Journal of the Taiwan Institute of Chemical Engineers最新文献_第9页

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 : 2026-04-01 Epub 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

Effect of transition metals (Co, Ni, Fe) on methanol selective catalytic oxidation performance of CeMOy mixed oxide catalysts 过渡金属（Co, Ni, Fe）对CeMOy混合氧化物催化剂甲醇选择性催化氧化性能的影响

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-04-01 Epub Date: 2025-12-08 DOI: 10.1016/j.jtice.2025.106565

Junhao Jing , Zhitao Han , Liangzheng Lin , Sihan Yin , Tingjun Liu , Chuanqiu Gao , You Tian , Dong Ma

Background

Methanol selective catalytic oxidation (CH₃OH-SCO) is an effective technology for CH₃OH removal. However, the development of catalysts with excellent stability, cost-effectiveness, and high activity at low temperatures remains a major challenge in reducing unburned methanol emissions from methanol-fueled engines.

Methods

In this study, CeMO_y (M = Co, Ni, Fe) mixed oxide catalysts were synthesized via the sol-gel method and characterized by XRD, XPS, EPR, H₂-TPR, O₂-TPD, CO₂-TPD, and in-situ DRIFTS to investigate the influence of transition metals on CH₃OH-SCO performance.

Significant findings

Catalytic activity tests demonstrated that the CeCoO_y catalyst exhibited the best performance, achieving 90 % methanol conversion at 173 °C and maintaining complete conversion without detectable byproducts over a broad temperature range (200–450 °C). Furthermore, the CeCoO_y catalyst showed excellent stability and sulfur resistance. Characterization analyses revealed that its superior catalytic performance was attributed to the enhanced interfacial effect between CeO₂ and Co₃O₄. In-situ DRIFTS analysis confirmed that methanol oxidation followed the Mars-van Krevelen (MvK) mechanism. This study clarified the role of different transition metals in modulating oxygen vacancies, oxygen species, and basic sites in CeMO_y catalysts, providing guidance for the design of efficient and low-cost mixed oxide catalysts.

甲醇选择性催化氧化（CH3OH- sco）是一种有效的脱除CH3OH的技术。然而，开发具有优异稳定性、成本效益和低温高活性的催化剂仍然是减少甲醇燃料发动机未燃烧甲醇排放的主要挑战。方法采用溶胶-凝胶法制备了CeMOy （M = Co, Ni, Fe）混合氧化物催化剂，并采用XRD、XPS、EPR、H2-TPR、O2-TPD、CO2-TPD和原位漂移等手段对催化剂进行了表征，研究过渡金属对CH3OH-SCO性能的影响。催化活性测试表明，CeCoOy催化剂表现出最好的性能，在173°C时达到90%的甲醇转化率，并且在200-450°C的宽温度范围内保持完全转化而无可检测的副产物。此外，该催化剂还具有良好的稳定性和抗硫性能。表征分析表明，其优异的催化性能归因于CeO2与Co3O4之间的界面效应增强。原位漂移分析证实甲醇氧化遵循火星-范-克雷文（MvK）机制。本研究阐明了不同过渡金属对CeMOy催化剂中氧空位、氧种类和碱基的调节作用，为设计高效、低成本的混合氧化物催化剂提供指导。

{"title":"Effect of transition metals (Co, Ni, Fe) on methanol selective catalytic oxidation performance of CeMOy mixed oxide catalysts","authors":"Junhao Jing , Zhitao Han , Liangzheng Lin , Sihan Yin , Tingjun Liu , Chuanqiu Gao , You Tian , Dong Ma","doi":"10.1016/j.jtice.2025.106565","DOIUrl":"10.1016/j.jtice.2025.106565","url":null,"abstract":"<div><h3>Background</h3><div>Methanol selective catalytic oxidation (CH<sub>3</sub>OH-SCO) is an effective technology for CH<sub>3</sub>OH removal. However, the development of catalysts with excellent stability, cost-effectiveness, and high activity at low temperatures remains a major challenge in reducing unburned methanol emissions from methanol-fueled engines.</div></div><div><h3>Methods</h3><div>In this study, CeMO<em><sub>y</sub></em> (<em>M</em> = Co, Ni, Fe) mixed oxide catalysts were synthesized via the sol-gel method and characterized by XRD, XPS, EPR, H<sub>2</sub>-TPR, O<sub>2</sub>-TPD, CO<sub>2</sub>-TPD, and in-situ DRIFTS to investigate the influence of transition metals on CH<sub>3</sub>OH-SCO performance.</div></div><div><h3>Significant findings</h3><div>Catalytic activity tests demonstrated that the CeCoO<em><sub>y</sub></em> catalyst exhibited the best performance, achieving 90 % methanol conversion at 173 °C and maintaining complete conversion without detectable byproducts over a broad temperature range (200–450 °C). Furthermore, the CeCoO<em><sub>y</sub></em> catalyst showed excellent stability and sulfur resistance. Characterization analyses revealed that its superior catalytic performance was attributed to the enhanced interfacial effect between CeO<sub>2</sub> and Co<sub>3</sub>O<sub>4</sub>. In-situ DRIFTS analysis confirmed that methanol oxidation followed the Mars-van Krevelen (MvK) mechanism. This study clarified the role of different transition metals in modulating oxygen vacancies, oxygen species, and basic sites in CeMO<em><sub>y</sub></em> catalysts, providing guidance for the design of efficient and low-cost mixed oxide catalysts.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"181 ","pages":"Article 106565"},"PeriodicalIF":6.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733207","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

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 : 2026-04-01 Epub 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

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 : 2026-04-01 Epub 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

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 : 2026-04-01 Epub 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

Adsorption mechanism of polyepoxysuccinic acid on the sphalerite surface and its effect on flotation separation 聚氧琥珀酸在闪锌矿表面的吸附机理及其对浮选分离的影响

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-04-01 Epub Date: 2025-11-06 DOI: 10.1016/j.jtice.2025.106518

Jiaxi Jin, Hao Lai, Yuyang Xiao, Xuemei Lu, Peilun Shen, Jinpeng Cai, Xiao Wei, Dianwen Liu

Background

This study elucidated the adsorption mechanism of polyepoxysuccinic acid (PESA) on sphalerite (ZnS) surfaces and its consequential effect on the flotation-based separation of sphalerite from chalcopyrite.

Methods

Micro-flotation experiments, contact angle measurements, adsorption behavior studies, and zeta potential analysis were conducted. Density Functional Theory (DFT) calculations, X-ray Photoelectron Spectroscopy (XPS), and Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) were employed to investigate the interaction mechanism.

Findings

PESA selectively depressed sphalerite, reducing its recovery to <4 % at pH 7 while chalcopyrite recovery remained above 91 %, facilitating efficient separation. PESA enhanced sphalerite hydrophilicity, decreasing the contact angle from 56.32° to 22.67°. Adsorption and zeta potential analyses demonstrated competitive adsorption between PESA and SBX on sphalerite, but preferential SBX adsorption on chalcopyrite. DFT revealed strong carboxyl–Zn coordination (−74.86 kJ/mol) at bridge sites, corroborated by XPS shifts in Zn 2p and enrichment of O–CO, as well as ToF-SIMS detection of PESA–Zn fragments. These findings establish PESA as an environmentally benign, selective depressant, enabling sustainable Cu–Zn separation under low-alkali conditions.

研究了聚氧琥珀酸（PESA）在闪锌矿（ZnS）表面的吸附机理及其对闪锌矿与黄铜矿浮选分离的影响。方法进行微浮选实验、接触角测定、吸附行为研究和zeta电位分析。利用密度泛函理论（DFT）计算、x射线光电子能谱（XPS）和飞行时间二次离子质谱（ToF-SIMS）研究了相互作用机理。发现spesa选择性抑制闪锌矿，在pH为7时，闪锌矿的回收率降至4%，而黄铜矿的回收率保持在91%以上，有利于高效分离。PESA增强了闪锌矿的亲水性，使接触角由56.32°减小到22.67°。吸附和zeta电位分析表明，PESA和SBX在闪锌矿上具有竞争性吸附，而SBX在黄铜矿上具有优先吸附。DFT在桥位发现了强的羧基-锌配位（- 74.86 kJ/mol），这得到了XPS Zn 2p位移和O-CO富集以及ToF-SIMS检测PESA-Zn片段的证实。这些发现表明PESA是一种环境友好的选择性抑制剂，可以在低碱条件下实现铜锌的可持续分离。

{"title":"Adsorption mechanism of polyepoxysuccinic acid on the sphalerite surface and its effect on flotation separation","authors":"Jiaxi Jin, Hao Lai, Yuyang Xiao, Xuemei Lu, Peilun Shen, Jinpeng Cai, Xiao Wei, Dianwen Liu","doi":"10.1016/j.jtice.2025.106518","DOIUrl":"10.1016/j.jtice.2025.106518","url":null,"abstract":"<div><h3>Background</h3><div>This study elucidated the adsorption mechanism of polyepoxysuccinic acid (PESA) on sphalerite (ZnS) surfaces and its consequential effect on the flotation-based separation of sphalerite from chalcopyrite.</div></div><div><h3>Methods</h3><div>Micro-flotation experiments, contact angle measurements, adsorption behavior studies, and zeta potential analysis were conducted. Density Functional Theory (DFT) calculations, X-ray Photoelectron Spectroscopy (XPS), and Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) were employed to investigate the interaction mechanism.</div></div><div><h3>Findings</h3><div>PESA selectively depressed sphalerite, reducing its recovery to <4 % at pH 7 while chalcopyrite recovery remained above 91 %, facilitating efficient separation. PESA enhanced sphalerite hydrophilicity, decreasing the contact angle from 56.32° to 22.67°. Adsorption and zeta potential analyses demonstrated competitive adsorption between PESA and SBX on sphalerite, but preferential SBX adsorption on chalcopyrite. DFT revealed strong carboxyl–Zn coordination (−74.86 kJ/mol) at bridge sites, corroborated by XPS shifts in Zn 2p and enrichment of O–C<img>O, as well as ToF-SIMS detection of PESA–Zn fragments. These findings establish PESA as an environmentally benign, selective depressant, enabling sustainable Cu–Zn separation under low-alkali conditions.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"181 ","pages":"Article 106518"},"PeriodicalIF":6.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464901","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

The dual strategy of hydroxylation modified Si-O-C bond cooperation and π-π stacking: Efficient photocatalytic degradation of tetracycline 羟基化修饰Si-O-C键配合和π-π堆积的双重策略：高效光催化降解四环素

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-04-01 Epub Date: 2025-11-12 DOI: 10.1016/j.jtice.2025.106523

Yunjing Li , Yangrui Xu , Jie Chen , Yuchen Wang , Yu Cheng , Liguang Tang , Hongping Li , Jie Jin , Xinlin Liu , Ziyang Lu

Background

Tetracycline (TC) a common antibiotic. However, its residues in the environment can cause water pollution, posing potential threats to the ecological environment and human health.

Methods

In this study, a novel BSM-PDI photocatalyst was hydrothermally synthesized by modifying perylene diimide (PDI) with bagasse-derived material (BSM) through hydrochloric acid-mediated strategy.

Significant Findings

During synthesis, surface hydroxyl groups on BSM condensed with PDI carboxyl groups, forming Si-O-C covalent bonds that enhanced stability and transformed PDI stacking from disordered J-aggregates to planar H-aggregates, strengthening π-π conjugation. Furthermore, BSM hydroxyls promoted TC adsorption via hydrogen bonding. The modified BSM-PDI demonstrated strengthened visible light absorption capacity, enhanced charge separation and transfer performance, and a more negative LUMO level, facilitating oxygen reduction to ·O₂^- for TC degradation. Under visible light, BSM-PDI achieved 62.37% TC degradation within 10 min, representing a 5.07-fold and 3.41-fold increase over unmodified PDI and N-PDI, respectively. In this study, biomass waste was used to develop new photocatalytic materials, which provided a new idea for the efficient elimination of TC residues in water.

背景：四环素是一种常见的抗生素。然而，它在环境中的残留会造成水污染，对生态环境和人类健康构成潜在威胁。方法以甘蔗酯衍生材料（BSM）为载体，通过盐酸对苝酰二亚胺（PDI）进行改性，制备了一种新型的BSM-PDI光催化剂。在合成过程中，BSM表面羟基与PDI羧基缩合，形成Si-O-C共价键，提高了PDI的稳定性，并将无序的j聚集体转化为平面h聚集体，增强了π-π共轭作用。此外，BSM羟基通过氢键促进TC吸附。改性后的BSM-PDI具有增强的可见光吸收能力，增强的电荷分离和转移性能，以及更负的LUMO水平，有利于氧还原到·O₂-用于TC降解。在可见光下，BSM-PDI在10 min内实现了62.37%的TC降解，分别比未改性的PDI和N-PDI提高了5.07倍和3.41倍。本研究利用生物质废弃物开发新型光催化材料，为高效去除水中TC残留提供了新的思路。

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引用次数: 0

Reactive Green 19–anchored poly(hexamethylene biguanide) on regenerated cellulose nanofiber membranes for durable, reusable antibacterial activity against E. coli 活性绿色19锚定聚（六亚甲基双胍）在再生纤维素纳米纤维膜上的持久，可重复使用的抗菌活性对大肠杆菌

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-04-01 Epub Date: 2025-11-12 DOI: 10.1016/j.jtice.2025.106522

Thi My Huong Dinh , Quang-Vinh Le , Yi-Hua Gao , Bing-Lan Liu , Anusorn Seubsai , Chen-Yaw Chiu , Chi-Yun Wang , Shen-Long Tsai , Kuei-Hsiang Chen , Yu-Kaung Chang

Background

Regenerated cellulose (RC) nanofiber membranes are hydrophilic and renewable yet rarely provide durable, low-leaching antibacterial activity. We use Reactive Green 19 (RG19) as a chemical anchor to immobilize polyhexamethylene biguanide (PHMB) on RC, thereby creating a contact-active surface for capturing and killing Escherichia coli without biocide release.

Methods

Cellulose acetate was hydrolyzed to RC to increase surface –OH density; RG19 was grafted to introduce sulfonate (–SO₃⁻) sites; PHMB was immobilized via electrostatic/ionic interactions. SEM, FTIR, and thermal analysis verified functionalization. Antibacterial performance was evaluated using time-kill (0–120 min) and antibacterial efficiency (AE, %). Durability (5 cycles), PHMB leaching (72 h in saline), PHMB loading, and cytocompatibility were evaluated.

Significant findings

Optimized RC–RG19–PHMB membranes achieved complete E. coli inactivation within 120 min with ∼100 % AE. PHMB immobilization capacity was 0.69 mg/g; full inhibition occurred with 0.373 mg/g. Membranes maintained full antibacterial activity over five reuse cycles and showed 8.39 % PHMB leaching after 72 h in saline, consistent with strong RG19–PHMB–RC interactions and contact-active behavior. Cytocompatibility remained high (≥ 100 % relative viability). Overall, RG19-anchored PHMB on RC yields a sustainable, reusable, non-leaching antibacterial platform applicable to wound dressings, protective fabrics, antimicrobial coatings, and water purification.

再生纤维素（RC）纳米纤维膜是亲水的和可再生的，但很少提供持久的，低浸出的抗菌活性。我们使用活性绿19 （Reactive Green 19, RG19）作为化学锚定剂将聚六亚甲基双胍（PHMB）固定在RC上，从而创造了一种不释放杀菌剂而捕获和杀死大肠杆菌的接触活性表面。方法将醋酸纤维素水解成RC，增加表面-OH密度；RG19接枝引入磺酸盐（-SO₃⁻）位点；通过静电/离子相互作用固定化PHMB。SEM， FTIR和热分析验证功能化。采用抗菌时间（0 ~ 120 min）和抗菌效率（AE, %）评价抗菌性能。耐久性（5个循环），PHMB浸出（生理盐水72小时），PHMB负载和细胞相容性进行评估。优化后的RC-RG19-PHMB膜在120分钟内实现了大肠杆菌的完全失活，AE为100%。PHMB的固定量为0.69 mg/g；0.373 mg/g时出现完全抑制。膜在5次重复使用循环中保持了充分的抗菌活性，在盐水中浸泡72 h后PHMB浸出率为8.39%，与RG19-PHMB-RC强相互作用和接触活性行为一致。细胞相容性保持较高（≥100%相对活力）。总的来说，rg19固定在RC上的PHMB产生了一个可持续的、可重复使用的、非浸出的抗菌平台，适用于伤口敷料、防护织物、抗菌涂层和水净化。

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引用次数: 0

Cationic cellulose aerogel immobilized with horseradish peroxidase for visible light-assisted degradation and detoxification of Crystal Violet dye 用辣根过氧化物酶固定化阳离子纤维素气凝胶对结晶紫染料进行可见光辅助降解和解毒

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-04-01 Epub Date: 2025-11-16 DOI: 10.1016/j.jtice.2025.106526

Hayam A. Alwabsi

Background

The persistent release of toxic dyes such as crystal violet (CV) into aquatic environments poses significant ecological and health risks due to their chemical stability, toxicity, and resistance to biodegradation.

Methodology

In this study, a novel bio-catalytic platform based on horseradish peroxidase (HRP) immobilized on a cationic cellulose-based aerogel (CATCE aerogel) was developed for the efficient and sustainable degradation of CV under visible light irradiation. Firstly, microcrystalline cellulose was cationized using 3‑chloro-2-hydroxypropyl) trimethylammonium chloride for the formation of cationic cellulose (CATCE). Secondly, CATCE-HRP aerogel was formed by mixing HRP with CATCE and followed by a lyophilization process. The finding illustrated that the CATCE aerogel exhibited a porous structure, and biocompatible matrix that enhanced enzyme stability, reusability, and catalytic efficiency.

Significant findings

The immobilized HRP exhibited superior thermal and pH stability, maintaining 79.4% activity after 28 days of storage and 58.4% activity after ten reuse cycles, significantly outperforming free HRP enzyme. Complete CV degradation (100%) was achieved within 90 min under optimized conditions (aerogel dose 0.5 g/L, CV concentration 5 ppm, pH 6, temperature 45 °C). Kinetic studies confirmed pseudo-first-order reaction behavior (k = 0.03021 min⁻¹, R² = 0.9283). Response Surface Methodology (RSM) further optimized the opertating parameters, predicting 80.06% degradation at 17.5 ppm CV under mild operational conditions. The CATCE-HRP aerogel demonstrated high operational stability, retaining 74.5% of its catalytic activity after five successive reuse cycles. Importantly, the Microtox® bioassay revealed a dramatic reduction in acute toxicity post-treatment, converting the effluent from extremely toxic to non-toxic and biocompatible status. These findings underscore the potential of CATCE-HRP aerogel as a robust, eco-friendly, and scalable solution for advanced wastewater treatment, contributing a novel strategy for mitigating dye pollution in industrial effluents.

结晶紫（CV）等有毒染料因其化学稳定性、毒性和抗生物降解性而持续释放到水生环境中，对生态和健康造成重大风险。本研究以阳离子纤维素气凝胶（CATCE气凝胶）固定化辣根过氧化物酶（HRP）为载体，建立了一种新型的生物催化平台，用于在可见光照射下高效、可持续地降解CV。首先，用3 -氯-2-羟丙基三甲基氯化铵对微晶纤维素进行阳离子化，形成阳离子纤维素（CATCE）。其次，将HRP与CATCE混合形成CATCE-HRP气凝胶，然后进行冻干过程。研究结果表明，CATCE气凝胶具有多孔结构和生物相容性基质，可提高酶的稳定性、可重复使用性和催化效率。结果表明：固定化后的HRP表现出较好的热稳定性和pH稳定性，贮存28天后保持79.4%的活性，重复使用10次后保持58.4%的活性，明显优于游离的HRP酶。在最佳条件下（气凝胶用量0.5 g/L， CV浓度5 ppm， pH 6，温度45℃），90 min内可完全降解CV（100%）。动力学研究证实了伪一级反应的行为（k = 0.03021分钟⁻¹，R²= 0.9283）。响应面法（RSM）进一步优化了操作参数，预测在17.5 ppm CV下，在温和的操作条件下，降解率为80.06%。CATCE-HRP气凝胶表现出很高的操作稳定性，在连续5次重复使用循环后仍保持74.5%的催化活性。重要的是，Microtox®生物测定显示处理后急性毒性显著降低，将废水从剧毒转化为无毒和生物相容性状态。这些发现强调了CATCE-HRP气凝胶作为一种强大的、环保的、可扩展的高级废水处理解决方案的潜力，为减轻工业废水中的染料污染提供了一种新的策略。

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引用次数: 0

Engineered miniature CRISPR activation system promotes dodecanedioic acid production in Candida viswanathii 工程微型CRISPR激活系统促进viswanathii念珠菌十二烷二酸的产生

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-04-01 Epub Date: 2025-12-04 DOI: 10.1016/j.jtice.2025.106548

Nam Ngoc Pham , Chih-Hsuan Chien , Chin-Wei Chang, Yu-Chen Hu

Background

Dodecanedioic acid (DDA) is a valuable monomer with broad industrial applications. The yeast Candida viswanathii can convert dodecane into 12-carbon DDA, making it an attractive host for metabolic engineering toward sustainable production. A recently developed miniature dCasMINI protein, when fused with the VPR activator, enables efficient CRISPR activation (CRISPRa) in mammalian cells, thereby simplifying gene cloning and advancing gene therapy applications. However, its potential for metabolic engineering in yeast has yet to be explored.

Methods

We reconstituted the dCasMINI system in C. viswanathii and optimized it by modifying nuclear localization signals, sgRNA design, promoters and transcriptional activators. The redesigned system was applied to activate various endogenous genes. The impact of activating different transporter genes on DDA production was evaluated.

Significant findings

The native dCasMINI-VPR system impaired C. viswanathii growth and failed to induce gene expression. By tuning design elements and replacing VPR with another yeast activator (Med2), we established a new dCasMINI-Med2 system that enabled robust activation of both constitutive and inducible genes while minimizing growth defects. Using this system, activation of transporter genes STL1_4 and HST6 enhanced DDA titers by 13–16 %. This study repurposes dCasMINI-based CRISPRa in C. viswanathii for metabolic engineering. The optimized dCasMINI-Med2 platform expands the CRISPRa toolbox for yeasts and demonstrates that transporter regulation can alleviate metabolic bottlenecks and improve DDA biosynthesis.

十二烷二酸（DDA）是一种具有广泛工业应用价值的单体。viswanathii念珠菌可以将十二烷转化为12碳DDA，使其成为可持续生产的代谢工程的一个有吸引力的宿主。最近开发的一种微型dCasMINI蛋白，当与VPR激活因子融合时，可以在哺乳动物细胞中有效激活CRISPR (CRISPRa)，从而简化基因克隆和推进基因治疗应用。然而，它在酵母代谢工程方面的潜力还有待探索。方法通过核定位信号、sgRNA设计、启动子和转录激活子的修饰，重构了C. viswanathii dCasMINI系统，并对其进行了优化。重新设计的系统被用于激活各种内源基因。评估了激活不同转运基因对DDA产生的影响。重要发现：天然dCasMINI-VPR系统抑制了C. viswanathii的生长，并不能诱导基因表达。通过调整设计元素并用另一种酵母激活剂（Med2）替代VPR，我们建立了一个新的dCasMINI-Med2系统，该系统能够在最大限度地减少生长缺陷的同时激活构成基因和诱导基因。利用该系统，激活转运基因STL1_4和HST6可使DDA滴度提高13 - 16%。本研究将基于dcasmini的CRISPRa用于C. viswanathii的代谢工程。优化后的dCasMINI-Med2平台扩展了酵母的CRISPRa工具箱，并证明了转运体调控可以缓解代谢瓶颈，提高DDA的生物合成。

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引用次数: 0