prepared on nickel foam (NF) by using binary metal–organic frameworks (MOFs) as the sacrificial template through a two-step hydrothermal method. Ni–MOF was then deposited on the surface of NiCo–S/NF through the hydrothermal method and subsequently converted into Ni(OH) 2 through a subsequent alkalization treatment. The duration of the Ni–MOF hydrothermal process was varied as a parameter. NiCo–S@Ni–MOF/NF was prepared through hydrothermal reaction for 6 h, 9 h and 12 h, followed by heating in a 6 M KOH solution at 75 ∘ C for 6 h in a water bath. The electrode materials with the best morphology and electrochemical properties were obtained when the hydrothermal reaction time was 6 h. The optimized electrode had a specific capacity of 2533.2 F ⋅ g − 1 at 1 A ⋅ g − 1 and a capacity retention rate of 60.8% at 10 A ⋅ g − 1 , which indicated good rate performance. Additionally, the electrode material demonstrated excellent cycling stability, with a capacity retention rate of 95.3% after 5000 cycles at 50 mV ⋅ s − 1 . The energy density of the hybrid supercapacitor device assembled from this electrode material was 33.5 Wh ⋅ kg − 1 when the power density was 849.89 W ⋅ kg − 1 at a current density of 1 A ⋅ g − 1 .
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