JOURNAL OF CHEMICAL THERMODYNAMICS
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2019
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IF 2.29
Jun-Feng Wang,Pan Liang
A pure barium borate of BaB 8 O 11 (OH) 4 ·3H 2 O has been synthesized and characterized by XRD, FT-IR, TGA, and chemical analysis. The molar enthalpies of solution of BaB 8 O 11 (OH) 4 ·3H 2 O in 1 mol dm −3 HCl(aq), and Ba(OH) 2 ·8H 2 O in the mixture solvent of {2.00 cm 3 of 1 mol·dm −3 HCl + H 3 BO 3 (aq)} were measured by microcalorimeter at T = 298.15 K, respectively. With the use of previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol·dm −3 HCl(aq), and the standard molar enthalpies of formation for Ba(OH) 2 ·8H 2 O(s), H 3 BO 3 (s), and H 2 O(l), the standard molar enthalpy of formation of −(7500.6 ± 6.5) kJ·mol −1 at T = 298.15 K was obtained based on an appropriate thermochemical cycle. Moreover, the molar enthalpy of formation of −6091.7 kJ mol −1 for [B 8 O 11 (OH) 4 ] 2− was estimated by a group contribution method, which was used to predict the Δ f H m o of a series of alkaline-earth metal borates for MB 8 O 11 (OH) 4 (M = Ca, Sr, Ba).
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zhikang Li,Guoping Zhao,Chen Sun,Jianan Li,Chengzhe Xie,Yang Hou,Zhongjian Li,Lecheng Lei,Bin Yang
The electrochemically upgrading sulfate to high-value persulfate (PS) offers significant potential but suffers from impaired selectivity due to competing oxygen evolution reactions (OER). Boron-doped diamond (BDD) electrodes serve as ideal anodes for PS electrosynthesis due to their wide electrochemical window, low adsorption propensity, and superior hydroxyl radical ( OH) generation capacity. Herein, we engineered BDD anodes via a facile one-pot deposition-calcination strategy to construct a Ce 0.1 Sn 2.2 Sb 0.25 O x catalytic layer, dramatically enhancing OH production. The modified electrode exhibited substantially elevated oxygen evolution potential (increasing from 2.726 to 2.905 V vs. RHE), achieved a record Faradaic efficiency (FE) of 90.22 % for PS synthesis at 250 mA/cm 2 , and reached 66.7 μmol/min/cm 2 . The resulting PS solution was concentrated to 1.16 mol/L (15.3 wt%), the highest value reported to date for electrochemical PS synthesis. Electron paramagnetic resonance (EPR) studies confirmed the significant augmentation in OH yields. The incorporation of Sb refined SnO 2 crystallites and strengthened H 2 O adsorption, whereas trace Ce doping markedly improved the stability of catalytic layer and facilitated electron transfer, as evidenced by only a 0.95 % activity loss after 30 successive electrolysis cycles. Mechanistic investigations reveal that the catalytic layer preferentially promotes the indirect oxidation pathways via OH mediation, leading to a marked increase in PS selectivity. This work establishes a simple, cost-effective, and scalable BDD modification strategy with significant industrial potential for electrochemical PS synthesis and waste sulfate resource valorization.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Ziyi Jiang,Xintong Cao,Enrou Mei,Ye He,Jiapeng Yang,Zhaoping Chen,Yang Li,Xiaojuan Liang,Weidong Xiang
Perovskite quantum dots (PQDs) are widely used in the backlight field of liquid crystal displays (LCDs) due to their narrow-band emission and high color purity. However, their high cost and insufficient stability seriously restrict the industrialization process. This study innovatively adopted the environmentally friendly Pb(OH)2 to replace the traditional PbBr2 lead source, successfully reducing the raw material cost by nearly 50%. At the same time, it significantly improved the optical performance of CsPbBr3@glass by reducing the formation of bromine vacancies. By further introducing La3+, the prepared La3+@CsPbBr3@glass achieved a PLQY increase from 48 to 86%, and maintained a PL intensity of 87% under harsh conditions (60 °C, 90% RH, and continuous exposure to 8000 nit blue light for 40 days), breaking through the stability bottleneck. The color gamut of the CsPbBr3&CsPbBr1I2@glass@PET light conversion film developed on this basis is 94.75% of the NTSC 1953 standard and 70.74% of the Rec.2020 standard. When they are applied to LCD screens, they significantly enhance color performance. It provides an efficient, stable, and low-cost industrial solution for quantum dot film technology.
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PubMed
高影响因子
C-Journal of Carbon Research
·
2025
·Vol. 11
·期 2
·32
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IF 2.9
Ran An,Jinyue Liu,Haomiao Ma,Yuqing Yan,Yuanru Guo,Qingjiang Pan,Shujun Li
To address the need for reducing carbon emissions and enhancing the sustainable utilization of non-fossil resources, a one-step calcination strategy has been developed to fabricate hierarchical carbon aerogels from balsa wood. The resulting wood-derived carbon aerogels (WCA) were functionalized with Mg(OH)2to boost their environmental remediation potential. Comprehensive characterization using XRD, FT-IR, XPS, and SEM confirmed that the optimized WCA/Mg(OH)2composite (WCAMg) retained a three-dimensional hierarchical porous structure, and Mg(OH)2nanosheets were attached to it. The adsorption performance of WCAMg composites towards Cd2+was systematically investigated through controlled experiments, which focused on three critical variables (Mg(OH)2loading content, initial Cd2+concentration and solution ionic strength). The functionalized WCAMg demonstrated a maximum Cd2+adsorption capacity of 351.1 mg g−1—a tenfold improvement over pristine WCA. Combined with exceptional adsorption efficiency, this biomass-derived composite offers an eco-friendly, cost-effective solution for heavy metal ion remediation. Its scalable fabrication from renewable resources aligns with sustainable water treatment objectives, presenting the advantage of pollution mitigation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Mengyao Xue,Yuankang Bao,Xun Xu,Luliang Liao,Ping Li,Hao Zhang,Deliang Li,Binbin Wei,Shuwang Duo
Bimetallic nickel-molybdenum nitride (NiMoN) catalysts have attracted great attention due to their remarkable similarity to group VIII noble metals in terms of electronic structure, good electron conductivity, and durability for the hydrogen evolution reaction (HER). However, the existing approaches for fabricating NiMoN catalysts usually entail a series of multiple steps and hazardous ammoniated ingredient. As a result, these methods are difficult to be scaled up for large-area fabrication towards industrial water splitting. Herein, a hierarchical composite NiMoN@Ni(OH) 2 @NF composite electrode with a sheet morphology was synthesized based on a rational combination of seawater etching and magnetron sputtering. This method is easily scalable for producing large-area electrodes with minimal pollution. The incorporation of Ni(OH) 2 @NF nanoarray carriers enhances the exposure of additional active sites on the NiMoN layer, thereby augmenting the electrochemically active specific surface area of the electrode.The as-synthesized NiMoN@Ni(OH) 2 @NF electrode demonstrates excellent HER activity, with an overpotential of 57 mV at 10 mA cm −2 , and exhibits remarkable long-term catalytic stability for over 100 h at a current density of 100 mA cm −2 .This study presents an eco-friendly and straightforward method for preparing large-scale transition metal nitride catalysts with high catalytic activity.
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POLYMER COMPOSITES
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2025
·
IF 4.7
Heping Zhang,Wenpu Zhang,Mingwei Hu,Yiqi Tang,Gongcheng Xu,Xinghui Hou,Ying Zhou
Ethylene Vinyl Acetate (EVA) has been widely used in various industries for its excellent flexibility and corrosion resistance. However, its high flammability poses significant safety risks, necessitating the incorporation of flame-retardants to improve its fire resistance. This study focuses on the wet surface modification of magnesium hydroxide (MH) using n-octyl triethoxysilane (OTES). The hydrolysis products of OTES react with the OH on the MH surface to form Si O Mg bonds, thereby enhancing the surface hydrophobicity and compatibility with EVA. MMH was incorporated into EVA, and the resulting composites were characterized using XRD, SEM, TG, BET, FT-IR, and XPS. The optimal modification conditions were achieved with an OTES dosage of 3 wt% at 45 °C for 60 min, yielding a contact angle of 142°, an activation index of 98.12%, and an oil absorption rate of 43 mL/100 g. The EVA/MMH composites demonstrated superior thermal stability and flame retardancy compared to unmodified EVA. Specifically, the limiting oxygen index (LOI) of EVA/MMH-55 reached 34.9%, and it achieved a UL-94 V-0 rating, indicating excellent self-extinguishing properties. This study provides a novel approach for the surface modification of MH, offering a practical solution to enhance the flame retardancy and thermal stability of EVA composites. Highlights Hydrophobic MMH is obtained by wet surface coating modification of MH by OTES. Contact angle of MMH is 142° under optimal modification conditions (60 min, 45 °C and 3 wt%) The chemical reaction process between OTES and the MH surface has been analyzed, revealing the mechanism by which the Si OH groups on OTES react with the OH groups on the MH surface to form Si O Mg bonds, which intertwine to form a hydrophobic layer. The specific surface area of MMH is reduced, and it has good compatibility with EVA resin. The LOI of EVA/MMH-55 is 34.9%, making it a nonflammable material.
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Advanced Sustainable Systems
·
2025
·
IF 6.1
Yu Ren,Youhao Zhang,Zizheng Zhou,Yi Fang,Yuzhuo Wang,Yingjie Li
Ca(OH) 2 can be used in CO 2 uptake from the flue gas in fossil-fired power plants. Compared with indirect method where Ca(OH) 2 is first converted into CaO and then uptakes CO 2 , direct CO 2 uptake by Ca(OH) 2 occurs at lower temperature, leading to slighter sintering. However, the direct CO 2 uptake capacity of Ca(OH) 2 should be further enhanced. In this study, Ca(OH) 2 is doped with Mn to improve its direct CO 2 uptake capacity in carbonation-calcination-hydration cycles. The cyclic tests are conducted in a triple fixed-bed reactor. The mechanism of CO 2 adsorbed on Mn-modified Ca(OH) 2 is determined by density functional theory calculations. In the first cycle, Mn-modified sorbents acquire highest carbonation conversion at 400 °C, which is 40 °C lower than Ca(OH) 2 . The modified Ca(OH) 2 with Ca/Mn molar ratio of 100:0.75 exhibits the best performance, and its carbonation conversions reach 0.76 and 0.59 in the 1st and 20th cycles, respectively, which are 28% and 18% higher than those of Ca(OH) 2 . Furthermore, carbonation conversion of this Mn-modified Ca(OH) 2 decreases by within 1.00% from cycle 5 to 20. Mn addition boots oxygen vacancy, increases the surface area and pore volume, and reduces the energy barrier for carbonation of Ca(OH) 2 . Mn-modified Ca(OH) 2 as CO 2 sorbent appears promising.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shujuan Lian,Xiaoshuang Shi,Mingyi Lu,Mengdan Zhang,Xiaohuan Dong,Xu Li,Quan Feng,Rongbo Guo
Due to the persistence in residue and the emission to environment, antibiotics have become the emerging contaminants. Tetracyclines, as the largest amount of antibiotics in the breeding industry, were investigated in this study. For eliminating the tetracyclines, anaerobic culture was enriched from livestock waste after four generations and FeOn(OH)m modified oyster shell powders (OSPs) were amended into the enrichment culture as auxiliary method. Tetracycline and oxytetracycline were selected as the model compounds. The adsorption models (Langmuir and Freundlich isotherms) of tetracycline and microbes on OSPs were simulated respectively. With the addition of FeOn(OH)m modified OSPs, the transformation efficiency of oxytetracycline achieved 81.5% after 22 days’ incubation, approximately 1.85 times higher than the 4th generation (G-IV) enrichment culture without modified OSPs. Dehydration, demethylation, dehydroxylation and decarboxylation took place under anaerobic condition, inferred from the detected metabolites transformed from oxytetracycline. Genus Methanosarcina and two operational taxonomic units (OTUs) assigned to order Clostridiales , showed an increasing trend on abundance, indicating the contribution to transformation of oxytetracycline. Therefore, the FeOn(OH)m modified OSPs and enrichment culture can accelerate the transformation of oxytetracycline simultaneously, indicating a promising utilization not only for waste water system but also for antibiotic contaminated biomass treatment.
研究领域:
环境微生物学
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污染物生物降解
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环境工程
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抗生素去除
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吸附材料
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厌氧消化
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药物代谢
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9
Guoqiang Li,Runze Liu,Miaoqing Yang,Yiwei Zhao,Yimin Zhu,Lingen Wang,Long Huang,Yingke Fang,Yuan Li,Huiying Yang,Hongbin Xu
The persistent presence of recalcitrant micropollutants in aquatic environments poses significant environmental challenges. In this study, a porous polytetrafluoroethylene (PTFE) membrane was used to divide the traditional single-chamber Electro-peroxone (EP) process into a dual-chamber configuration (M/EP), and its pollutant degradation performance was systematically investigated. For ibuprofen (IBP) degradation, the M/EP process achieved a kinetic rate constant ( k obs ) of 0.215 min −1 , which is markedly higher than those of the EP process (0.133 min −1 ) under the high alkaline conditions. This can be attributed to the fact that the •OH concentration generated in the M/EP process was 2 times higher than that in the EP process at initial pH 11. Quenching experiments revealed that •OH contributed the most to IBP degradation among the ROS. Meanwhile, the PTFE membrane prevents H 2 O 2 migration and oxidation at the anode, resulting in 3 times higher H 2 O 2 concentration in the cathodic chamber compared with the EP process. The k obs for the degradation of electron-deficient compounds was enhanced by 2.6–3.3 times compared to the EP process, while moderate improvements were also observed for neutral (1.7×) and electron-rich (1.15×) pollutants, along with a notable reduction in EE/O. Furthermore, degradation byproducts were identified via LC-MS to propose potential degradation pathways, and their toxicity was assessed. These findings demonstrate that the M/EP process offers a promising strategy for the degradation of trace organic micropollutants from water.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Luyao Shi,Qinyuan Yu,Ziqi Guo,Xuedong Wei
The composite electrocatalyst of Ni(OH)₂@Fe-BDC@ Fe 3 O 4 /NF was successfully prepared. • The Ni(OH)₂@Fe-BDC heterostructure and dispersed Fe 3 O 4 nanoparticles optimize electron transfer pathways. • It is outstanding catalyst with the overpotential of 149 mV at 10 mA·cm⁻². • It has durable OER life with nearly 100 h under initial 110 mA·cm −2 . • It possesses equally excellent HER and overall water splitting performance. Metal-organic frameworks (MOFs) have gradually become highly promising electrocatalytic materials applied in the reaction of oxygen evolution (OER), thanks to their extraordinarily high specific surface area, adjustable pore structure as well as ample redox active sites. However, their practical applications are hindered by intrinsically low electrical conductivity and inadequate cycling stability. The present research introduces a brand-new Ni(OH) 2 @Fe-BDC@Fe 3 O 4 /NF nanocomposite electrocatalyst that was successfully prepared via a stepwise solvothermal method on a Ni foam (NF) support. Systematic structural characterizations confirmed that Ni(OH) 2 nanosheets in the composite exists as a mixture structure of honeycomb-like and flower-cluster-like, which uniformly anchored at the surface of Fe-BDC@Fe 3 O 4 /NF. Moreover, the coexistence of Ni(OH) 2 , Fe-BDC and Fe 3 O 4 three phases was verified in the composite. And Fe 3 O 4 nanoparticles are evenly dispersed in Fe-BDC crystal nanolayers. Electrochemical tests in 1 mol/L KOH alkaline electrolyte demonstrated that the Ni(OH) 2 @Fe-BDC@Fe 3 O 4 /NF composite exhibited superior OER catalytic activity and complete hydrolysis performance compared with the single-component Ni(OH) 2 /NF and Fe-BDC@Fe 3 O 4 /NF, delivering an overpotential as low as 149 mV under a current density of 10 mA·cm −2 , alongside a full water decomposition voltage of 1.53 V at 50 mA·cm −2 . The improved performance stemmed from the strong interfacial electronic interaction between Ni(OH) 2 and Fe-BDC@Fe 3 O 4 , which induced a negative shift in the binding energies of Ni 2p and Fe 2p, increased the interfacial charge density, reduced the charge transfer resistance (Rct = 0.8 Ω) and enlarged the electrochemical specific surface area (ECSA). In addition, the composite showed excellent long-term durability, with only 8.30% activity decay following 100 h of non-stop chronoamperometry testing under initial current density of about 110 mA·cm −2 . Structural evolution analysis after the stability test revealed that the Fe 3 O 4 phase underwent reductive decomposition and in-situ reconstruction with Ni(OH) 2 to form amorphous Ni- Fe oxyhydroxide, which served as the real active sites. This research offers a feasible approach for the structural design of iron-based MOF composite electrocatalysts, deepens the understanding of the role of interfacial synergetic mechanism between metal hydroxides and MOFs in improving OER performance, and offers experimental evidence for the advancement of high-performance non-noble metal electrocatalysts applied in water electrolysis. Download: Download high-res image (202KB) Download: Download full-size image
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JOURNAL OF MOLECULAR STRUCTURE
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2026
·
IF 4.9
Di-Ming Chen,Yu-Ting Shi,Xue-Jing Zhang,Shao-Ming Fang
A robust Al-MOF built from octanuclear [Al 8 (μ 2 -OH) 8 (COO) 12 ] clusters with oxygen-rich 1D channels has been prepared. • It exhibits a high C₂H₆ uptake of 147.6 cm 3 /g and an IAST selectivity of 1.69 for equimolar C 2 H 6 /C 2 H 4 at 298 K and 1 bar. • The separation potential (ΔQ = 1.42 mmol/g) outperforms many reported Al-MOFs, reflecting a balanced capacity–selectivity trade-off. • Combined GCMC, DFT, and MD simulations reveal that multiple C–H···O contacts and greater charge transfer govern the ethane preference. The separation of ethane (C 2 H 6 ) from ethylene (C 2 H 4 ) represents a critically important yet highly challenging process in the petrochemical industry, as these two hydrocarbons possess nearly identical molecular sizes and boiling points. In this work, we report the C 2 H 6 adsorption and separation performance of a three-dimensional aluminum-based metal–organic framework (Al-MOF) constructed from octanuclear aluminum clusters and a tricarboxylate linker, featuring one-dimensional channels decorated with abundant strongly electronegative oxygen atoms originating from coordinated formate groups and μ 3 -OH moieties. The presence of these electron-rich oxygen sites creates a polar pore environment that establishes multiple C–H···O short interactions with C 2 H 6 molecules, thereby imparting a distinct recognition preference toward the paraffin over the olefin. Upon activation, the material exhibits a C 2 H 6 adsorption capacity of 147.6 cm 3 /g at 298 K and 1 bar. The ideal adsorbed solution theory (IAST) selectivity for an C 2 H 6 /C 2 H 4 (10/90) mixture reaches 1.69 at 298 K and 1 bar. Furthermore, the separation potential (Δ Q ), which integrates both adsorption capacity and selectivity, is determined to be 1.42 mmol/g, indicating a well-balanced performance profile. The different adsorption performance of 1a toward C 2 H 6 /C 2 H 4 was thoroughly studied via a combination of GCMC, DFT and MD calculations, which demonstrates that deliberate introduction of electron-rich oxygen functionalities into the pore walls of Al-MOFs represents an effective strategy for enhancing ethane-selective adsorption, positioning the present material as a competitive candidate for energy-efficient ethylene purification. Graphical -Synopsis A robust Al-MOF with octanuclear clusters and oxygen-rich pore walls was synthesized for C 2 H 6 /C 2 H 4 separation. It exhibits preferential C₂H₆ adsorption (147.6 cm 3 /g at 298 K, 1 bar), an IAST selectivity of 1.69 for equimolar mixtures, and a separation potential of 1.42 mmol/g. Combined GCMC, DFT, and MD simulations reveal that stronger C–H···O hydrogen bonding and greater charge difference lead to a more favorable host–guest interaction energy (–1.34 vs. –1.27 eV) for ethane. This work demonstrates that engineering electronegative oxygen sites in Al-MOFs is an effective strategy for energy-efficient ethylene purification. Graphical -Pictogram Download: Download high-res image (322KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yingxia Wei,Zhangwei Li,Farhat Nosheen,Xueyan Wu,Rui Xue,Xingyun Li,Yan Lv,Jixi Guo,Dianzeng Jia
Direct seawater electrolysis for hydrogen production faces significant challenges, particularly regarding stability due to chlorine corrosion and oxidation. Herein, we present an earth-abundant alkaline seawater oxidation electrocatalyst (CO 3 2− -Co(OH) 2 @FeOOH) capable of sustained electrolysis for 5000 h without a significant attenuation at 1 A cm −2 , achieving 100% oxygen Faradaic efficiency. This multilayer electrode, featuring an amorphous FeOOH coating on crystalline cobalt carbonate hydroxide, not only generates a CoFe (oxy)hydroxide active layer but also effectively inhibits the release of CO 3 2− into the electrolyte during the reconstruction process. The synergistic effect of CO 3 2− and the distinct structure contributes to the catalyst's high activity, selectivity, and corrosion resistance. The constructed Pt/C/NF||CO 3 2− -Co(OH) 2 @FeOOH electrochemical cell achieves seawater electrolysis of 500 mA cm −2 at 1.80 V cell voltage, resulting in a power consumption of only 4.30 (kWh m −3 H 2 ). The voltage of the anion exchange membrane electrolyzer remains stable after 600 h of continuous operation at 500 mA cm −2 . The calculated gasoline-equivalent (GGE) per gallon of H 2 is as low as $0.96. This work emphasizes the synergistic effect of multilayer electrodes and anions. and provides a potential catalyst for commercialization.
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