ACS Sustainable Chemistry & Engineering最新文献_第9页

Ni2P/CoSe Mott–Schottky Heterointerfaces with Electron Redistribution for Alkaline Hydrogen Evolution at Ampere-Level Current Densities 具有电子重分布的Ni2P/CoSe Mott-Schottky异质界面在安培电流密度下的碱氢演化

IF 7.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-27 DOI: 10.1021/acssuschemeng.5c09260

Xuetong Wang, , , Wenwen Zheng, , , Jinjie Fang, , , Jiaxia Zhou, , , Xiaoman Tang, , , Meng Zhao, , , Haozong Zhong, , , Guojing Wang*, , , Xiaojie Li*, , and , Yuanzhi Zhu*,

Electrolytic water splitting for hydrogen production remains a significant challenge, highlighting the urgent need for high-performance and economically viable electrocatalysts for the hydrogen evolution reaction (HER). In this study, a Ni₂P/CoSe Mott–Schottky heterojunction was fabricated on carbon fiber paper (CFP), serving as an efficient HER electrocatalyst in alkaline media. The radially aligned CoSe hollow nanoneedles enable the uniform anchoring of Ni₂P quantum dots, forming tightly coupled heterointerfaces between discrete quantum domains and the conductive scaffold, thereby increasing the density of interfacial active sites. Discretely dispersed semiconducting Ni₂P on metallic CoSe induces interfacial charge polarization via quantum confinement effects, thereby generating a strong built-in electric field (BIEF) at the interface that drives electron transfer from Ni₂P to CoSe. This field promotes interfacial charge redistribution and intrinsically activates the catalytic sites. Density functional theory (DFT) calculation reveals that interfacial charge redistribution between Ni₂P and CoSe generates electron-deficient Ni sites and electron-rich Co sites, which respectively optimize H₂O adsorption/dissociation and H* adsorption, thereby enhancing the HER activity. As a result, the 2-Ni₂P/CoSe/CFP catalyst exhibits outstanding HER performance with a low overpotential of 186 mV at 1000 mA cm^–2 and <1% loss after 300 h. Using 2-Ni₂P/CoSe/CFP as the cathode, an AEM-WE device exhibits a low cell voltage of 1.74 V at 1000 mA cm^–2 and a long-term stability for 500 h.

电解水裂解制氢仍然是一个重大挑战，迫切需要高性能和经济可行的析氢反应（HER）电催化剂。本研究在碳纤维纸（CFP）上制备了Ni2P/CoSe Mott-Schottky异质结，作为碱性介质中高效的HER电催化剂。径向排列的CoSe空心纳米针能够均匀锚定Ni2P量子点，在离散量子域和导电支架之间形成紧密耦合的异质界面，从而增加界面活性位点的密度。金属CoSe上离散分散的半导体Ni2P通过量子约束效应诱导界面电荷极化，从而在界面处产生强大的内置电场（BIEF），驱动电子从Ni2P向CoSe转移。该场促进了界面电荷的重新分配，并从本质上激活了催化位点。密度泛函理论（DFT）计算表明，Ni2P和CoSe之间的界面电荷重分配产生了缺电子的Ni位点和富电子的Co位点，分别优化了H2O吸附/解离和H*吸附，从而提高了HER活性。结果表明，2-Ni2P/CoSe/CFP催化剂表现出优异的HER性能，在1000 mA cm-2时过电位为186 mV， 300 h后损耗为<；1%。使用2-Ni2P/CoSe/CFP作为阴极，AEM-WE器件在1000 mA cm-2时电池电压低至1.74 V，长期稳定性为500 h。

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引用次数: 0

Sensing of Fish Freshness Using Smart Pectin Films Incorporated with Spirulina Extract and Carbon Dots 用螺旋藻提取物和碳点混合的智能果胶膜检测鱼的新鲜度

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-27 DOI: 10.1021/acssuschemeng.5c12381

Zahra Najafi, Leyla Nesrin Kahyaoglu

Multifunctional and biodegradable smart packaging films were developed here using pectin, phycocyanin rich Spirulina (PCS) extract and citric acid derived carbon dots (CDs). The physicochemical, active and intelligent properties of the films were systematically examined as a function of CD concentration. Incorporation of CDs enhanced tensile strength from 10.88 to 17.70 MPa, increased crystallinity and thermal stability and maintained high biodegradability (above 80% mass loss after 28 days in soil). The addition of CD enhanced antioxidant activity (from 12.8% to 39.5% ABTS scavenging) and imparted concentration dependent antimicrobial activity against E. coli and S. aureus. The PCSP/CD12.5 film displayed a distinct colorimetric response to ammonia vapor, displaying a linear ΔE–NH₃ correlation (R² = 0.93) within the range of 0–50 mg N/100 g and a detection limit of 9.04 mg N/100 g, and exhibited colorimetric stability over two months of storage. In real food trials, the PCSP/CD12.5 film enabled effective visual tracking of fish freshness at 23 °C with color changes closely correlating to increases in TVB-N (from 13.3 to 36.2 mg N/100 g) and TVC (from 4.5 to 7.4 log cfu/g) during storage. These results demonstrate that PCSP/CD films effectively integrate active and intelligent functionalities thereby extending the application of pigment and protein complexes.

以果胶、富含藻蓝蛋白的螺旋藻（PCS）提取物和柠檬酸衍生碳点（CDs）为原料，研制了多功能、可生物降解的智能包装膜。系统地考察了薄膜的物理化学、活性和智能性能随CD浓度的变化。cd的加入使抗拉强度从10.88提高到17.70 MPa，提高了结晶度和热稳定性，并保持了较高的生物降解性（在土壤中28天后质量损失超过80%）。添加CD增强了抗氧化活性（ABTS清除率从12.8%提高到39.5%），并赋予了对大肠杆菌和金黄色葡萄球菌的浓度依赖性抗菌活性。PCSP/CD12.5薄膜对氨蒸汽有明显的比色响应，在0 ~ 50 mg N/100 g范围内呈ΔE-NH3线性相关（R2 = 0.93），检出限为9.04 mg N/100 g，并在2个月以上的保存时间内表现出比色稳定性。在实际食品试验中，PCSP/CD12.5薄膜能够在23°C下有效地视觉跟踪鱼的新鲜度，其颜色变化与储存期间TVB-N（从13.3到36.2 mg N/100 g）和TVC（从4.5到7.4 log cfu/g）的增加密切相关。这些结果表明，PCSP/CD薄膜有效地整合了活性和智能功能，从而扩展了色素和蛋白质复合物的应用。

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引用次数: 0

Recyclable and Reprocessable Tung Oil-Based Epoxy Resin with High Mechanical Strength 可回收再加工的高机械强度桐油基环氧树脂

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-27 DOI: 10.1021/acssuschemeng.5c10423

Yinghao Wu, Xin Zhao, Chunlei Jiao, Haigang Wang, Ming Wei, Jian Li, Yanjun Xie, Shaoliang Xiao

In recent years, extensive research has been devoted to the synthesis or modification of epoxy resins from biomass-derived feedstocks. However, realizing closed-loop recyclability, using fully renewable raw materials, and preserving key material properties remain open and persistent challenges in epoxy resin development. Herein, we propose a strategy involving the use of biomass-derived tung oil (TO) as the primary raw material and employing dynamic covalent ester-exchange chemistry to prepare a highly mechanically robust, recyclable, and reprocessable tung oil epoxy resin (ECAT-ME) vitrimer. The ECAT-ME vitrimer consists of a covalent adaptable network based on an associative mechanism, exhibiting tensile and compressive strengths of 11.87 and 17.45 MPa, respectively. Following six pulverization–melting–cooling cycles, the material retained tensile and compressive strengths of 6.99 and 8.92 MPa, respectively. This recyclable, high-performance biobased epoxy resin lays the foundation for the sustainable development of functional composites.

近年来，广泛的研究致力于从生物质原料合成或改性环氧树脂。然而，实现闭环可回收性，使用完全可再生的原材料，并保持材料的关键性能仍然是环氧树脂发展的开放和持久的挑战。在此，我们提出了一种策略，包括使用生物质衍生桐油（TO）作为主要原料，并采用动态共价酯交换化学来制备高度机械坚固，可回收和可再加工的桐油环氧树脂（ECAT-ME）聚合物。ECAT-ME聚合体是一个基于缔合机制的共价自适应网络，抗拉强度和抗压强度分别为11.87和17.45 MPa。经过6次粉碎-熔化-冷却循环后，材料的抗拉强度和抗压强度分别保持在6.99和8.92 MPa。这种可回收、高性能的生物基环氧树脂为功能复合材料的可持续发展奠定了基础。

引用次数: 0

Nanostructured Copper@Carbon Fiber Composite as an Advanced Anode Catalyst in High-Performance Aqueous Viologen Flow Batteries 纳米结构Copper@Carbon纤维复合材料作为高性能水凝胶液流电池的高级阳极催化剂

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-27 DOI: 10.1021/acssuschemeng.5c12173

Ruoqing Sun, Guanghui Zhou, Ying Liu, Haiguang Gao, Juan Xu, Jianyu Cao, Yonggang Wang

Redox flow batteries (RFBs) are a promising technology for large-scale energy storage due to their decoupled power and energy architecture, high scalability, and safety. Redox-active organic materials (ROMs) have emerged as promising candidates for RFB applications due to their molecular diversity, structural flexibility, cost effectiveness, and environmental compatibility. However, the sluggish kinetics of promising ROMs like methyl viologen (MV) on conventional carbon felt (CF) electrodes remain a critical bottleneck, necessitating the development of highly active electrocatalysts. Herein, we report the development of a novel nanostructured copper-on-carbon-felt composite (Cu@CF) electrode fabricated via a facile electrodeposition method incorporating organic additives. The Cu@CF electrode significantly enhances the intrinsic kinetic rate constant (k⁰) of the MV redox reaction by approximately 3-fold compared to that of pristine CF, demonstrating its superior intrinsic catalytic capability. An MV//N,N,N-2,2,6,6-heptamethylpiperidinyl-oxy-4-ammonium (TEMPTMA) aqueous organic redox flow battery (AORFB) full cell assembled using Cu@CF as the anode catalyst demonstrates substantially enhanced performance metrics, including remarkably low area-specific resistance (ASR), higher discharge capacity (85.1% utilization at 30 mA cm^–2), a maximum power density of 235.4 mW cm^–2 (46% higher than the CF cell), and excellent energy efficiency (EE) of 79.7% at 80 mA cm^–2. Furthermore, this Cu@CF cell exhibits superior long-term stability over 500 cycles, maintaining an average EE of 78.52% and effectively suppressing undesirable side reactions like dimerization and disproportionation of MV^+• (the reduced state of MV²⁺). This work establishes Cu@CF as a high-performance, durable, and low-cost electrocatalyst, offering a practical strategy to advance viologen-based AORFB technology.

氧化还原液流电池（rfb）由于其解耦的功率和能量结构、高可扩展性和安全性，是一种很有前途的大规模储能技术。氧化还原活性有机材料（ROMs）由于其分子多样性、结构灵活性、成本效益和环境相容性而成为RFB应用的有希望的候选者。然而，像甲基紫素（MV）这样有前途的rom在传统碳毡（CF）电极上的缓慢动力学仍然是一个关键的瓶颈，需要开发高活性的电催化剂。在此，我们报告了一种新型纳米结构碳上铜毡复合材料（Cu@CF）电极的开发，该电极通过结合有机添加剂的简易电沉积方法制造。Cu@CF电极显著提高了MV氧化还原反应的本然动力学速率常数k0，比原始CF提高了约3倍，显示了其优越的本然催化能力。使用Cu@CF作为阳极催化剂组装的MV//N，N,N-2,2,6,6-七甲基piperidyl -氧-4-铵（TEMPTMA）水相有机氧化还原液流电池（AORFB）全电池表现出显著增强的性能指标，包括极低的面积比电阻（ASR），更高的放电容量（30 mA cm-2时利用率为85.1%），最大功率密度为235.4 mW cm-2（比CF电池高46%），以及80 mA cm-2时79.7%的优异能效（EE）。此外，这种Cu@CF电池在500次循环中表现出优异的长期稳定性，保持78.52%的平均EE，并有效抑制MV+•（MV2+的还原状态）的二聚化和歧化等不良副反应。这项工作确立了Cu@CF作为一种高性能、耐用、低成本的电催化剂，为推进基于viologen的AORFB技术提供了一种实用的策略。

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引用次数: 0

Chemical Upcycling of Waste Chlorinated Plastics into α,ω-Dienes via Consecutive Dehydrochlorination-Hydrogenation with HCl Trapping and Metathesis 氯化废塑料连续脱氢-加氢- HCl捕集-复分解化学回收制备α，ω-二烯

IF 7.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-26 DOI: 10.1021/acssuschemeng.5c11948

Christophe Vos, , , Galahad O’Rourke, , and , Dirk De Vos*,

The chemical recycling of chlorinated plastics is industrially challenging due to the release of corrosive HCl and char formation. In this work, a novel upcycling route for chlorinated plastics, including polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and chlorinated polyethylene (CPE), is developed. When ZnCl₂-catalyzed dehydrochlorination (DHC) is combined with tandem DHC-hydrogenation, using a homogeneous Ru hydrogenation catalyst and metal oxides as a HCl trap, each plastic type can be selectively converted into an unsaturated polyolefin (UPO), which can be chemically split via metathesis. By rational design of reaction conditions, CPE (25 or 35 m% Cl) as a model substrate, a PVDC–PVC copolymer (66 m% Cl) and PVC (57 m% Cl) were consecutively converted into partially and fully dechlorinated UPOs. Both of these UPO products contained −CH₂–CH₂–sequences and up to 11 double bonds per 100 carbons. They were chemically split into α,ω-dienes using a second-generation Grubbs catalyst. Via this procedure, chlorinated plastics can be converted into valuable chemical building blocks, while the released HCl is sequestered.

氯化塑料的化学回收是工业上具有挑战性的，因为释放腐蚀性的HCl和炭的形成。在这项工作中，开发了一种新的氯化塑料升级回收途径，包括聚氯乙烯（PVC），聚偏氯乙烯（PVDC）和氯化聚乙烯（CPE）。当zncl2催化脱氢氯化（DHC）与DHC-串列加氢相结合，使用均相Ru加氢催化剂和金属氧化物作为HCl陷阱时，每种塑料类型都可以选择性地转化为不饱和聚烯烃（UPO）， UPO可以通过化学分解进行化学分裂。通过合理设计反应条件，以CPE（25或35 m% Cl）为模型底物，分别将PVC - PVC共聚物（66 m% Cl）和PVC （57 m% Cl）分别转化为部分脱氯和完全脱氯的upo。这两种UPO产物都含有−ch2 - ch2序列，每100个碳上含有多达11个双键。利用第二代格拉布催化剂，它们被化学分解成α，ω-二烯。通过这一过程，氯化塑料可以转化为有价值的化学构件，而释放的HCl被隔离。

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引用次数: 0

Microwave Electrification as a Process-Intensification Strategy for Calcination-Free, Scalable, and Sustainable Synthesis of Anatase-TiO2/α-Fe2O3 Photocatalysts 微波电气化作为无煅烧、可扩展和可持续合成锐钛矿- tio2 /α-Fe2O3光催化剂的工艺强化策略

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-26 DOI: 10.1021/acssuschemeng.5c12003

Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu

While anatase-TiO2/α-Fe2O3 (ATAF) composites are promising visible-light photocatalysts, their conventional synthesis is hindered by prolonged processing and high-temperature calcination, which limits scalability and increases energy consumption. This work demonstrates a rapid, single-step microwave-hydrothermal strategy to fabricate phase-pure ATAF composites within 10 min, entirely without calcination. This method facilitates the heterogeneous nucleation of anatase-TiO2 onto α-Fe2O3 particles, creating an intimate interface. By optimizing the α-Fe2O3 content with uniform TiO2 decoration on it, an ATAF composite exhibiting superior charge separation, as evidenced by significant photoluminescence quenching, is prepared. This optimal interface engineering results in a remarkable 99.9% photocatalytic degradation of methylene blue under visible light, significantly outperforming the individual constituents. This energy-efficient approach potentially reduces synthesis energy consumption by one to 2 orders of magnitude compared to conventional calcination routes, while the use of aqueous solvents and a closed system aligns with the principles of clean production. The combined advantages of rapid processing, energy efficiency, and scalability position this method as a viable pathway for the industrial-scale production of high-performance photocatalytic composites. The microwave-assisted hydrothermal synthesis demonstrates process electrification by transitioning from conventional furnace-based thermal treatment to direct microwave heating, resulting in reduced energy consumption and associated CO2 emissions.

虽然锐钛矿- tio2 /α-Fe2O3 （ATAF）复合材料是很有前途的可见光催化剂，但其传统合成受到长时间加工和高温煅烧的阻碍，这限制了可扩展性并增加了能耗。这项工作展示了一种快速的单步微波热液策略，可以在10分钟内制造相纯ATAF复合材料，完全不需要煅烧。这种方法有利于锐钛矿- tio2在α-Fe2O3颗粒上的非均相成核，形成一个紧密的界面。通过对α-Fe2O3含量进行优化，并在α-Fe2O3表面均匀修饰，制备出具有良好电荷分离性能的ATAF复合材料，并具有明显的光致猝灭现象。这种优化的界面工程使得亚甲基蓝在可见光下的光催化降解率达到99.9%，显著优于单个组分。与传统的煅烧路线相比，这种节能方法有可能将合成能耗降低一到两个数量级，同时使用水性溶剂和封闭系统符合清洁生产的原则。快速处理、能源效率和可扩展性的综合优势使该方法成为工业规模生产高性能光催化复合材料的可行途径。微波辅助水热合成证明了工艺电气化，从传统的基于炉的热处理过渡到直接微波加热，从而降低了能耗和相关的二氧化碳排放。

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引用次数: 0

Chemical Upcycling of Waste Chlorinated Plastics into α,ω-Dienes via Consecutive Dehydrochlorination-Hydrogenation with HCl Trapping and Metathesis 氯化废塑料连续脱氢-加氢- HCl捕集-复分解化学回收制备α，ω-二烯

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-26 DOI: 10.1021/acssuschemeng.5c11948

Christophe Vos,Galahad O’Rourke,Dirk De Vos

The chemical recycling of chlorinated plastics is industrially challenging due to the release of corrosive HCl and char formation. In this work, a novel upcycling route for chlorinated plastics, including polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and chlorinated polyethylene (CPE), is developed. When ZnCl2-catalyzed dehydrochlorination (DHC) is combined with tandem DHC-hydrogenation, using a homogeneous Ru hydrogenation catalyst and metal oxides as a HCl trap, each plastic type can be selectively converted into an unsaturated polyolefin (UPO), which can be chemically split via metathesis. By rational design of reaction conditions, CPE (25 or 35 m% Cl) as a model substrate, a PVDC–PVC copolymer (66 m% Cl) and PVC (57 m% Cl) were consecutively converted into partially and fully dechlorinated UPOs. Both of these UPO products contained −CH2–CH2–sequences and up to 11 double bonds per 100 carbons. They were chemically split into α,ω-dienes using a second-generation Grubbs catalyst. Via this procedure, chlorinated plastics can be converted into valuable chemical building blocks, while the released HCl is sequestered.

氯化塑料的化学回收是工业上具有挑战性的，因为释放腐蚀性的HCl和炭的形成。在这项工作中，开发了一种新的氯化塑料升级回收途径，包括聚氯乙烯（PVC），聚偏氯乙烯（PVDC）和氯化聚乙烯（CPE）。当zncl2催化脱氢氯化（DHC）与DHC-串列加氢相结合，使用均相Ru加氢催化剂和金属氧化物作为HCl陷阱时，每种塑料类型都可以选择性地转化为不饱和聚烯烃（UPO）， UPO可以通过化学分解进行化学分裂。通过合理设计反应条件，以CPE（25或35 m% Cl）为模型底物，分别将PVC - PVC共聚物（66 m% Cl）和PVC （57 m% Cl）分别转化为部分脱氯和完全脱氯的upo。这两种UPO产物都含有−ch2 - ch2序列，每100个碳上含有多达11个双键。利用第二代格拉布催化剂，它们被化学分解成α，ω-二烯。通过这一过程，氯化塑料可以转化为有价值的化学构件，而释放的HCl被隔离。

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引用次数: 0

Increased Giga-Cubic Meters of the Water Footprint of China’s Coal Caused by Washing 洗涤导致中国煤炭水足迹增加千兆立方米

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-26 DOI: 10.1021/acssuschemeng.5c09674

Jie Zhang, Xiaofan Wang, Yirong Wang, Yulong Yan, Sheng Zhang, Lin Peng, Menggang Li, Kechang Xie, Junjie Li

Coal washing plays a vital role in improving coal quality and reducing atmospheric pollutant emissions from coal combustion. However, the water footprint burdens caused by substantial freshwater consumption and wastewater discharge remain poorly understood. In this study, a comprehensive water footprint framework for coal washing was developed and used for a bottom-up analysis based on firsthand data from 2,367 coal washing plants across China in 2022. Compared with the scenario where coal was not washed, the national coal washing industry increases the water footprint by 7.38 Gm³, bringing the total water footprint of China’s coal supply chain to 27.68 Gm³, with gray water accounting for 90.9%. The water footprint intensities of commercial coal varied between 6.93 and 27.33 m³/t depending on the washing technologies, with a national average of 8.73 m³/t. Among the various technologies, jigging and jigging-based combined processes demonstrated relatively low water footprint intensities. From a production perspective, the spatial distribution of water footprint intensities in China exhibits a “high in the south and low in the north” pattern. However, an interprovincial transfer of 12.72 Gm³ of water footprint exacerbated the spatial mismatch between coal resources and water availability, owing to mismatches between production and consumption centers and prevailing trade flows. This study highlights the significant contribution of coal washing to the total water footprint of the coal life cycle and underscores the urgent need to incorporate water footprint balance into policies and decision-making regarding coal washing practices.

洗煤对提高煤质、减少燃煤排放大气污染物具有重要作用。然而，大量淡水消耗和废水排放造成的水足迹负担仍然知之甚少。在这项研究中，基于2022年中国2367家洗煤厂的第一手数据，开发了一个全面的洗煤水足迹框架，并将其用于自下而上的分析。与不洗煤情景相比，全国洗煤行业增加了7.38 Gm3的水足迹，使中国煤炭供应链的总水足迹达到27.68 Gm3，其中灰水占90.9%。商品煤的水足迹强度根据洗选技术的不同在6.93 ~ 27.33 m3/t之间，全国平均为8.73 m3/t。在各种工艺中，跳汰和基于跳汰的组合工艺表现出相对较低的水足迹强度。从生产角度看，中国水足迹强度的空间分布呈现“南高北低”的格局。然而，12.72 Gm3的水足迹跨省转移加剧了煤炭资源与水资源可得性的空间失配，这主要是由于生产和消费中心与主流贸易流之间的失配。这项研究强调了洗煤对煤炭生命周期总水足迹的重大贡献，并强调了将水足迹平衡纳入有关洗煤实践的政策和决策的迫切需要。

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引用次数: 0

Microwave Electrification as a Process-Intensification Strategy for Calcination-Free, Scalable, and Sustainable Synthesis of Anatase-TiO2/α-Fe2O3 Photocatalysts 微波电气化作为无煅烧、可扩展和可持续合成锐钛矿- tio2 /α-Fe2O3光催化剂的工艺强化策略

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-26 DOI: 10.1021/acssuschemeng.5c12003

Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu

While anatase-TiO2/α-Fe2O3 (ATAF) composites are promising visible-light photocatalysts, their conventional synthesis is hindered by prolonged processing and high-temperature calcination, which limits scalability and increases energy consumption. This work demonstrates a rapid, single-step microwave-hydrothermal strategy to fabricate phase-pure ATAF composites within 10 min, entirely without calcination. This method facilitates the heterogeneous nucleation of anatase-TiO2 onto α-Fe2O3 particles, creating an intimate interface. By optimizing the α-Fe2O3 content with uniform TiO2 decoration on it, an ATAF composite exhibiting superior charge separation, as evidenced by significant photoluminescence quenching, is prepared. This optimal interface engineering results in a remarkable 99.9% photocatalytic degradation of methylene blue under visible light, significantly outperforming the individual constituents. This energy-efficient approach potentially reduces synthesis energy consumption by one to 2 orders of magnitude compared to conventional calcination routes, while the use of aqueous solvents and a closed system aligns with the principles of clean production. The combined advantages of rapid processing, energy efficiency, and scalability position this method as a viable pathway for the industrial-scale production of high-performance photocatalytic composites. The microwave-assisted hydrothermal synthesis demonstrates process electrification by transitioning from conventional furnace-based thermal treatment to direct microwave heating, resulting in reduced energy consumption and associated CO2 emissions.

虽然锐钛矿- tio2 /α-Fe2O3 （ATAF）复合材料是很有前途的可见光催化剂，但其传统合成受到长时间加工和高温煅烧的阻碍，这限制了可扩展性并增加了能耗。这项工作展示了一种快速的单步微波热液策略，可以在10分钟内制造相纯ATAF复合材料，完全不需要煅烧。这种方法有利于锐钛矿- tio2在α-Fe2O3颗粒上的非均相成核，形成一个紧密的界面。通过对α-Fe2O3含量进行优化，并在α-Fe2O3表面均匀修饰，制备出具有良好电荷分离性能的ATAF复合材料，并具有明显的光致猝灭现象。这种优化的界面工程使得亚甲基蓝在可见光下的光催化降解率达到99.9%，显著优于单个组分。与传统的煅烧路线相比，这种节能方法有可能将合成能耗降低一到两个数量级，同时使用水性溶剂和封闭系统符合清洁生产的原则。快速处理、能源效率和可扩展性的综合优势使该方法成为工业规模生产高性能光催化复合材料的可行途径。微波辅助水热合成证明了工艺电气化，从传统的基于炉的热处理过渡到直接微波加热，从而降低了能耗和相关的二氧化碳排放。

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引用次数: 0

Microwave Electrification as a Process-Intensification Strategy for Calcination-Free, Scalable, and Sustainable Synthesis of Anatase-TiO2/α-Fe2O3 Photocatalysts 微波电气化作为无煅烧、可扩展和可持续合成锐钛矿- tio2 /α-Fe2O3光催化剂的工艺强化策略

IF 8.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering

Pub Date : 2026-01-26 DOI: 10.1021/acssuschemeng.5c12003

Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu,Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu,Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu

While anatase-TiO2/α-Fe2O3 (ATAF) composites are promising visible-light photocatalysts, their conventional synthesis is hindered by prolonged processing and high-temperature calcination, which limits scalability and increases energy consumption. This work demonstrates a rapid, single-step microwave-hydrothermal strategy to fabricate phase-pure ATAF composites within 10 min, entirely without calcination. This method facilitates the heterogeneous nucleation of anatase-TiO2 onto α-Fe2O3 particles, creating an intimate interface. By optimizing the α-Fe2O3 content with uniform TiO2 decoration on it, an ATAF composite exhibiting superior charge separation, as evidenced by significant photoluminescence quenching, is prepared. This optimal interface engineering results in a remarkable 99.9% photocatalytic degradation of methylene blue under visible light, significantly outperforming the individual constituents. This energy-efficient approach potentially reduces synthesis energy consumption by one to 2 orders of magnitude compared to conventional calcination routes, while the use of aqueous solvents and a closed system aligns with the principles of clean production. The combined advantages of rapid processing, energy efficiency, and scalability position this method as a viable pathway for the industrial-scale production of high-performance photocatalytic composites. The microwave-assisted hydrothermal synthesis demonstrates process electrification by transitioning from conventional furnace-based thermal treatment to direct microwave heating, resulting in reduced energy consumption and associated CO2 emissions.

虽然锐钛矿- tio2 /α-Fe2O3 （ATAF）复合材料是很有前途的可见光催化剂，但其传统合成受到长时间加工和高温煅烧的阻碍，这限制了可扩展性并增加了能耗。这项工作展示了一种快速的单步微波热液策略，可以在10分钟内制造相纯ATAF复合材料，完全不需要煅烧。这种方法有利于锐钛矿- tio2在α-Fe2O3颗粒上的非均相成核，形成一个紧密的界面。通过对α-Fe2O3含量进行优化，并在α-Fe2O3表面均匀修饰，制备出具有良好电荷分离性能的ATAF复合材料，并具有明显的光致猝灭现象。这种优化的界面工程使得亚甲基蓝在可见光下的光催化降解率达到99.9%，显著优于单个组分。与传统的煅烧路线相比，这种节能方法有可能将合成能耗降低一到两个数量级，同时使用水性溶剂和封闭系统符合清洁生产的原则。快速处理、能源效率和可扩展性的综合优势使该方法成为工业规模生产高性能光催化复合材料的可行途径。微波辅助水热合成证明了工艺电气化，从传统的基于炉的热处理过渡到直接微波加热，从而降低了能耗和相关的二氧化碳排放。

{"title":"Microwave Electrification as a Process-Intensification Strategy for Calcination-Free, Scalable, and Sustainable Synthesis of Anatase-TiO2/α-Fe2O3 Photocatalysts","authors":"Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu,Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu,Praveen Kumar Lavudya,Sesha SuryaBindu Devarakonda,Dharani Kumar Chennamsetty,Nowduru Ravikiran,Venkata Satya Siva Srikanth Vadali,Rajanikanth Ammanabrolu","doi":"10.1021/acssuschemeng.5c12003","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c12003","url":null,"abstract":"While anatase-TiO2/α-Fe2O3 (ATAF) composites are promising visible-light photocatalysts, their conventional synthesis is hindered by prolonged processing and high-temperature calcination, which limits scalability and increases energy consumption. This work demonstrates a rapid, single-step microwave-hydrothermal strategy to fabricate phase-pure ATAF composites within 10 min, entirely without calcination. This method facilitates the heterogeneous nucleation of anatase-TiO2 onto α-Fe2O3 particles, creating an intimate interface. By optimizing the α-Fe2O3 content with uniform TiO2 decoration on it, an ATAF composite exhibiting superior charge separation, as evidenced by significant photoluminescence quenching, is prepared. This optimal interface engineering results in a remarkable 99.9% photocatalytic degradation of methylene blue under visible light, significantly outperforming the individual constituents. This energy-efficient approach potentially reduces synthesis energy consumption by one to 2 orders of magnitude compared to conventional calcination routes, while the use of aqueous solvents and a closed system aligns with the principles of clean production. The combined advantages of rapid processing, energy efficiency, and scalability position this method as a viable pathway for the industrial-scale production of high-performance photocatalytic composites. The microwave-assisted hydrothermal synthesis demonstrates process electrification by transitioning from conventional furnace-based thermal treatment to direct microwave heating, resulting in reduced energy consumption and associated CO2 emissions.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"1 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146044926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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