Separation and Purification Technology最新文献

{"title":"Tailoring amine activators in MDEA/NHD/H2O biphasic absorbents for energy-efficient CO2 capture: Mechanistic insights into polarity-driven phase separation and multi-component synergy","authors":"Dingkai Hu, Bohak Yoon, Yanlong Hu, Dezhi Cao, Qiang Wang, Bin Wang, Shijian Lu","doi":"10.1016/j.seppur.2025.133908","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133908","url":null,"abstract":"Amine-based CO₂ capture faces significant challenges due to high regeneration energy requirements (3.50–4.50 GJ/tCO₂) and the trade-off between viscosity and liquid–liquid phase separation. In this work, we designed a biphasic absorbent by optimizing a ternary methyldiethanolamine (MDEA)/polyethylene glycol dimethyl ether (NHD)/water system, synergized with activators including monoethanolamine (MEA), diethanolamine (DEA), 2-amino-2-methyl-1-propanol (AMP), and piperazine (PZ) to address these limitations. Our results reveal that incorporating 15 wt% MEA yielded the best performance, enhancing absorption capacity to 2.04 mol/L–90 % higher than the MDEA/NHD/H₂O baseline–while achieving a sevenfold increase in the initial absorption rate and a 34 % reduction in regeneration energy (2.50 GJ/tCO₂) compared to 30 wt% MEA solutions. DEA and PZ showed lower capacity enhancements (24 % and 90 %, respectively), while PZ led to viscosity spikes, and AMP caused impractical solid–liquid separation. The optimized 15 wt% MEA + 15 wt% MDEA + 50 wt% NHD + 20 wt% H2O (3M3M10N4H) system exhibited polarity-driven liquid–liquid phase separation, where high-dipole absorption products (e.g., MEACOO⁻ with a dipole moment of 21.99 D) concentrated in the aqueous phase, while low-polarity NHD formed a distinct phase. Density functional theory (DFT) calculations revealed ion–dipole interactions as the thermodynamic driver of liquid–liquid phase separation. Mechanistic studies further demonstrated that MDEA reduced the energy barrier for zwitterionic intermediate conversion to carbamate via proton transfer (12 kcal/mol), enhancing both absorption kinetics and capacity through synergistic interactions with MEA. Desorption at 120 °C achieved 93 % CO₂ release efficiency with 92 % capacity retention over five cycles, maintaining stable lean/rich phase ratios. Based on these insights, we propose a functional division strategy integrating an “activator-main amine-phase separation agent” framework, elucidating the multi-component synergy mechanisms governing absorption, phase separation, and regeneration. This study highlights a rational design framework for energy-efficient and stable liquid–liquid phase change absorbents for CO₂ capture.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"9 1","pages":"133908"},"PeriodicalIF":8.6,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Azobenzene-based metal-organic framework incorporating persistent luminescent material LiYGeO4:Bi3+ as the adsorbent for photo-responsive adsorption of CO2","authors":"Qi-Qi Huang,&nbsp;Xi-Peng Zhang,&nbsp;Shi-Chao Qi,&nbsp;Wen-Juan Zhang,&nbsp;Lin-Bing Sun","doi":"10.1016/j.seppur.2025.133921","DOIUrl":"10.1016/j.seppur.2025.133921","url":null,"abstract":"<div><div>Photo-responsive adsorbents offer promising application potential because of their adaptable adsorption ability in different light situations. However, these adsorbents usually rely on continuous radiation of a light source for an extended time, which inevitably generates additional thermal effects that affect the adsorption performance. Inorganic persistent luminescent material (PLM) can exhibit excellent photo-stimulated capability and last for a long period after being irradiated with specific wavelengths of light in a short time. Herein, we fabricated a series of new composite adsorbents, JUC-PLM-n, comprising the inorganic PLM LiYGeO₄:Bi³⁺ and the azobenzene-based MOF JUC-62. The radiation at 254 nm for 10 min given to the JUC-PLM-n adsorbents with LiYGeO₄:Bi³⁺ is sufficient to produce bending inhibition of the photo-responsive ligand azobenzene group of JUC-62 for up to 6 h. The CO₂ adsorption capacity at 0 ℃ of JUC-PLM-2 decreased from 66.6 before radiation to 56.0 cm³ g⁻¹ after the 10 min radiation at 254 nm. In contrast, the CO₂ adsorption capacity of the pristine JUC-62 was almost unchanged at 254 nm.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133921"},"PeriodicalIF":8.1,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144237451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Covalent binding of amines to hierarchically porous MOFs for enhanced arsenic removal","authors":"Fei Ni ,&nbsp;Shuxin Shen ,&nbsp;Tianle Cao,&nbsp;Guangli Yu,&nbsp;Zhiqi Zhu,&nbsp;Kangjun Wang","doi":"10.1016/j.seppur.2025.133913","DOIUrl":"10.1016/j.seppur.2025.133913","url":null,"abstract":"<div><div>Arsenite (As(III)) threatens to environmental sustainability and human health due to its high mobility and toxic nature. Metal-organic frameworks (MOFs) have gained attention as effective adsorbents for removing As from wastewater systems. Nevertheless, their practical implementation is frequently hindered by several challenges, including inadequate functional stability and insufficient availability of binding sites. In this study, four innovative functionalized adsorbents were developed by covalently grafting ethylenediamine (ED), diethylenetriamine (DETA), tris(2-aminoethyl)amine (TAEA), and polyethyleneimine (PEI) onto the hierarchically structured UiO-66-NH₂ (referred to as HP-UiO-66-NH₂) through a bromoacetyl bromide-assisted reaction. The creation of hierarchical pores in the MOFs not only enabled the accommodation of amine groups but also enhanced the mass transfer of As(III). Notably, the DETA/HP-UiO-66-NH₂ material exhibited an exceptional adsorption capacity for As(III), reaching up to 406.5 mg g⁻¹, which exceeds the performance of the majority of adsorbents reported thus far. In practical applications, a mere 1 mg of DETA/HP-UiO-66-NH₂ is sufficient to effectively remove trace amounts of As(III), meeting the World Health Organization’s recommended limit for drinking water (&lt; 10 µg L⁻¹). Fixed-bed column experiments revealed that this adsorbent could treat approximately 1530 bed volumes of arsenic-laden groundwater, achieving a five-fold improvement over commercially available activated carbon. Additionally, the material possessed considerable anti-interference capacity (85 %-96 % effectiveness relative to the blank control) and high regenerability, retaining 91 % of its adsorption capacity after five cycles. Investigations utilizing SEM, N₂ adsorption, XPS, FT-IR, and DFT calculations substantiated that both physical and chemical adsorption were the principal mechanisms driving the adsorption of As(III). This research provides a versatile methodology for the development of ultrahigh-performance MOF adsorbents aimed at addressing arsenic contamination.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133913"},"PeriodicalIF":8.1,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strategies for enhancing performance sustainability of air filters: challenges and future directions","authors":"Chunhui Li, Han Wang, Xinran Zeng, Xiaoying Li, Ruiying Jin, Youyan Chi, Qi Liu, Li Bai, Zhenhai Li, Kwok Wai Tham","doi":"10.1016/j.seppur.2025.133912","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133912","url":null,"abstract":"The escalating challenges of air pollution and health issues in indoor environments have underscored the critical role of air filters in improving indoor air quality. However, traditional air filters face an inherent trade-off among filtration efficiency, airflow resistance, and service life. Specifically, highly efficient filters tend to exhibit a high pressure drop and shorter service life, resulting in increased energy consumption and more frequent maintenance. These limitations pose significant barriers to the development of high-performance and long-life air purification systems. This review aims to explore multidimensional solutions for enhancing the performance sustainability of air filters. Through a systematic review of recent advancements, this study focuses on four key areas: structural optimisation, material innovation, electrostatic enhancement, and cleaning and regeneration technologies. A comprehensive analysis is provided on the contributions of these technologies to improving filtration efficiency, reducing energy consumption, and extending filter longevity. Finally, this review integrates insights across these domains to propose a multidimensional strategy for the advancement of air filtration technologies. It establishes a clear foundation for the development of sustainable, high-performance filtration systems, thereby contributing significantly to the green transformation of the built environment and the protection of public health.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"43 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144237414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chiral electrokinetic chromatography using dual pseudo-stationary phases: SBE-β-CD with hydrophobic (deep) eutectic solvents versus micelles and ionic liquids","authors":"Song Xue ,&nbsp;Yu Xu ,&nbsp;Sihui Ding ,&nbsp;Haoxiang Meng ,&nbsp;Xiaodong Sun ,&nbsp;Qi Zhang","doi":"10.1016/j.seppur.2025.133915","DOIUrl":"10.1016/j.seppur.2025.133915","url":null,"abstract":"<div><div>Two hydrophobic (deep) eutectic solvents (H(D)ESs), menthol:octanoic acid (Men:OctA) and menthol:trioctylphosphine oxide (Men:TOPO), were prepared, characterized, and then employed for the first time in combination with sulfobutylether-β-cyclodextrin (SBE-β-CD) for chiral separations in capillary electrokinetic chromatography (EKC). The “H(D)ES + SBE-β-CD” dual pseudo-stationary phase (PSP) systems yielded not only enhanced enantioselectivities, but also accelerated migrations of primaquine and chlorpheniramine, two drugs that cannot be resolved using the single SBE-β-CD system. The enhancement originated from the combined effects of stereoselective complexation and hydrophobic partitioning involving the H(D)ES phase, which moved faster than the anionic CD phase under the separation conditions. The best results in terms of enantioresolution and migration time were obtained using a 20 mM phosphate buffer (pH 7.0) containing 2.0 % SBE-β-CD and 0.2 % Men:OctA at an applied voltage of 15 kV. We further compared the chiral EKC performance of the H(D)ESs with a series of conventional PSPs, including three micelles (Tween-20, Brij-35, SDS) and three ionic liquids (ILs). The results showed that none of these modifiers could achieve comparable EKC performance, suggesting that in certain cases, H(D)ESs could be a superior alternative to traditional modifiers for chiral EKC separations.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133915"},"PeriodicalIF":8.1,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144237413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing one-photon-based heterojunction for superior CO2 photoreduction under visible light","authors":"Rizwan Ullah ,&nbsp;Iftiab Ahammed Sarker ,&nbsp;Mohd Shahbudin Masdar ,&nbsp;Rozan Mohamad Yunus ,&nbsp;Nurul Akidah Baharuddin ,&nbsp;Jawad Ali ,&nbsp;Munir Ahmad ,&nbsp;Muhammad Zahid ,&nbsp;Anadil Gul","doi":"10.1016/j.seppur.2025.133914","DOIUrl":"10.1016/j.seppur.2025.133914","url":null,"abstract":"<div><div>An innovative one-photon-based heterojunctions, designed by integrating doping and heterostructure strategies to enhance photocatalytic efficiency, is reviewed. Fe (iron) incorporation into Bi₂WO₆ (BWO) reduces the energy bandgap, thereby extending light absorption to longer wavelengths and suppressing charge recombination. Additionally, defect-rich MoS₂ with an aligned bandgap was synthesized and loaded to construct an effective reduction heterojunction, triggered by one photon. The synthesized heterojunction exhibits direct interfacial chemical interactions between Fe and MoS₂ atoms, significantly enhancing charge carrier dynamics. The surface defects on MoS₂ act as active centers for CO₂ molecule activation, demonstrating highly efficient CO₂ photoreduction activity. Notably, the heterojunction achieves CH₄ (CO) yields that are 3.2 (3.7) and 2.1 (2.9) times greater than MoS₂ and Fe@BWO, respectively, demonstrating its synergistic efficiency. In-situ XPS and in-situ EPR analyses reveal intriguing insights into the charge transfer pathway, suggesting a heterojunction mechanism with distinct interfacial interactions that align with advanced photocatalytic charge dynamics. This study establishes a promising platform for advancing redox heterojunction materials and provides valuable insights into optimizing redox properties and charge dynamics for the design of next-generation semiconductor photocatalysts with enhanced efficiency and sustainability. Hence, offering strong potential for integration into photocatalytic fuel cells application and other solar-driven energy conversion technologies.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133914"},"PeriodicalIF":8.1,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring electrodialysis membrane technology for the purification of biosurfactant extracts and recovery of lactic acid from corn steep water","authors":"X. Vecino ,&nbsp;A. Martínez-Arcos ,&nbsp;J.M. Cruz ,&nbsp;A.B. Moldes ,&nbsp;J.L. Cortina ,&nbsp;M. Reig","doi":"10.1016/j.seppur.2025.133889","DOIUrl":"10.1016/j.seppur.2025.133889","url":null,"abstract":"<div><div>Corn steep water (CSW) is an agri-food byproduct from the corn industry that contains valuable biocompounds, such as biosurfactants (BS) and lactic acid (LA), which are of industrial interest to be recovered. In this work, electrodialysis (ED) is presented as a promising technique for simultaneously purifying BS and recovering LA. Indeed, ED has already been used for LA recovery, but there is a lack of research regarding its application for BS purification. More precisely, this work investigates the purification of BS from CSW using electrodialysis systems, obtaining a LA-rich stream as a byproduct. For that, different ED operational parameters were studied: pH, cell pairs, and membrane type. Finally, ED with bipolar membranes (EDBM) was tested for further purification of biosurfactant extract. Results showed that the optimal conditions were achieved with CSW unmodified pH (4.5), 6 cell pairs and standard membranes. Under the ED optimum conditions, biosurfactants in CSW were concentrated 2 times based on their relative abundance, whereas EDBM tests showed production of LA in the acid stream and KOH in the basic stream, with concentration factors around 2 and 4, respectively. Overall, this study showcased that ED is efficient for the purification of biosurfactants, yielding an extract able to reduce the surface tension of water up to 54.9 ± 0.7 mN/m with a critical micelle concentration (CMC) of 0.18 ± 0.01 g/L, improving by 3.5-folds. Furthermore, the simultaneous recovery of organic acids from CSW, such as LA, paves the way for more sustainable and environmentally friendly processing methods.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133889"},"PeriodicalIF":8.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D nested solar evaporator based on CuO MF/OH-MWCNT for high-efficient desalination of seawater","authors":"Yue Hou ,&nbsp;Zhiping Zhang ,&nbsp;Jinlei Cha ,&nbsp;Shunyu Han ,&nbsp;Zhenxing Yin","doi":"10.1016/j.seppur.2025.133905","DOIUrl":"10.1016/j.seppur.2025.133905","url":null,"abstract":"<div><div>Continuing climate deterioration and accelerated population growth are creating unprecedented pressure on limited freshwater supplies. The development of efficient and stable solar desalination devices is emerging as an effective way to alleviate this crisis and ensure a sustainable water supply. In this study, a 3D nested evaporator composed of CuO microflowers (CuO MFs) and hydroxylated multi-walled carbon nanotubes (OH-MWCNTs) integrated into air-calcined melamine sponge (AMS) was designed for solar desalination. The innovative structure of the evaporator not only enhances water transfer capacity but also minimizes heat loss. Among them, AMS acts as the matrix skeleton that provides structural support and possesses great photothermal conversion performance. Because of the unique micro-nano hierarchical structure and the synergistic photothermal effect of CuO MF/OH-MWCNT, the evaporator demonstrates remarkable evaporation performance and salt resistance, achieving an evaporation rate of 4.25 kg∙m⁻²∙h⁻¹ and an efficiency of 180.76 % under standard solar illumination (1 kW∙m⁻²). Additionally, the evaporator exhibits excellent self-cleaning capabilities and long-term stability, maintaining consistent performance across various complex environments. This study contributes to the development of sustainable water treatment technologies and provides a feasible approach to constructing high-performance solar vapor generation devices.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133905"},"PeriodicalIF":8.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of perfluorooctanoic acid and perfluorooctane sulfonate adsorption by Ca- and Fe-modified biochars: Potential of Ca-modified biochar in real water matrices","authors":"Kyeong Hwan Kang ,&nbsp;Changgil Son ,&nbsp;Sungjun Bae ,&nbsp;Kangmin Chon ,&nbsp;Young Mo Kim","doi":"10.1016/j.seppur.2025.133906","DOIUrl":"10.1016/j.seppur.2025.133906","url":null,"abstract":"<div><div>Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) are persistent organic pollutants widely found in water matrices and pose significant ecological and health risks. This study investigated the adsorption behaviors and mechanisms of calcium- and iron-modified biochars (CMB and IMB) fabricated from mandarin peel and focused on their applicability in real water matrices. CMB and IMB exhibited markedly enhanced adsorption capacity compared to unmodified biochar (MB), contributed to improved electrostatic attraction and ion and ligand exchange across a broad pH range. In real water matrices, IMB demonstrated superior efficiency in simpler matrices like tap water, while CMB showed better performance in more complex environments such as river water and sewage treatment effluent. These results were attributed to the competitive adsorption of PFOA and PFOS onto IMB in the presence of coexisting ions and humic acids compared to CMB. A quadratic regression model successfully predicted adsorption capacities under various water conditions, supporting its effective use in real water matrices. This study highlighted the potential of modifying CMB and IMB for the removal of PFOA and PFOS by demonstrating their effectiveness in complex or simple water matrices and further emphasized that Ca-modified biochar is particularly promising under more complex water environmental conditions.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133906"},"PeriodicalIF":8.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced performance of hierarchical porous HKUST-1/g-C3N4 heterostructure in the degradation of antibiotics with and without light","authors":"Liqin Nie ,&nbsp;Kaige Wang ,&nbsp;Wei Zhao ,&nbsp;Chen Zhang ,&nbsp;Tiehan Shen","doi":"10.1016/j.seppur.2025.133894","DOIUrl":"10.1016/j.seppur.2025.133894","url":null,"abstract":"<div><div>Currently, the advanced oxidation processes (AOPs) for water treatment are limited by the demand on externally supplied oxidants or illumination. To overcome these constraints, a series of micro-nano-composites composed of a copper-based metal–organic framework 'HKUST-1' and graphitic carbon nitride (g-C₃N₄) nanosheets, were designed and synthesized via electrostatic self-assembly, hydrothermal treatment and decarboxylation. These hierarchical porous catalysts (HP-HKUST-1/g-C₃N₄) exhibit outstanding characteristics, particularly, in the degradation of Tetracycline Hydrochloride (TCH) under either total darkness or visible illumination. Experimental results demonstrate that TCH can be effectively degraded without externally supplied oxidant. Under dark conditions, 30 mg of the catalyst removed 99.92% of 50 mL 50 mg·L⁻¹ TCH in 30 min; under visible light, 99.95% degradation was achieved in just 20 min. The exceptional performance is attributed to high Cu(I) content which offer strong reducing power to activate O₂ to generate H₂O₂. Additionally, photoexcited electrons in g-C₃N₄ transfer to HKUST-1 via heterojunctions, which suppresses the recombination of electron-hole pairs in g-C₃N₄ and supplies extra electrons for the O₂ reduction in HKUST-1. This study not only presents ideas for designing highly efficient catalysts with self-produced H₂O₂ by activating O₂, but also proposes a practical pathway towards the development of AOPs for wastewater treatment.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"376 ","pages":"Article 133894"},"PeriodicalIF":8.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}