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PBAT-based biodegradable triboelectric nanogenerators for sustainability in energy, environment, and health 基于pbat的可生物降解摩擦电纳米发电机在能源、环境和健康方面的可持续性
Pub Date : 2026-01-07 DOI: 10.1016/j.hybadv.2026.100602
Kariyappa Gowda Guddenahalli Shivanna , Vishnu Kadabahalli Thammannagowda , Smitha Ankanahalli Shankaregowda , Prashantha Kalappa
The increasing demand for portable and sustainable power sources has accelerated research into triboelectric nanogenerators (TENGs), which convert mechanical energy from the environment into electrical energy. However, the widespread use of non-degradable materials in conventional TENGs raises serious environmental concerns. This review highlights the potential of biodegradable poly(butylene adipate-co-terephthalate) (PBAT) as a triboelectric material for the development of eco-friendly TENGs. Various fabrication techniques, including solvent casting and electrospinning, are discussed for the preparation of PBAT-based TENGs. According to current literature, the incorporation of nanomaterials into the PBAT matrix significantly enhances output performance, mechanical properties, and environmental compatibility. Additionally, this review explores the applications of PBAT-based TENGs in energy harvesting, self-powered sensors, biodegradable electronics, and environmental monitoring, emphasizing PBAT's contribution to sustainable TENG technology. The primary focus of this review is to explore solvent-free methods such as compression molding and 3D printing for fabricating PBAT films, which are then utilized in TENG device development.
对便携式和可持续能源日益增长的需求加速了对摩擦电纳米发电机(TENGs)的研究,它将环境中的机械能转化为电能。然而,不可降解材料在传统teng中的广泛使用引发了严重的环境问题。本文综述了可生物降解的聚己二酸丁二酯(PBAT)作为一种摩擦电材料在开发生态友好型teng材料方面的潜力。讨论了溶剂铸造和静电纺丝等制备pbat基TENGs的方法。根据目前的文献,在PBAT基质中加入纳米材料可以显著提高输出性能、机械性能和环境相容性。此外,本文还探讨了基于PBAT的TENG在能量收集、自供电传感器、生物可降解电子和环境监测等方面的应用,强调了PBAT对可持续TENG技术的贡献。本综述的主要重点是探索无溶剂方法,如压缩成型和3D打印,用于制造PBAT薄膜,然后用于TENG设备的开发。
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引用次数: 0
Sustainable functionalization of biodegradable materials for mosquito repellent extiles: A review of sources, application, and research directions 生物可降解驱蚊织物可持续功能化材料的来源、应用及研究方向
Pub Date : 2026-01-05 DOI: 10.1016/j.hybadv.2026.100600
Md. Tareque Rahaman , Md. Mubashwir Moshwan
Growing concerns over chemical toxicity and environmental impact have driven the development of sustainable mosquito-repellent textiles using biodegradable natural materials and nanotechnology. This review analyzes recent advancements in sustainable textile innovations, focusing on renewable raw materials, advanced encapsulation methods, key challenges, and future opportunities. Key findings suggest that biopolymers such as chitosan, cellulose, and alginate have highlighted significant performance as carriers for natural repellents like citronella, neem, and eucalyptus oils. Encapsulation techniques, including liposomes, polymeric nanoparticles, spray drying, and electrospinning, significantly enhance the stability, wash durability, and controlled release of active agents. Surface-level applications with zinc oxide, silver, and titanium dioxide nanoparticles provide multifunctional benefits, such as mosquito repellency, antimicrobial activity, and UV protection, without declining fabric breathability or comfort. The application of biodegradable materials encourages circular economy principles by enabling recyclability or biodegradability, thereby minimizing environmental challenges. Despite promising laboratory-scale results, challenges remain in scaling up production, ensuring regulatory compliance, and addressing the long-term ecological risks of nanomaterials. Future research should focus on green synthesis methods, optimizing bio-nano systems for improved performance, and ensuring safe, cost-effective functionalization into commercial textile manufacturing.
对化学毒性和环境影响的日益关注推动了使用可生物降解的天然材料和纳米技术的可持续驱蚊纺织品的发展。本文分析了可持续纺织品创新的最新进展,重点介绍了可再生原料、先进的封装方法、主要挑战和未来机遇。主要研究结果表明,生物聚合物,如壳聚糖、纤维素和海藻酸盐,作为天然驱蚊剂(如香茅、楝树和桉树油)的载体,具有显著的性能。包封技术,包括脂质体、聚合纳米颗粒、喷雾干燥和静电纺丝,显著提高了活性剂的稳定性、洗涤耐久性和控释。氧化锌、银和二氧化钛纳米颗粒的表面应用提供了多功能的好处,如驱蚊、抗菌活性和紫外线防护,而不会降低织物的透气性或舒适性。生物可降解材料的应用通过实现可回收性或生物可降解性来鼓励循环经济原则,从而最大限度地减少环境挑战。尽管在实验室规模上取得了有希望的成果,但在扩大生产、确保遵守法规以及解决纳米材料的长期生态风险方面仍然存在挑战。未来的研究应该集中在绿色合成方法,优化生物纳米系统以提高性能,并确保安全,经济有效地功能化到商业纺织品制造中。
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引用次数: 0
Hybrid synthesis strategies of NiO nanostructures for photocatalytic dye removal from contaminated water sources: A critical review 用于光催化脱除污染水源染料的NiO纳米结构杂化合成策略:综述
Pub Date : 2026-01-05 DOI: 10.1016/j.hybadv.2026.100601
Rajendran Geetha
The continued release of synthetic dyes by the textile and allied industries is of great ecological and public-health relevance, because, in most cases, the traditional infrastructures of waste water treatment do not curb the complex chromophoric molecules. NiO NPs have also been found to be one of the most effective remediation agents due to their large surface area, chemical stability, and strong photocatalytic capabilities. This is a critical review of the current advances in chemical, green, and hybrid synthesis protocols, which expound how particle size, morphology, and surface-functionalisation dictate the efficacy of adsorption and the photocatalytic degradation pathways. The special focus is given to doped NiO systems and NiO based composites, which are characterized by an increased charge separation, modulation of the band-gap, and the production of reactive oxygen species. Comparative studies have shown how optimised NiO nanostructures can have removal efficiencies of more than 90–99 % of primary classes of dyes with visible or solar light. The review also outlines the current issues such as nanoparticle aggregation, low recoverability, and possible ecotoxicological effects, and suggests future research directions that could be useful to allow scalable, cost-effective, and sustainable application of NiO-based materials in industrial wastewater purification. Comprehensively, this synthesis provides a comprehensive mechanism structure that guides rational development of next generation NiO nanomaterials to be effectively used in the removal of dyes.
纺织和相关工业持续释放合成染料具有重大的生态和公共卫生意义,因为在大多数情况下,传统的废水处理基础设施不能抑制复杂的显色分子。NiO NPs也被发现是最有效的修复剂之一,因为它们具有大的表面积,化学稳定性和强大的光催化能力。这是对化学、绿色和混合合成方案的当前进展的重要回顾,其中阐述了颗粒大小、形态和表面功能化如何决定吸附效果和光催化降解途径。特别关注掺杂NiO体系和NiO基复合材料,其特点是增加了电荷分离,调制了带隙,并产生了活性氧。比较研究表明,优化后的NiO纳米结构可以在可见光或太阳光下对初级染料的去除效率超过90 - 99%。综述还概述了当前存在的问题,如纳米颗粒聚集、低可恢复性和可能的生态毒理学效应,并提出了未来的研究方向,这些方向可能有助于实现镍基材料在工业废水净化中的可扩展、低成本和可持续应用。综合而言,该合成提供了一个全面的机制结构,指导下一代NiO纳米材料的合理开发,有效地用于染料的去除。
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引用次数: 0
Comparative analysis of a hybrid KNN–SVM model versus individual ML techniques for solar power forecasting in Bangladesh 混合KNN-SVM模型与单独ML技术在孟加拉国太阳能预测的比较分析
Pub Date : 2026-01-04 DOI: 10.1016/j.hybadv.2025.100598
Md.Mushfiq Us Salehin
Proper power system operation in areas that have a high degree of climatic variability including Bangladesh requires proper solar power forecasting. This paper analyzes a cascade hybrid KNN–SVM model to predict solar power per hour and their performance is compared to standalone K-Nearest Neighbors (KNN), Support Vector Machine (SVM), and Long Short-Term Memory (LSTM) models. Under the proposed method, the KNN algorithm is first used to determine the local data neighborhoods, and the second step is the localized regression on an SVM with a radial basis function (RBF) kernel. Root Mean Square Error (RMSE) is used to evaluate model performance on a series of forecasting targets. Hourly Total Global Solar Radiation (HTGSR) and Hourly Total Power Generation (HTPEG) are the least RMSE values of 0.0059 and 0.0058 respectively, which are the lowest for the hybrid KNN–SVM model. Although LSTM works well in situations where there are long temporal dependencies to be learned, the hybrid approach offers a more balanced trade off between instance-based learning and margin optimization, and thus is especially useful in situations where there are high short-term variations. These findings justify the feasibility of scaled-up solar energy integration into the power grid in Bangladesh and it will also help in the sustainable energy planning.
在包括孟加拉国在内的气候高度变化的地区,适当的电力系统运行需要适当的太阳能预测。本文分析了级联混合KNN - SVM模型来预测每小时太阳能发电量,并将其性能与独立的k -近邻(KNN)、支持向量机(SVM)和长短期记忆(LSTM)模型进行了比较。该方法首先利用KNN算法确定局部数据邻域,然后利用径向基函数(RBF)核对支持向量机进行局部回归。使用均方根误差(RMSE)来评价模型在一系列预测目标上的性能。每小时全球太阳总辐射(HTGSR)和每小时总发电量(HTPEG)的RMSE值最小,分别为0.0059和0.0058,在KNN-SVM混合模型中RMSE值最低。尽管LSTM在需要学习长时间依赖性的情况下工作得很好,但混合方法在基于实例的学习和边际优化之间提供了更平衡的权衡,因此在存在高短期变化的情况下特别有用。这些发现证明了在孟加拉国大规模将太阳能并入电网的可行性,它也将有助于可持续能源规划。
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引用次数: 0
Sustainable multifunctional dyeing of nylon with Babool (Acacia nilotica) bark extract: Enhancing color metrics, fabric performance, UV protection, and antibacterial activity 巴布尔树皮提取物对尼龙的可持续多功能染色:提高颜色指标、织物性能、防紫外线和抗菌活性
Pub Date : 2026-01-02 DOI: 10.1016/j.hybadv.2026.100599
Priti Sarker , Md. Tareque Rahaman , Md. Abdullah Al Mamun , Umme Aiman Liza , Mubarak A. Khan , Mohammad Mamun Hossain
There is an increasing demand for environment-friendly methods of textile coloration. On this basis, there is rising emphasis on biodegradable natural dyes. Natural dyes are perceived to provide functionality beyond mere appearance. This research investigates the multifaceted sustainable dyeing of nylon using the aqueous extract of Babool bark (Acacia nilotica). It has focused its attention on chromatic parameters, fabric properties, the UV protection factor, and antibacterial activity. The variables associated with the process of dyeing included time, temperature, pH, and Material: Liquor (M: L) ratio, which have been systematically optimized. Optimum conditions identified at 100 °C, pH 4.8, 60 min, and an M:L ratio of 1:30. In such conditions, nylon fabric showed improved coloration with greater K/S values, CIELAB color coordinates, and good shade repeatability. SEM studies revealed even deposition of tannins and natural colorants, while increased temperature resulted in increased fabric surface roughness and degradation due to thermal effects. The FTIR revealed good hydrogen bonding interactions between the dye and nylon polymer chains. The colored textile demonstrated good UV protection factor, which improved from 12.1 to 87.62 UPF values, meeting specific demands for high UV protective application in functional textile products for protective and healthcare apparel due to its phenolic compounds found in Babool bark. Even in the absence of diffusion inhibition zones, surface bacterial resistances were demonstrated in Bacillus spp. and P. pseudomonas. The dyed fabric has good color fastness properties to washing, perspiration, and rubbing tests, though light fastness was moderate, which in turn could be improved through effective mordanting process. Mechanical strength and air-permeability values also stayed within acceptable ranges. The result clearly indicates that Babool bark extract is considered to be an efficient and sustainable natural dye that is preferable for achieving appropriate textile coloration, effective UV protection, and good color fastness properties of dyed nylon fabric.
对环保型纺织品染色方法的需求日益增加。在此基础上,人们越来越重视可生物降解的天然染料。天然染料被认为具有超越外观的功能。本研究探讨了利用巴布尔树皮的水萃取物对尼龙进行多方面的可持续染色。重点研究了颜色参数、织物性能、防紫外线系数和抗菌活性。影响染色过程的变量包括时间、温度、pH、料液比(M: L)等,并对其进行了系统优化。最佳条件为100°C, pH 4.8, 60 min, M:L比为1:30。在这种条件下,尼龙织物的显色性得到改善,具有更高的K/S值、CIELAB颜色坐标和良好的色度可重复性。扫描电镜研究表明,即使单宁和天然着色剂沉积,当温度升高时,由于热效应导致织物表面粗糙度增加和降解。红外光谱显示染料与尼龙聚合物链之间存在良好的氢键相互作用。彩色纺织品显示出良好的紫外线防护系数,从12.1提高到87.62 UPF值,满足防护和保健服装等功能性纺织品的高紫外线防护应用的特定要求,因为它含有巴布尔树皮中的酚类化合物。即使在没有扩散抑制带的情况下,芽孢杆菌和假单胞菌也表现出表面细菌耐药性。染色织物的耐水洗、耐汗、耐摩擦等色牢度均较好,但耐光牢度一般,可通过有效的染整工艺改善。机械强度和透气性值也保持在可接受的范围内。结果表明,巴布尔树皮提取物是一种高效、可持续的天然染料,可为染色尼龙织物提供良好的染色效果、防紫外线效果和色牢度。
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引用次数: 0
Experimental and theoretical investigation of the degradation inhibition of Mg in the presence of carbonyl containing Mg battery boosters 羰基含镁电池助推剂对镁的降解抑制实验与理论研究
Pub Date : 2025-12-22 DOI: 10.1016/j.hybadv.2025.100597
Alexander I. Ikeuba , Christopher U. Sonde , Imabasi I. Tom , Fredrick C. Asogwa , Chigoziri N. Njoku , Fidelis E. Abeng , Eno E. Ebenso
This study evaluates the corrosion inhibition performance of selected carbonyl-based compounds; oxalic acid, sorbitol, EDTA, sodium glycolate, and sodium salicylate on magnesium exposed to 0.5 % NaCl solution using hydrogen evolution measurements over the temperature range 303–333 K. The inhibitors exhibited varying degrees of protection, with sorbitol and sodium salicylate demonstrating the highest inhibition efficiencies studied across the temperatures. Thermodynamic parameters such as entropy and enthalpy indicate endothermic and spontaneous adsorption behavior. Calculated Gibbs free energy values confirm the feasibility of inhibitor–surface interactions. Density functional theory (DFT) analysis provided insight into molecular reactivity, revealing that inhibitors with higher HOMO energies, lower HOMO–LUMO energy gaps, greater softness, and more favorable chemical potentials exhibited superior inhibition efficiency. The correlation between experimental data and quantum descriptors establishes electron-donating capability and molecular reactivity as key factors governing adsorption strength. Overall, the combined experimental and theoretical results highlight sorbitol and sodium salicylate as promising corrosion inhibitors for magnesium, contributing valuable understanding toward the development of Mg-based systems for energy and structural applications. However, sorbitol emerged with the highest inhibition efficiency (IE) and Utilization Efficiency (UE) suggesting that there may exist a relation between utilization efficiency and inhibition efficiency depending on molecular structure and electronic properties of the compound.
本研究评价了选定的羰基化合物的缓蚀性能;草酸、山梨醇、EDTA、乙醇酸钠和水杨酸钠在镁上暴露于0.5% NaCl溶液中,在303-333 K的温度范围内使用析氢测量。抑制剂表现出不同程度的保护作用,山梨醇和水杨酸钠在不同温度下表现出最高的抑制效率。热力学参数如熵和焓表示吸热和自发吸附行为。计算得到的吉布斯自由能值证实了缓蚀剂-表面相互作用的可行性。密度泛函理论(DFT)分析揭示了分子反应性,揭示了更高HOMO能量、更低HOMO - lumo能隙、更柔软、更有利化学势的抑制剂具有更好的抑制效率。实验数据和量子描述符之间的相关性确定了给电子能力和分子反应性是控制吸附强度的关键因素。总的来说,结合实验和理论结果强调山梨醇和水杨酸钠是很有前途的镁缓蚀剂,为开发用于能源和结构应用的镁基体系提供了有价值的理解。而山梨糖醇的抑制效率(IE)和利用效率(UE)最高,表明利用效率和抑制效率之间可能存在依赖于化合物的分子结构和电子性质的关系。
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引用次数: 0
Eco-friendly dyeing of polyester with natural colorants extracted from jackfruit wood shavings: Insights into fabric performance, chromatic parameters, and flame retardancy 利用从菠萝蜜木屑中提取的天然着色剂对涤纶进行环保染色:洞察织物性能、色彩参数和阻燃性
Pub Date : 2025-12-17 DOI: 10.1016/j.hybadv.2025.100596
Md. Abdullah Al Mamun, Md Khalilur Rahman, Md. Tareque Rahaman, Arnob Dhar Pranta
Growing environmental concerns associated with petroleum-based synthetic dyes have intensified the demand of sustainable natural colorants for textile applications. This research evaluates jackfruit (Artocarpus heterophyllus) wood shavings, an underutilized agricultural byproduct, as a renewable dye source for polyester dyeing, including its dual significance in waste valorization and environmentally sustainable processing. The colorant was extracted through alkaline extraction at 100 °C for 60 min, and polyester fabrics were subsequently dyed under systematically varied dyeing process parameters, including time (20–120 min), temperature (80–160 °C), and pH (4, 7, 9). FTIR spectroscopy revealed the presence of characteristic polyester bands alongside additional absorption features, indicative of interactions between dye constituents and the fiber surface. Dyeing induced measurable modifications in fabric performance, including reduced air permeability attributable to surface deposition and limited moisture transfer as evidenced by near-zero bottom-surface wetting and a negative one-way transport index. Chromatic assessment demonstrated that dyeing parameters significantly influenced chromatic parameters, with maximum color strength reaching (K/S) 10.39. Samples dyed at 140 °C for 100 min exhibited enhanced flame retardancy (29.1 s) and excellent wash, rubbing, light, and perspiration fastness (ratings 4–5). Acidic pH improved wash fastness, whereas neutral pH yielded superior rubbing, light, and perspiration resistance. The findings establish jackfruit wood shavings as a promising sustainable colorant capable of imparting functional and aesthetic value to polyester textiles.
与石油基合成染料相关的日益增长的环境问题加剧了对可持续天然着色剂用于纺织品的需求。本研究评估了菠萝蜜(Artocarpus heterophyllus)木屑作为一种未充分利用的农业副产品,作为聚酯染色的可再生染料来源,包括其在废物增值和环境可持续处理方面的双重意义。在100°C下碱性萃取60 min提取着色剂,然后在不同的染色工艺参数下对涤纶织物进行染色,包括时间(20-120 min)、温度(80-160°C)和pH(4,7,9)。FTIR光谱揭示了特征聚酯带的存在以及额外的吸收特征,表明染料成分与纤维表面之间的相互作用。染色对织物性能产生了可测量的改变,包括由于表面沉积而导致的透气性降低和有限的水分转移,这可以通过接近零的底面润湿和负的单向传输指数来证明。色度评价表明染色参数对色度参数影响显著,最大色强达到(K/S) 10.39。在140°C下染色100分钟的样品表现出增强的阻燃性(29.1 s)和优异的洗涤,摩擦,光和排汗牢度(等级4-5)。酸性酸碱度提高了洗涤牢度,而中性酸碱度产生了优异的摩擦、耐光性和耐汗性。研究结果表明,菠萝蜜木屑是一种很有前途的可持续着色剂,能够赋予聚酯纺织品功能和美学价值。
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引用次数: 0
The modelling and design optimisation of sawdust, garnet waste, and palm oil fuel ash-based hybrid asphalt binders using response surface methodology 建模和设计优化锯末,石榴石废料,棕榈油燃料灰基混合沥青粘合剂使用响应面方法
Pub Date : 2025-12-17 DOI: 10.1016/j.hybadv.2025.100595
Wan Noor Hin Mior Sani , Ramadhansyah Putra Jaya , Indra Mawardi , Zaid Hazim Al-Saffar , Haryati Yaacob
This study evaluated the rheological characteristics of a hybrid asphalt binder integrating sawdust, garnet waste, and palm oil fuel ash (POFA). Approximately 0 %, 3 %, 6 %, and 9 % of hybrid materials were incorporated into the unaged and rolling thin film oven (RTFO) hybrid asphalt binders were assessed. Furthermore, the central composite design (CCD) in the response surface methodology (RSM) were utilised to evaluate the effects of hybrid asphalt binder content and temperature on the rheological behaviour of the hybrid asphalt binders. Consequently, the hybrid asphalt binders showed dosage-dependent rheological behaviour, with the 6 % formulation exhibiting notably lower phase angle (δ) and complex shear modulus (G∗) than the control binder, particularly in the unaged state, while other dosages displayed more variable responses across the tested temperatures. The RTFO hybrid asphalt binders also revealed reduced stiffness across all temperatures compared to the control asphalt. Given that high correlation coefficients (R2) were demonstrated by the G∗ (<0.97) and δ (<0.93), a substantial relationship between the model values and the experimental data was identified. The optimal parameters (temperature and percentage) for the hybrid materials were also discovered to be 62.9 °C and 5.78 % using the numerical optimisation and the quadratic model. Considering that each response possessed a percentage error below 5 %, the effectiveness and the validation of the model were successfully verified in this study.
本研究评估了一种由锯末、石榴石废料和棕榈油燃料灰(POFA)组成的混合沥青粘合剂的流变特性。在未老化和滚动薄膜烤箱(RTFO)混合沥青粘合剂中分别加入了大约0%、3%、6%和9%的混合材料。此外,利用响应面法(RSM)中的中心复合设计(CCD)来评估混合沥青粘结剂含量和温度对混合沥青粘结剂流变行为的影响。因此,混合沥青粘结剂表现出与剂量相关的流变行为,6%配方的相角(δ)和复杂剪切模量(G∗)明显低于对照粘结剂,特别是在未老化状态下,而其他剂量的混合沥青粘结剂在测试温度下表现出更多的可变响应。与对照沥青相比,RTFO混合沥青粘合剂在所有温度下的刚度都有所降低。考虑到G∗(<0.97)和δ (<0.93)显示出高相关系数(R2),模型值与实验数据之间存在实质性关系。利用数值优化和二次模型,发现混合材料的最佳参数(温度和百分比)分别为62.9°C和5.78%。考虑到每次响应的误差在5%以下,本研究成功验证了模型的有效性和有效性。
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引用次数: 0
Co-apatite phosphate compound: High-Performance corrosion inhibition in highly aggressive HCl solution (1.0 M and 5.0 M) and biological assessment 共磷灰石磷酸盐化合物:在高腐蚀性HCl溶液(1.0 M和5.0 M)中具有高性能的缓蚀性和生物评价
Pub Date : 2025-12-11 DOI: 10.1016/j.hybadv.2025.100593
Nouhaila Ferraa , Moussa Ouakki , Mariam Barrahi , Mohammed Cherkaoui , Mounia Bennani Ziatni
In this study, a novel inorganic Co-Apatite Phosphate substituted with cobalt ions (named CCP) of formula Co2Ca6(HPO4)(PO4)5(OH) was synthesized and evaluated for its multifunctional properties, encompassing corrosion inhibition, as well as antibacterial and antifungal activities. The synthesis process was conducted following a green chemistry approach and the phosphate compound was thoroughly analyzed using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM/EDX), Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Electrochemical techniques were employed to investigate the corrosion prevention performance against carbon steel in two different hydrogen chloride acidic medium concentrations (5.0 M and 1.0 M HCl). The inhibitor demonstrates excellent performance in both mildly and highly acidic environments. In less corrosive environment of 1.0 M HCl, the inhibition efficiency is estimated to be 96.4 %, while under more corrosive 5.0 M HCl, the efficiency remains high at 90 %. In addition, biological assays revealed that the material exhibited notable antibacterial activity and antifungal effectiveness against both Gram-negative and Gram-positive. These results confirm the potentiality of CCP as a green multifunctional inhibitor effective in both harsh and microbially active environments (antimicrobial and antifungal).
在这项研究中,合成了一种新型无机钴离子取代钴离子的Co-Apatite磷酸盐(命名为CCP),其分子式为Co2Ca6(HPO4)(PO4)5(OH),并对其多功能性能进行了评价,包括缓蚀,抗菌和抗真菌活性。采用绿色化学方法进行合成,并利用扫描电子显微镜、能量色散x射线能谱(SEM/EDX)、傅里叶变换红外光谱(FTIR)和x射线衍射(XRD)对磷酸化合物进行了全面分析。采用电化学技术研究了两种不同浓度氯化氢酸性介质(5.0 M和1.0 M HCl)对碳钢的防腐性能。该抑制剂在弱酸性和强酸性环境中均表现出优异的性能。在腐蚀性较弱的1.0 M HCl环境下,缓蚀率为96.4%,而在腐蚀性较强的5.0 M HCl环境下,缓蚀率仍高达90%。此外,生物实验表明,该材料对革兰氏阴性和革兰氏阳性菌均具有显著的抗菌活性和抗真菌活性。这些结果证实了CCP作为一种绿色多功能抑制剂的潜力,在恶劣和微生物活性环境(抗菌和抗真菌)中都有效。
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引用次数: 0
Buoyancy-driven magnetohydrodynamic nanofluid flow and heat transfer in a porous cavity with an exothermic reaction governed by Arrhenius kinetics 浮力驱动的磁流体动力学纳米流体在多孔腔内的流动和传热与阿累尼乌斯动力学控制的放热反应
Pub Date : 2025-12-11 DOI: 10.1016/j.hybadv.2025.100594
M.J. Uddin , M.M. Rahman
The enhancement of heat transport in magnetohydrodynamic (MHD) nanofluid systems with exothermic chemical reactions is a growing area of interest for applications such as geothermal recovery, nuclear reactor thermal regulation, and advanced energy technologies. Despite extensive research, the complex roles of magnetic forces, nanoparticle suspensions, and chemical activity remain insufficiently clarified. This study presents a novel and comprehensive numerical analysis of buoyancy-induced magnetohydrodynamic (MHD) convection within a porous cavity filled with a CuO–water nanofluid, considering the combined influence of an external magnetic field and heat generation due to an exothermic chemical reaction. The findings offer new insights into coupled magneto-thermo-chemical transport phenomena in nanofluid-saturated porous media. The nanofluid and porous structure are modeled under the postulations of local thermal equilibrium. The derived principal transport equations are discretized and solved through a Galerkin extension of the finite element framework, which is validated against benchmark data. The simulations reveal several physical trends: thermal and velocity intensities increase significantly with higher Rayleigh numbers, resulting in larger Nusselt numbers. Quantitatively, the average Nusselt number (Num) rises by 117% with increasing Rayleigh and Peclet numbers and by 15% for nanoparticle loading ϕ=0.05. In contrast, a strong magnetic field (Ha=80), higher porosity, and ϕ=0.1 reduce Num by 52%, 42%, and 26%, respectively, highlighting the competing influences of buoyancy, magnetic damping, porous resistance, and nanoparticle loading on heat transfer. Enhanced nanoparticle loading strengthens heat transport while reducing shear stresses and overall circulation strength. A stronger magnetic field suppresses both temperature and velocity gradients, limiting flow intensity, whereas its orientation plays a negligible role in frictional effects. Reaction-driven heating, characterized by the Frank–Kamenetskii parameter, substantially amplifies both velocity and heat transfer rates. At higher Péclet numbers, convective transport dominates over diffusive contributions. Furthermore, the porosity of the medium is shown to influence momentum and thermal transport, providing additional avenues for controlling flow resistance and enhancing thermal performance.
利用放热化学反应增强磁流体动力学(MHD)纳米流体系统的热传递是地热回收、核反应堆热调节和先进能源技术等应用领域日益关注的一个领域。尽管进行了广泛的研究,但磁力、纳米颗粒悬浮液和化学活性的复杂作用仍然没有得到充分的阐明。考虑到外加磁场和放热化学反应产生的热量的综合影响,本研究提出了一种新颖而全面的数值分析方法,对充满cuo -水纳米流体的多孔腔内浮力诱导磁流体动力学(MHD)对流进行了分析。这一发现为纳米流体饱和多孔介质中磁-热-化学耦合输运现象提供了新的见解。在局部热平衡假设下,对纳米流体和多孔结构进行了建模。将导出的主输运方程离散化,通过有限元框架的伽辽金扩展进行求解,并通过基准数据进行验证。模拟揭示了几个物理趋势:热强度和速度强度随着瑞利数的增加而显著增加,从而导致努塞尔数的增加。在数量上,随着瑞利数和佩莱特数的增加,平均努塞尔数(Num)增加了117%,当纳米颗粒加载φ =0.05时,平均努塞尔数(Num)增加了15%。相比之下,强磁场(Ha=80)、高孔隙率和φ =0.1分别使Num降低52%、42%和26%,突出了浮力、磁阻尼、多孔阻力和纳米颗粒负载对传热的竞争影响。纳米颗粒负载增强了热传递,同时降低了剪应力和整体循环强度。较强的磁场抑制温度和速度梯度,限制流动强度,而其方向对摩擦效应的作用可以忽略不计。反应驱动加热以Frank-Kamenetskii参数为特征,大大增加了速度和传热速率。在较高的psamclet数下,对流输运比扩散输运占主导地位。此外,介质的孔隙率会影响动量和热输运,为控制流动阻力和提高热性能提供了额外的途径。
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