Journal of the Taiwan Institute of Chemical Engineers最新文献_第10页

Emission reduction characteristics of N2O from low COD/N ratio sewage treated with different potential biocathodes 不同电位生物阴极处理低COD/N比污水N2O的减排特性

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-27 DOI: 10.1016/j.jtice.2025.106534

Yuling Fu , Jing Tian , Yucheng Zhang , Qingyun Wang , Jingran Zhang , Huimin Zhang , Chuqiao Wang , Shan Huang

Background

Nitrous oxide (N₂O) is a byproduct of biological nitrogen removal and a potent greenhouse gas. While biocathodes enhance denitrification performance, systematic studies on their N₂O emission characteristics remain limited. Furthermore, the majority of urban sewage has a low chemical oxygen demand/nitrogen (COD/N) ratio (< 5) that requires additional carbon sources, producing secondary pollution and undermining the low-carbon treatment strategy.

Methods

In this study, a denitrifying biocathode system was constructed to investigate N₂O emissions under varying COD/N ratios (3, 2, and 1) and applied electric potentials (−0.4 V to 0.0 V).

Significant findings

The results demonstrated that N₂O emission factors (N₂O_ef) in the experimental group ranged from 0.51 % (−0.4 V) to 2.44 % (0.0 V), significantly lower than the control group (3.36 %). N₂O_ef decreased by 79.10 % at −0.4 V compared with 0.0 V, attributable to enhanced electron supply and complete denitrification. Under varying COD/N ratios, the N₂O_ef values in the experimental group (1.17–1.57 %) were approximately half those in the control (2.29–4.80 %), confirming the dominant role of applied potential compared with the COD/N ratio. High-throughput sequencing revealed enrichment in N₂O-reducing genera (Truepera and Ignavibacterium) under low potentials, while PICRUSt2 predicted the upregulation of key functional genes such as narGHI, nirK, nirS, norC, and nosZ, particularly nosZ (9.7-fold increase at −0.4 V). In addition, this study proposed a strategy for N₂O abatement using biocathodes, providing theoretical support for their application in mitigating N₂O emissions.

一氧化二氮（N2O）是生物脱氮的副产物，也是一种强效的温室气体。虽然生物阴极提高了脱氮性能，但对其N2O排放特性的系统研究仍然有限。此外，大多数城市污水的化学需氧量/氮（COD/N）比（< 5）较低，需要额外的碳源，产生二次污染，不利于低碳处理策略。方法构建反硝化生物阴极系统，研究不同COD/N比（3、2、1）和外加电势（−0.4 V ~ 0.0 V）下N2O排放情况。结果表明：实验组N2O排放因子（N2Oef）在0.51% (- 0.4 V) ~ 2.44% （0.0 V）之间，显著低于对照组（3.36%）；与0.0 V相比，−0.4 V下N2Oef下降了79.10%，这是由于电子供应增强和完全脱氮。在不同COD/N条件下，试验组的N2Oef值（1.17 ~ 1.57%）约为对照组（2.29 ~ 4.80%）的一半，说明施用电位对COD/N的主导作用。高通量测序显示，在低电位下，n2o还原属（Truepera和Ignavibacterium）富集，PICRUSt2预测了narGHI、nirK、nirS、norC和nosZ等关键功能基因的上调，特别是nosZ（−0.4 V时增加9.7倍）。此外，本研究还提出了利用生物阴极减少N2O排放的策略，为其在减少N2O排放中的应用提供了理论支持。

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引用次数: 0

Precise regulation of structural properties in manganese ferrite nanocatalysts for enhanced ozone decomposition 锰铁氧体纳米催化剂结构性能的精确调控，以增强臭氧分解

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-26 DOI: 10.1016/j.jtice.2025.106540

Xiaotong Li , Yitong Fu , Zhuxu Li , Guoqing Rui , Lei Zhong , Zhen Li , Wei Liu , Songjian Zhao

Background

Manganese ferrite (MnFe₂O₄) is a promising alternative to precious metal catalyst, yet its application in ozone decomposition (deO₃) remains underexplored.

Methods

Herein, a series of MnFe₂O₄ nanocatalysts with different structural properties were precisely designed.

Significant findings

The optimal MnFe₂O₄ prepared via alkaline co-precipitation method (abbreviated as MFO-AP) catalyst, exhibits superior ozone decomposition performance, which can be attributed to its unique amorphous structure, nanoscale characteristics, enhanced redox properties, abundant oxygen vacancies, and Lewis acid sites. In particular, Lewis acid sites promote ozone activation by coordinating with O₃ oxygen atoms, enhancing ozone decomposition. At a weight hourly space velocities (WHSV) of 600 L·g⁻¹·h⁻¹, the decomposition rate of 50 ppm ozone in dry air reaches 99%, and there is still a decomposition efficiency of 98% after 10 h. Furthermore, under 60% relative humidity (RH), the atomic oxygen from ozone dissociation preferentially occupies the Mn unsaturated sites due to confinement and spatial separation, enhancing ozone decomposition efficiency, while water molecules preferentially bind to the Fe unsaturated sites, improving moisture resistance.

锰铁氧体（MnFe2O4）是一种很有前途的贵金属催化剂替代品，但其在臭氧分解（deO3）中的应用仍未得到充分的探索。方法设计了一系列具有不同结构性质的MnFe2O4纳米催化剂。通过碱性共沉淀法制备的MnFe2O4（简称MFO-AP）催化剂具有优异的臭氧分解性能，这可归功于其独特的无定形结构、纳米级特性、增强的氧化还原性能、丰富的氧空位和Lewis酸位点。特别是，路易斯酸位点通过与O₃氧原子配合，促进臭氧活化，促进臭氧分解。当质量小时空速（WHSV）为600 L·g−1·h−1时，50 ppm臭氧在干燥空气中的分解率可达99%，10 h后的分解效率仍可达98%。此外，在60%相对湿度（RH）下，臭氧解离产生的氧原子由于约束和空间分离，优先占据Mn不饱和位点，提高了臭氧的分解效率，而水分子则优先结合Fe不饱和位点。提高防潮性。

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引用次数: 0

Novel g-C3N4/diatomite composite catalysts loaded with cobalt and iron for efficient peroxomonosulfate activation in N-Methylpyrrolidone degradation 负载钴和铁的新型g-C3N4/硅藻土复合催化剂在n -甲基吡咯烷酮降解中的高效过氧单硫酸盐活化

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-25 DOI: 10.1016/j.jtice.2025.106539

Jiaxi Chen, Yanyan Liu, Qian Feng, Runnan Zhang, Yuying Ye, Wanqi Ou

Background

N-Methylpyrrolidone (NMP) is a prevalent organic pollutant in the wastewater generated during the lithium-battery manufacturing process. Given the ecological risks associated with its release into the environment, an efficient and environmentally friendly degradation technology is currently required to meet the demand for the degradation of NMP in water.

Methods

The g-C₃N₄/diatomite/CoFe₂O₄ (CNDE-CF) composite catalysts prepared in this study employed a combination of impregnation-calcination and solvent-heat treatment processes. Efficient degradation of NMP was achieved using the obtained catalyst-activated persulfate (PMS), which was characterised in terms of morphology and physicochemical properties. In addition, the effects of the factors on the degradation efficacy of the CNDE-CF/PMS system were investigated by varying the catalyst dosage, initial pH, initial NMP concentration, NMP/PMS concentration ratio, and anion content in solution, respectively, under controlled variables.

Significant findings

Based on the results of these experiments, it was found that the degradation of NMP by the CNDE-CF/PMS system reached 99 % degradation within 60 min (k_obs = 0.0715 min^-1). Quenching experiments and in situ electron paramagnetic resonance (EPR) spectroscopy techniques revealed the involvement of four reactive oxygen species in the degradation mechanism, with sulphate radicals (SO₄^·-) and singlet oxygen (¹O₂) playing a larger role. In addition, the abundant pores of diatomite, the electrons provided by graphitic phase carbon nitride and the redox cycling reaction between Co²⁺/Co³⁺ and Fe²⁺/Fe³⁺ are the mechanisms by which this efficient degradation reaction occurs. Finally, experiments demonstrating the stability and wide applicability of the material were carried out to provide an experimental basis for the possibilities of this material in future practical applications.

甲基吡咯烷酮（NMP）是锂电池生产过程中产生的废水中普遍存在的有机污染物。鉴于其释放到环境中的生态风险，目前需要一种高效、环保的降解技术来满足水中NMP的降解需求。方法采用浸渍-焙烧和溶剂-热处理相结合的工艺制备了g-C3N4/硅藻土/CoFe2O4 （CNDE-CF）复合催化剂。使用所获得的催化剂活化过硫酸盐（PMS）实现了NMP的有效降解，其形态和物理化学性质进行了表征。此外，在可控变量下，通过改变催化剂用量、初始pH、初始NMP浓度、NMP/PMS浓度比、溶液中阴离子含量，考察了各因素对CNDE-CF/PMS体系降解效果的影响。根据实验结果，CNDE-CF/PMS系统对NMP的降解在60 min内达到99% （kobs = 0.0715 min-1）。淬火实验和原位电子顺磁共振（EPR）光谱技术揭示了四种活性氧参与了降解机理，其中硫酸盐自由基（SO4·-）和单线态氧（1O2）发挥了较大的作用。此外，硅藻土丰富的孔隙、石墨相氮化碳提供的电子以及Co2+/Co3+与Fe2+/Fe3+之间的氧化还原循环反应是这种高效降解反应发生的机制。最后通过实验证明了该材料的稳定性和广泛的适用性，为该材料在未来实际应用中的可能性提供了实验基础。

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引用次数: 0

Mechanistic insights into the impact of sinter ore basicity on softening and melting behavior 烧结矿碱度对软化和熔化行为影响的机理研究

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-24 DOI: 10.1016/j.jtice.2025.106536

Wen-chien Tsai , Yu-ning Chiu , Kai-chun Chang , Jia-shyan Shiau , Ke-miao Lu , Tsung-yen Huang , Shan-wen Du , Ker-chang Hsieh , Hao-long Chen , Shih-kang Lin

Background

Traditional empirical indices, such as T₁₀ (softening onset) and T₄₀ (softening completion), are widely used to evaluate how sinter basicity (B₂) influences the softening and melting (S&M) behavior in blast furnace ironmaking. Although simple and intuitive, these indices show weak correlation with the underlying physicochemical mechanisms and microstructural evolution.

Methods

This study employs a systematic analytical framework integrating a dynamically controlled atmosphere, microstructural characterization, exhaust gas analysis, and thermodynamic modeling. By comparing sinter ore with different B₂, we evaluate the limitations of empirical indices and provide a mechanistic understanding of B₂ effects on S&M behavior.

Significant Finding

Comparing typical (B₂ = 1.93) and high-basicity sinter (B₂ = 2.36), we find that increased B₂ lowers the initial FeO liquefaction temperature, promoting earlier, more abundant liquid formation. This accelerates the direct reduction (FeO + C → Fe + CO) and results in greater shrinkage within the 1100−1250 °C range. Extensive early liquid formation fills pore spaces, intensifying softening at lower temperatures. Additionally, high-B₂ sinter lowers the slag dripping temperature (1399 °C vs. 1456 °C), facilitating early FeO liquid drainage and suppressing FeO coarsening in 1330–1430 °C range. These findings indicate that increasing sinter basicity enhances S&M behavior, improves gas permeability, and optimizes reduction reactions in blast furnace operations.

传统的经验指标，如T10（软化开始）和T40（软化完成），被广泛用于评价烧结矿碱度（B2）如何影响高炉炼铁过程中的软化和熔化（S&；M）行为。这些指标虽然简单直观，但与潜在的物理化学机制和微观结构演化的相关性较弱。方法本研究采用了一个系统的分析框架，包括动态控制气氛、微观结构表征、废气分析和热力学建模。通过比较不同B2的烧结矿，我们评估了经验指标的局限性，并提供了B2对S&；M行为影响的机理理解。对比典型烧结矿（B2 = 1.93）和高碱度烧结矿（B2 = 2.36），我们发现B2的增加降低了FeO的初始液化温度，促进了更早、更丰富的液态形成。这加速了直接还原（FeO + C→Fe + CO），并在1100 ~ 1250℃范围内产生更大的收缩率。大量的早期液体地层填满孔隙空间，在较低温度下加剧软化。此外，高b2烧结矿降低了渣滴温度（1399℃vs 1456℃），有利于FeO液体的早期析出，抑制了1330 ~ 1430℃范围内FeO的粗化。这些发现表明，增加烧结矿碱度可以增强S&；M行为，改善气体渗透性，并优化高炉操作中的还原反应。

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引用次数: 0

Corrigendum to “Effective retention of inorganic Selenium ions (Se (VI) and Se (IV)) using novel sodalite structures from muscovite; characterization and mechanism” [Journal of the Taiwan Institute of Chemical Engineers 120 (2021)] “使用来自白云母的新型钠云石结构有效保留无机硒离子（Se （VI）和Se (IV)）”的勘误；[台湾化学工程学会学报120 (2021)]

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-23 DOI: 10.1016/j.jtice.2025.106530

Soha M. Albukhari , Mohamed Abdel Salam , Mostafa R. Abukhadra

引用次数: 0

Precise tuning of PVDF-HFP membrane structures via near-field electrospinning: Dual applications in oil-water separation and membrane emulsification 近场静电纺丝技术对PVDF-HFP膜结构的精确调谐：在油水分离和膜乳化中的双重应用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-23 DOI: 10.1016/j.jtice.2025.106535

Ronggui Wang , JunTong Meng , Xinya Wang , Tiantian Li , Ruirui Cao , Wei Zhang , Mingxing Chen

Background

Precise regulation of membrane pore structure for the treatment of oily wastewater has become an urgent problem. This study introduces an effective and facile method to fabricate membranes with controllable structure and highlights their potential as innovative choices for oil-water separation and premixed membrane emulsification.

Methods

This study prepared Polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) membranes with controllable pore structure via near-field electrospinning (NFES) technology and the effects of the number of layers, inscribed circular diameter and pore geometry on structure and properties were investigated, respectively.

Significant Findings

The results showed that when the number of layers was 6, the inscribed circular diameter of square pores was 0.2 mm, the obtained membranes exhibited excellent oil-water separation performance with a high separation efficiency of 96.77 % and a separation flux of 1511 L∙m^-2∙h^-1. Compared with the obtained membranes with other pore geometries, the obtained membrane with square pores exhibited excellent oil-water separation and premixed membrane emulsification performance. Additionally, oil-water separation performance had no discernible decay after 500 cycle tests, underscoring their exceptional stability. During the premixed membrane emulsification process, water-in-oil emulsions prepared by the obtained membranes presented a relatively narrow particle size distribution and exhibited excellent stability.

背景含油废水处理中膜孔结构的精确调控已成为一个亟待解决的问题。本研究介绍了一种有效且简单的制备可控结构膜的方法，并强调了其作为油水分离和预混合膜乳化的创新选择的潜力。方法采用近场静电纺丝（NFES）技术制备了孔结构可控的聚偏氟乙烯-共六氟丙烯（PVDF-HFP）膜，考察了膜层数、内切圆直径和孔几何形状对膜结构和性能的影响。结果表明：当膜层数为6层，方形孔内切圆直径为0.2 mm时，所制得的膜具有优异的油水分离性能，分离效率高达96.77%，分离通量为1511 L∙m-2∙h-1。与其他孔结构的膜相比，方形孔结构的膜具有良好的油水分离和预混膜乳化性能。此外，经过500次循环测试，油水分离性能没有明显的衰减，强调了它们卓越的稳定性。在预混合膜乳化过程中，所得膜制备的油包水乳液粒径分布较窄，稳定性较好。

{"title":"Precise tuning of PVDF-HFP membrane structures via near-field electrospinning: Dual applications in oil-water separation and membrane emulsification","authors":"Ronggui Wang , JunTong Meng , Xinya Wang , Tiantian Li , Ruirui Cao , Wei Zhang , Mingxing Chen","doi":"10.1016/j.jtice.2025.106535","DOIUrl":"10.1016/j.jtice.2025.106535","url":null,"abstract":"<div><h3>Background</h3><div>Precise regulation of membrane pore structure for the treatment of oily wastewater has become an urgent problem. This study introduces an effective and facile method to fabricate membranes with controllable structure and highlights their potential as innovative choices for oil-water separation and premixed membrane emulsification.</div></div><div><h3>Methods</h3><div>This study prepared Polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) membranes with controllable pore structure via near-field electrospinning (NFES) technology and the effects of the number of layers, inscribed circular diameter and pore geometry on structure and properties were investigated, respectively.</div></div><div><h3>Significant Findings</h3><div>The results showed that when the number of layers was 6, the inscribed circular diameter of square pores was 0.2 mm, the obtained membranes exhibited excellent oil-water separation performance with a high separation efficiency of 96.77 % and a separation flux of 1511 L∙m<sup>-2</sup>∙h<sup>-1</sup>. Compared with the obtained membranes with other pore geometries, the obtained membrane with square pores exhibited excellent oil-water separation and premixed membrane emulsification performance. Additionally, oil-water separation performance had no discernible decay after 500 cycle tests, underscoring their exceptional stability. During the premixed membrane emulsification process, water-in-oil emulsions prepared by the obtained membranes presented a relatively narrow particle size distribution and exhibited excellent stability.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"181 ","pages":"Article 106535"},"PeriodicalIF":6.3,"publicationDate":"2025-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selenium and cobalt co-doped carbon catalyst to activate peroxymonosulfate for efficient tetracycline hydrochloride degradation: Primary role of non-radicals 硒和钴共掺杂碳催化剂激活过氧单硫酸盐高效降解盐酸四环素：非自由基的主要作用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-22 DOI: 10.1016/j.jtice.2025.106532

Dianrui Yang , Yidan Liu , Ruiying Zhu , Hong Ma , Lejing Zhou , Jinping Liang , Xiaobo Gong

Background

Peroxymonosulfate (PMS)-based advanced oxidation process has been proved to be an effective method for antibiotic treatment, however, the activation of PMS should be improved for practical applications.

Methods

A selenium-cobalt co-doped carbon composite material (CoSe@C) was successfully synthesized through pyrolyzing of ZIF-67 with selenium powder. The CoSe@C was used to degrade tetracycline hydrochloride (TC).

Significant findings

Under optimized conditions of 0.05 g/L CoSe@C, 0.1 g/L PMS and pH = 4.8 at 25 °C, 89.1% TC removal was achieved within 60 min. Characterization confirmed that cobalt provides abundant active sites, while selenium doping enhances graphitization and electron transfer capacity. The non-radical pathway played the primary role, with high valent cobalt and electron transfer contributing the mainly TC degradation in CoSe@C/PMS system. Two possible degradation pathways were proposed in CoSe@C/PMS system, and the most intermediates have lower toxicity than initial TC. The catalyst also exhibited good reusability. This work demonstrates the potential of MOF-derived Se-doped catalysts in advanced oxidation processes for antibiotic-contaminated wastewater treatment.

基于过氧单硫酸根（PMS）的高级氧化工艺已被证明是一种有效的抗生素治疗方法，但为了实际应用，PMS的活化还有待改进。方法采用硒粉热解ZIF-67，成功合成硒钴共掺杂碳复合材料（CoSe@C）。用CoSe@C降解盐酸四环素（TC）。在0.05 g/L CoSe@C, 0.1 g/L PMS, pH = 4.8, 25℃条件下，60 min内可达到89.1%的TC去除率。表征证实钴提供了丰富的活性位点，而硒的掺杂增强了石墨化和电子转移能力。在CoSe@C/PMS体系中，非自由基途径起主要作用，高价钴和电子转移是降解TC的主要途径。在CoSe@C/PMS体系中提出了两种可能的降解途径，大多数中间体的毒性低于初始TC。催化剂具有良好的可重复使用性。这项工作证明了mof衍生的硒掺杂催化剂在抗生素污染废水处理的高级氧化过程中的潜力。

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引用次数: 0

Molecular engineering of Co ion–imprinted sites on metal–organic frameworks and facile photodeposition for the selective recovery and upcycling of Co(II) 金属-有机骨架上Co离子印迹位点的分子工程及快速光沉积对Co（II）的选择性回收和升级利用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-20 DOI: 10.1016/j.jtice.2025.106527

Xin Liu , Ruixue Hu , Shiran Zhu , Xiangyu Liu , Yu Fang , Yihang Li , Wei Wei

Background

The demand for adsorption technologies that facilitate the recovery and upcycling of the valuable metallic element, Co, has been increasing. The recovery of Co from wastewater using metal–organic frameworks (MOFs), which are promising adsorbents, is considerably limited because of the lack of selective adsorption sites. Furthermore, research on the upcycling of Co remains inadequate.

Methods

Herein, we develop an integrated strategy combining ion imprinting modification and photodeposition for the selective recovery and upcycling of divalent Co ions (Co(II)) using MOF adsorbents.

Significant findings

First, Co ion–imprinted sites are constructed on a typical MOF adsorbent, MIL-125 (labeled CoIP-ML), via molecular engineering using glycylglycine. Compared with the original aminated MIL-125, CoIP-ML exhibits a superior performance, achieving the maximum adsorption capacity (q_m = 218.6 mg/g) and selectivity (selective coefficient k_{Co(II)/Ni(II)} = 3.61) for Co(II) via the chelation of Schiff base groups and adsorption at terminal carboxyl groups. The Co(II) adsorbed on CoIP-ML is upcycled through a facile photodeposition process into Co oxides, which function as a Fenton-like catalyst. The optimal catalyst effectively activates peroxymonosulfate for the removal of chloroquine diphosphate and chlortetracycline hydrochloride, achieving the upcycling of Co(II). This study presents a unique MOF-functionalization paradigm.

对吸附技术的需求越来越大，吸附技术可以促进有价金属元素Co的回收和升级利用。金属有机框架（MOFs）是一种很有前途的吸附剂，但由于缺乏选择性吸附位点，其从废水中回收Co的能力受到很大限制。此外，对Co的升级回收研究还不足。方法采用离子印迹改性和光沉积相结合的方法，利用MOF吸附剂对二价Co离子（Co(II)）进行选择性回收和升级利用。首先，通过甘氨酸分子工程，在典型的MOF吸附剂MIL-125（标记为CoIP-ML）上构建了Co离子印迹位点。与原胺化MIL-125相比，CoIP-ML表现出更优异的吸附性能，通过席夫碱基的螯合和末端羧基的吸附，对Co（II）达到了最大的吸附量（qm = 218.6 mg/g）和选择性系数(kCo（II)/Ni(II) = 3.61）。吸附在CoIP-ML上的Co（II）通过简单的光沉积过程升级为Co氧化物，Co氧化物作为Fenton-like催化剂。优化后的催化剂能有效活化过氧单硫酸根脱除二磷酸氯喹和盐酸氯四环素，实现Co（II）的升级回收。本研究提出了一种独特的mof功能化范式。

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引用次数: 0

Covalent bridging strategy with multiscale silicon architectures for polyurethane composites: Enhanced interfacial compatibility and long-term durability 聚氨酯复合材料多尺度硅结构共价桥接策略：增强界面相容性和长期耐久性

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-19 DOI: 10.1016/j.jtice.2025.106531

Qian Chen , Lili Guo , Shihui Chen , Xiaoyun Li , Junwei Wang

Background

Polyurethane (PU) composites face critical limitations in industrial applications due to weak interfacial adhesion and polarity mismatch between conventional fillers and polymer matrices. This study proposes a multiscale interface engineering approach to mitigate these limitations.

Methods

The silica (SiO₂) particle-modified graphene oxide (SKG) via silane coupling agent was prepared, and the corresponding composites were fabricated by incorporating various SKG ratios (0-5 wt‰) into PU through melt blending. The SAXS analysis was conducted to characterize the microphase separation, and mechanical tests were utilized, especially aging measurements were carried out to explore the durability performance.

Significant findings

The incorporation of SKG at extremely low loading level led to a remarkable improvement in mechanical properties, with tensile strength increasing by 37.1% from 25.3 MPa to 34.7 MPa, alongside a high tear resistance of 78.4 kN/m. More importantly, aging tests demonstrated outstanding durability, retaining over 80% of the original tensile strength even under simulated 48-month service conditions. This strategy establishes a versatile and scalable pathway for developing high-performance elastomers that combine strength with long-term durability in concise way, showing promise for shock-absorbing applications.

聚氨酯（PU）复合材料在工业应用中面临着严重的限制，因为传统填料和聚合物基体之间的界面附着力弱和极性不匹配。本研究提出了一种多尺度界面工程方法来减轻这些限制。方法通过硅烷偶联剂制备二氧化硅（SiO2）颗粒改性氧化石墨烯（SKG），并通过熔融共混将不同配比（0 ~ 5 wt‰）的SKG掺入PU中制备相应的复合材料。利用SAXS分析表征了微相分离，并利用力学试验，特别是老化试验来探索其耐久性性能。在极低的加载水平下，SKG的加入使材料的力学性能得到了显著改善，抗拉强度从25.3 MPa提高到34.7 MPa，提高了37.1%，抗撕裂性达到78.4 kN/m。更重要的是，老化试验显示出出色的耐久性，即使在模拟48个月的使用条件下，也能保持80%以上的原始抗拉强度。该策略为开发高性能弹性体建立了一种通用且可扩展的途径，该弹性体以简洁的方式将强度与长期耐用性结合起来，显示了减震应用的前景。

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引用次数: 0

A spindle-shaped phosphotungstic acid loaded amidoximated natural bamboo strip for extracting uranium 载磷钨酸的纺锤形偕胺肟化天然竹条提铀

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-11-19 DOI: 10.1016/j.jtice.2025.106520

Yan Feng, Yuxi Li, Shengxuan Gao, Yue Tao, Ying Zhang

Background

Inorganic materials with high O/N content for Uranium Extraction from Seawater (UES) show fast-adsorption rate, but practical applications are limited by their easy dispersion, difficult recovery, and poor selectivity. Therefore, inspired by the macroscopic large-area molding, antibacterial properties, and hierarchical porous microstructure of bamboo strips (BS), a nanoscale spindle-shaped phosphotungstic acid (PTA) loaded amidoximated BS (AOBS) as the inorganic/organic composite material with high O/N content is designed and applied to extracting uranium.

Methods

Under the effects of the hydrogen bonding crosslinking, the protonation process of -NH₂, the physical limitations of PEG molecular chains, and others, a nanoscale spindle-shaped PTA loaded fibrous AOBS (PW₁₂AOBS) is successfully synthesized by chemical cross-linking and hydrothermal methods.

Significant Findings

PW₁₂AOBS has the super-hydrophilic surface and ultra-fast infiltration rate, so that it exhibits an excellent antibacterial performance and a super-fast adsorption rate. When the contact time is 5 mins, the adsorption capacity is 195.6 mg·g⁻¹, and a removal rate of uranium is 78.2 %. The highest removal rate of uranium is 82.6 %, and the adsorption capacity reaches 343.6 μg·g⁻¹ in simulated seawater. The terminal OH/-COOH and bridging W=O from PW₁₂AOBS synchronously act as the active sites for extracting uranium.

高O/N含量的有机材料对海水提铀的吸附速度快，但易分散、难回收、选择性差，限制了其实际应用。因此，受竹条（BS）宏观大面积成型、抗菌性能和分层多孔结构的启发，设计了一种纳米级纺锤形磷钨酸（PTA）负载偕胺肟化BS （AOBS）作为高O/N含量的无机/有机复合材料，并将其应用于铀提取。方法在氢键交联、-NH2质子化过程、PEG分子链物理限制等因素的影响下，采用化学交联和水热法成功合成了纳米级纺锤形PTA负载的纤维AOBS （PW12AOBS）。spw12aobs具有超亲水性表面和超快的渗透速率，从而表现出优异的抗菌性能和超快的吸附速率。当接触时间为5 min时，铀的吸附量为195.6 mg·g−1，铀的去除率为78.2%。模拟海水中铀的最高去除率为82.6%，吸附量达343.6 μg·g−1。PW12AOBS的末端OH/-COOH和桥接W=O同时作为提取铀的活性位点。

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引用次数: 0