Pub Date : 2025-04-06DOI: 10.1016/j.cej.2025.162356
Bin Yu, Leijin Wang, Zheng Li, Haixia Liang, Kaiyu Zhao, Yafei Guo, Tianlong Deng
Efficient and eco-friendly iodine recovery from underground brine with ultrahigh Cl/I ratios faces a great challenge for the traditional methods of iodine extraction from brine. In this work, we developed a novel electrooxidation-adsorption coupling technology for green and efficient iodine recovery from underground brine with an ultrahigh Cl/I ratio. Initially, the iodide ions (I-) were selectively oxidized to triiodide ions (I3-) with an excellent electrooxidation rate of 80.46 % using an electrochemical apparatus. Subsequently, a novel porous Co-Vlm6 adsorbent synthesized via the hydrothermal method achieved a remarkable adsorption capacity of 1466.01 mg·g−1, with the adsorption equilibrium reached in just 3 min. Applying this electrooxidation adsorption coupling process to underground brine resulted in 81.93 % iodine recovery within 125 min. The outstanding electrooxidation-adsorption/desorption performance, cyclic stability, and cost-effectiveness make it a competitive candidate for the efficient recovery of iodine from underground brine and other liquid iodine resources.
{"title":"Innovative electrooxidation-adsorption technology for efficient iodine recovery from ultrahigh Cl/I ratio underground brine","authors":"Bin Yu, Leijin Wang, Zheng Li, Haixia Liang, Kaiyu Zhao, Yafei Guo, Tianlong Deng","doi":"10.1016/j.cej.2025.162356","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162356","url":null,"abstract":"Efficient and eco-friendly iodine recovery from underground brine with ultrahigh Cl/I ratios faces a great challenge for the traditional methods of iodine extraction from brine. In this work, we developed a novel electrooxidation-adsorption coupling technology for green and efficient iodine recovery from underground brine with an ultrahigh Cl/I ratio. Initially, the iodide ions (I<sup>-</sup>) were selectively oxidized to triiodide ions (I<sub>3</sub><sup>-</sup>) with an excellent electrooxidation rate of 80.46 % using an electrochemical apparatus. Subsequently, a novel porous Co-Vlm<sub>6</sub> adsorbent synthesized via the hydrothermal method achieved a remarkable adsorption capacity of 1466.01 mg·g<sup>−1</sup>, with the adsorption equilibrium reached in just 3 min. Applying this electrooxidation adsorption coupling process to underground brine resulted in 81.93 % iodine recovery within 125 min. The outstanding electrooxidation-adsorption/desorption performance, cyclic stability, and cost-effectiveness make it a competitive candidate for the efficient recovery of iodine from underground brine and other liquid iodine resources.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"37 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784775","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}
Lithium-sulfur batteries have attracted much attention due to the high theoretical specific capacity and energy density; however, the shuttle effect of polysulfides hinders the commercialization of lithium-sulfur batteries. In this work, a kind of two-dimensional MXene-MOF (Ti3C2Tx-UIO-66-NH2) composite material was designed as the separator. The Ti3C2Tx provides excellent specific surface area and conductivity, while UIO-66-NH2 owns high porosity and microporous channels. Such synergistic effect endows Ti3C2Tx-UIO-66-NH2 to not only physically suppress the shuttle of polysulfides, but also to promote the catalytic conversion of polysulfides. The battery equipped with Ti3C2Tx-UIO-66-NH2 displays a high initial specific capacity of 1247 mAh g−1 at 0.1C with a decay rate of 0.04093 % per cycle even after 1500 cycles. Furthermore, the mechanism is rationalized from the perspective of theoretical calculations. This strategy paves an avenue to design separator with high performance and advance the practical application of lithium-sulfur batteries.
{"title":"Fabrication of MXene/MOF composite separators for high performance lithium-sulfur batteries","authors":"Yinchuan Wang, Rui Niu, Liyi Chen, Yu Yang, Haizhou Yu, Xiaoyan Qiu","doi":"10.1016/j.cej.2025.162305","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162305","url":null,"abstract":"Lithium-sulfur batteries have attracted much attention due to the high theoretical specific capacity and energy density; however, the shuttle effect of polysulfides hinders the commercialization of lithium-sulfur batteries. In this work, a kind of two-dimensional MXene-MOF (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-UIO-66-NH<sub>2</sub>) composite material was designed as the separator. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> provides excellent specific surface area and conductivity, while UIO-66-NH<sub>2</sub> owns high porosity and microporous channels. Such synergistic effect endows Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-UIO-66-NH<sub>2</sub> to not only physically suppress the shuttle of polysulfides, but also to promote the catalytic conversion of polysulfides. The battery equipped with Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-UIO-66-NH<sub>2</sub> displays a high initial specific capacity of 1247 mAh g<sup>−1</sup> at 0.1C with a decay rate of 0.04093 % per cycle even after 1500 cycles. Furthermore, the mechanism is rationalized from the perspective of theoretical calculations. This strategy paves an avenue to design separator with high performance and advance the practical application of lithium-sulfur batteries.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"46 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784843","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}
Pub Date : 2025-04-06DOI: 10.1016/j.cej.2025.162323
Xiaoting Sun, Wanting Rong, Lanfang Wang, Jiangnan Lv, Ruixia Yang, Tingting Liang, Qianwen Yang, Xiaohong Xu, Yang Liu
Electrochemical NO3– reduction reaction (NO3−RR) represents a promising avenue for efficient and sustainable synthesis of ammonia (NH3), with active hydrogen playing a pivotal role in multiple hydrogenation steps. Manganese (Mn)-based electrocatalysts have demonstrated potential in modulating active hydrogen, however, achieving atomically dispersed Mn active sites poses a fundamental challenge. To address the issue, we synthesize Mn-doped ceria with oxygen vacancies (Mn-CeO2−x) nanoparticles, where Mn2+ is stabilized within the CeO2−x host lattice, to facilitate efficient NO3− reduction to NH3. The highest NH3 FE of 91.8 % is observed over Mn-CeO2−x catalyst at −0.60 VRHE and the maximum NH3 yield rate reaches 1.01 mmol h−1 cm−2, outperforming other metal (M = Fe, Co, Ni, and Cu) doped and undoped CeO2−x nanoparticles. Experimental analysis and density functional theory (DFT) calculations cooperatively elucidate that the Mn doping optimizes the electronic structure of CeO2−x catalysts, leading to the generation of ample active hydrogen, improve the reaction kinetics and promote the *NH2O → *NH2OH step in NO3−RR. Our study introduces a rare-earth metal oxide platform for dispersing transition metal active sites, enabling the regulation of active hydrogen and the enhancement of electrocatalytic performance in NO3−RR.
{"title":"Enhanced nitrate-to-ammonia electroreduction on manganese-doped ceria with oxygen vacancies","authors":"Xiaoting Sun, Wanting Rong, Lanfang Wang, Jiangnan Lv, Ruixia Yang, Tingting Liang, Qianwen Yang, Xiaohong Xu, Yang Liu","doi":"10.1016/j.cej.2025.162323","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162323","url":null,"abstract":"Electrochemical NO<sub>3</sub><sup>–</sup> reduction reaction (NO<sub>3</sub><sup>−</sup>RR) represents a promising avenue for efficient and sustainable synthesis of ammonia (NH<sub>3</sub>), with active hydrogen playing a pivotal role in multiple hydrogenation steps. Manganese (Mn)-based electrocatalysts have demonstrated potential in modulating active hydrogen, however, achieving atomically dispersed Mn active sites poses a fundamental challenge. To address the issue, we synthesize Mn-doped ceria with oxygen vacancies (Mn-CeO<sub>2−</sub><em><sub>x</sub></em>) nanoparticles, where Mn<sup>2+</sup> is stabilized within the CeO<sub>2−</sub><em><sub>x</sub></em> host lattice, to facilitate efficient NO<sub>3</sub><sup>−</sup> reduction to NH<sub>3</sub>. The highest NH<sub>3</sub> FE of 91.8 % is observed over Mn-CeO<sub>2−</sub><em><sub>x</sub></em> catalyst at −0.60 V<sub>RHE</sub> and the maximum NH<sub>3</sub> yield rate reaches 1.01 mmol h<sup>−1</sup> cm<sup>−2</sup>, outperforming other metal (M = Fe, Co, Ni, and Cu) doped and undoped CeO<sub>2−</sub><em><sub>x</sub></em> nanoparticles. Experimental analysis and density functional theory (DFT) calculations cooperatively elucidate that the Mn doping optimizes the electronic structure of CeO<sub>2−</sub><em><sub>x</sub></em> catalysts, leading to the generation of ample active hydrogen, improve the reaction kinetics and promote the *NH<sub>2</sub>O → *NH<sub>2</sub>OH step in NO<sub>3</sub><sup>−</sup>RR. Our study introduces a rare-earth metal oxide platform for dispersing transition metal active sites, enabling the regulation of active hydrogen and the enhancement of electrocatalytic performance in NO<sub>3</sub><sup>−</sup>RR.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"59 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784776","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}
Pub Date : 2025-04-06DOI: 10.1016/j.cej.2025.161943
Yuhan Zhou, Min Zhao, Ke Bai, Xiaomin Xu, Haifeng Wang, Yong Chen, Jing Zeng, Hui Tong, Hanbing He
The O3-type Na[Ni1/3Fe1/3Mn1/3]O2 cathode material for sodium-ion batteries is restricted by problems such as poor performance and low capacity retention rate during high-rate charge and discharge, making it difficult to be applied on a large scale. In this study, a B-Co co-doping strategy based on solid solution was adopted to address the issues of low capacity retention rate and slow ion diffusion rate caused by the complex phase transition of the Na[Ni1/3Fe1/3Mn1/3]O2 cathode material. B-Co co-doped Na[Ni1/3Fe1/3Mn1/3]O2 samples were prepared by solid-phase sintering method and investigated. The B-Co co-doped sample exhibits an initial discharge specific capacity of 105.4 mAh·g−1 at a 1C rate, with a capacity retention rate as high as 92.79 % after 100 cycles. The experimental results demonstrate that the B-Co co-doping strategy based on solid solution can effectively mitigate phase transition, increase the interlayer spacing, and significantly enhance the structural stability, endowing the cathode material with high electrical conductivity, high structural stability, and high specific capacity retention rate. This research provides solid theoretical support and important references for the development of high-performance sodium-ion battery cathode materials.
{"title":"Research on the construction of high-stability O3-type sodium-ion battery cathode materials via B-Co doping based on solid solutions","authors":"Yuhan Zhou, Min Zhao, Ke Bai, Xiaomin Xu, Haifeng Wang, Yong Chen, Jing Zeng, Hui Tong, Hanbing He","doi":"10.1016/j.cej.2025.161943","DOIUrl":"https://doi.org/10.1016/j.cej.2025.161943","url":null,"abstract":"The O3-type Na[Ni<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> cathode material for sodium-ion batteries is restricted by problems such as poor performance and low capacity retention rate during high-rate charge and discharge, making it difficult to be applied on a large scale. In this study, a B-Co co-doping strategy based on solid solution was adopted to address the issues of low capacity retention rate and slow ion diffusion rate caused by the complex phase transition of the Na[Ni<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> cathode material. B-Co co-doped Na[Ni<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> samples were prepared by solid-phase sintering method and investigated. The B-Co co-doped sample exhibits an initial discharge specific capacity of 105.4 mAh·g<sup>−1</sup> at a 1C rate, with a capacity retention rate as high as 92.79 % after 100 cycles. The experimental results demonstrate that the B-Co co-doping strategy based on solid solution can effectively mitigate phase transition, increase the interlayer spacing, and significantly enhance the structural stability, endowing the cathode material with high electrical conductivity, high structural stability, and high specific capacity retention rate. This research provides solid theoretical support and important references for the development of high-performance sodium-ion battery cathode materials.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"56 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784841","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}
Pub Date : 2025-04-06DOI: 10.1016/j.cej.2025.162314
Ebubekir Camizci, Ibrahimhan Dilci, Zhengguo Xiao, Savas Sonmezoglu
Despite their outstanding thermal stability and optimal band gap for tandem devices, the development of high-performance CsPbI2Br-based inorganic perovskite solar cells is considerably hampered by defect-induced nonradiative recombination and halide ion migration. Herein, we have developed a series of CsPbI2Br inorganic perovskite materials modified by incorporation of thulium (Tm3+) ions as B-site heterovalent dopants and explored their favourable impacts on the photovoltaic and stability performance of fully inorganic perovskite solar cells (FTO/SnO2/CsPb1-xTmxI2Br/CuSCN/r-GO/Au) for the first time. The champion solar cells achieve an impressive efficiency of over 17 %, with less degradations (<5%) after 400 h of operational stability and ∼30 % after 320 h of shelf stability owing to suppression of nonradiative recombination of carriers and inhibition of halide ion migration by controlling crystallization and phase stabilization. Overall, it was revealed that the Tm3+ ions do not play a role only elimination of ion migration and defects in perovskite film but also protects perovskite layer from moisture and continuous light illumination in fully inorganic perovskite solar cells
{"title":"Defect passivation and crystallization management enabled by thulium dopant as B-site cation for highly stable and efficiency fully inorganic perovskite solar cells with over 17% efficiency","authors":"Ebubekir Camizci, Ibrahimhan Dilci, Zhengguo Xiao, Savas Sonmezoglu","doi":"10.1016/j.cej.2025.162314","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162314","url":null,"abstract":"Despite their outstanding thermal stability and optimal band gap for tandem devices, the development of high-performance CsPbI<sub>2</sub>Br-based inorganic perovskite solar cells is considerably hampered by defect-induced nonradiative recombination and halide ion migration. Herein, we have developed a series of CsPbI<sub>2</sub>Br inorganic perovskite materials modified by incorporation of thulium (Tm<sup>3+</sup>) ions as B-site heterovalent dopants and explored their favourable impacts on the photovoltaic and stability performance of fully inorganic perovskite solar cells (FTO/SnO<sub>2</sub>/CsPb<sub>1-x</sub>Tm<sub>x</sub>I<sub>2</sub>Br/CuSCN/r-GO/Au) for the first time. The champion solar cells achieve an impressive efficiency of over 17 %, with less degradations (<5%) after 400 h of operational stability and ∼30 % after 320 h of shelf stability owing to suppression of nonradiative recombination of carriers and inhibition of halide ion migration by controlling crystallization and phase stabilization. Overall, it was revealed that the Tm<sup>3+</sup> ions do not play a role only elimination of ion migration and defects in perovskite film but also protects perovskite layer from moisture and continuous light illumination in fully inorganic perovskite solar cells","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"35 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784777","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}
Toluene, n-propanol, and water are frequently encountered in petrochemical production processes and have a tendency to form azeotropes, thereby complicating their separation. Consequently, achieving efficient separation of these components is essential for both environmental protection and resource conservation. In this study, a composite material comprising a carbazole-based flexible porous organic polymer (POP) and Cu-ZnIn2S4 was constructed. The prepared composite achieved 100 % selective separation of toluene from the ternary azeotrope of n-propanol/toluene/water due to π–π conjugation and weak hydrogen bonding interactions between the POP and toluene molecules. Furthermore, the adsorption capacity of the POP/Cu-ZnIn2S4 composite for toluene reached an unprecedented 3184 mg/g, surpassing the highest reported capacity to date. Additionally, the selective adsorption of toluene by the POP was coupled with in situ photocatalytic degradation of toluene by Cu-ZnIn2S4. During the photocatalytic process, photogenerated charge carriers were effectively separated and transferred via the S-scheme charge transfer pathway, leading to complete degradation of toluene within 3 min. Finally, cycling experiments demonstrated that the POP could be continuously recycled without significant loss of performance.
{"title":"Toluene-induced framework expansion in carbazole-based porous organic polymers anchored with Cu-ZnIn2S4 for ultrafast azeotropic wastewater recovery","authors":"Yingxue Zhang, Xunxun Li, Wanjun Xu, Yuxin Cheng, Shihong Dong, Najun Li, Qingfeng Xu, Hua Li, Dongyun Chen, Jianmei Lu","doi":"10.1016/j.cej.2025.162369","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162369","url":null,"abstract":"Toluene, n-propanol, and water are frequently encountered in petrochemical production processes and have a tendency to form azeotropes, thereby complicating their separation. Consequently, achieving efficient separation of these components is essential for both environmental protection and resource conservation. In this study, a composite material comprising a carbazole-based flexible porous organic polymer (POP) and Cu-ZnIn<sub>2</sub>S<sub>4</sub> was constructed. The prepared composite achieved 100 % selective separation of toluene from the ternary azeotrope of n-propanol/toluene/water due to π–π conjugation and weak hydrogen bonding interactions between the POP and toluene molecules. Furthermore, the adsorption capacity of the POP/Cu-ZnIn<sub>2</sub>S<sub>4</sub> composite for toluene reached an unprecedented 3184 mg/g, surpassing the highest reported capacity to date. Additionally, the selective adsorption of toluene by the POP was coupled with in situ photocatalytic degradation of toluene by Cu-ZnIn<sub>2</sub>S<sub>4</sub>. During the photocatalytic process, photogenerated charge carriers were effectively separated and transferred via the S-scheme charge transfer pathway, leading to complete degradation of toluene within 3 min. Finally, cycling experiments demonstrated that the POP could be continuously recycled without significant loss of performance.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"21 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784794","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}
Pub Date : 2025-04-06DOI: 10.1016/j.cej.2025.162316
Yong Zhang, Anli Yi, Yongtao Ren, Cheng Niu, Jian Jiang, Zhaoqi Zhu, Rui Jiao, Hanxue Sun, An Li
The development of multifunctional filtration materials is a major tool for air purification. Herein, two electrospun nanofibrous composite conjugated microporous polymer membranes (ENC-CMPs-M) with multilayered porous structures were synthesized by selecting different monomers via Sonogashira-Hagihara cross-coupling using PVDF/PMMA as a substrate for the separation of water-in-oil emulsions and effective filtration of PM in high humidity environments. As measured by a Karl Fischer hydrometer, the separation efficiencies of ENC-CMPs-M for gasoline and kerosene derived water-in-oil emulsions were found to be 99.99 % and 99.67 % by a gravity-driven oil–water separation process, respectively. Its permeation fluxes could reach up to 953.46 L m-2h−1. The particulate matter (PM) adsorption performance of ENC-CMPs-M was investigated by simulating the PM adsorption in air with a lighted cigarette. The ENC-CMPs-M−2 membrane showed excellent removal efficiency, i.e., the removal efficiencies were measured to be PM0.3 ≥ 99.5 % PM0.5 ≥ 99. 7 %, PM1.0 ≥ 99.6 %, PM2.5 ≥ 99.9 %, PM5.0 ≥ 99.9 %, and PM10 ≥ 99.9 %, respectively. Thanks its ultra-hydrophobicity as well as unique multilayered porous structure, even in the high humidity environment (RH: 95 ± 3 %), the efficiency of ENC-CMPs-M−2 for PM0.3, PM0.5, and PM1.0 reaches up to 99.92 %, 99.95 %, and 99.97 %, respectively, with an excellent the removal efficiency of higher than 99.99 % for PM2.5, PM5.0 and PM10. For a practical measurement by filtration of PM particles generated from vehicle exhaust gas, the removal efficiency of ENC-CMPs-M−1 and ENC-CMPs-M−2 for PM2.5-10 was calculated to be over 96 %, showing great potential for eliminating inhaled particulate matter and separation of oil/water emulsion as a kind of new advanced membrane material in complex environments by taking advantages of its simple fabrication, excellent chemical stability, and desired mechanical properties.
{"title":"In-situ preparation of CMPs based electrospun nanofibrous composite membranes for effective air filtration and oil–water separation","authors":"Yong Zhang, Anli Yi, Yongtao Ren, Cheng Niu, Jian Jiang, Zhaoqi Zhu, Rui Jiao, Hanxue Sun, An Li","doi":"10.1016/j.cej.2025.162316","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162316","url":null,"abstract":"The development of multifunctional filtration materials is a major tool for air purification. Herein, two electrospun nanofibrous composite conjugated microporous polymer membranes (ENC-CMPs-M) with multilayered porous structures were synthesized by selecting different monomers via Sonogashira-Hagihara cross-coupling using PVDF/PMMA as a substrate for the separation of water-in-oil emulsions and effective filtration of PM in high humidity environments. As measured by a Karl Fischer hydrometer, the separation efficiencies of ENC-CMPs-M for gasoline and kerosene derived water-in-oil emulsions were found to be 99.99 % and 99.67 % by a gravity-driven oil–water separation process, respectively. Its permeation fluxes could reach up to 953.46 L m<sup>-2</sup>h<sup>−1</sup>. The particulate matter (PM) adsorption performance of ENC-CMPs-M was investigated by simulating the PM adsorption in air with a lighted cigarette. The ENC-CMPs-M−2 membrane showed excellent removal efficiency, i.e., the removal efficiencies were measured to be PM<sub>0.3</sub> ≥ 99.5 % PM<sub>0.5</sub> ≥ 99. 7 %, PM<sub>1.0</sub> ≥ 99.6 %, PM<sub>2.5</sub> ≥ 99.9 %, PM<sub>5.0</sub> ≥ 99.9 %, and PM<sub>10</sub> ≥ 99.9 %, respectively. Thanks its ultra-hydrophobicity as well as unique multilayered porous structure, even in the high humidity environment (RH: 95 ± 3 %), the efficiency of ENC-CMPs-M−2 for PM<sub>0.3</sub>, PM<sub>0.5,</sub> and PM<sub>1.0</sub> reaches up to 99.92 %, 99.95 %, and 99.97 %, respectively, with an excellent the removal efficiency of higher than 99.99 % for PM<sub>2.5</sub>, PM<sub>5.0</sub> and PM<sub>10</sub>. For a practical measurement by filtration of PM particles generated from vehicle exhaust gas, the removal efficiency of ENC-CMPs-M−1 and ENC-CMPs-M−2 for PM<sub>2.5-10</sub> was calculated to be over 96 %, showing great potential for eliminating inhaled particulate matter and separation of oil/water emulsion as a kind of new advanced membrane material in complex environments by taking advantages of its simple fabrication, excellent chemical stability, and desired mechanical properties.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"34 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784778","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}
As global resource depletion intensifies, solar energy has gained widespread attention due to its vast potential. However, the inherent variability and intermittency of solar radiation emphasizes the need for energy storage. Against this backdrop, the thermoelectric devices based on phase change material (PCM) have attracted numerous attention. Currently, traditional PCMs suffer from low phase change temperatures, resulting in insufficient temperature differences for thermoelectric devices. In this work, high-density polyethylene (HDPE) is used as a medium-temperature (125-135°C) PCM, in which the polyamide 6 (PA6) particles are dispersed to prepare shape-stable phase change material (SSPCM) through tensile flow field. The HDPE/PA6 blends is combined with a MXene@PTA to produce a sandwich-structured SSPCM. The sandwich-structured SSPCM has a latent heat of more than 165 J/g with the phase change temperature of 130 °C. In the photo-thermal-electrical experiment, the SSPCM could reaches 145.4 °C, which benefits the photo-thermal-electric conversion. Notably, the sample’s power generation time under no-light conditions is extended by 16.4 % and the power generation capacity is increased by 47.6 %. Moreover, the samples maintain excellent thermal performance even after 200 thermal cycles. This work provides a promising strategy for the development of multifunctional materials capable of efficient solar energy harvesting and upgrading photo-thermal-electrical conversion, demonstrating great potential for applications in energy storage and conversion technologies.
{"title":"Sandwich-structured HDPE-based medium-temperature phase change composites with MXene interlayers for photo-thermal-electrical applications","authors":"Bin Ai, Zhigang Liu, Xinpeng Hu, Bingqing Quan, Miao Sui, Chuanbiao Zhu, Yang Xiao, Minjiang Zhang, Lewen Liu, Xiangyu Yan, Xiang Lu, Jinping Qu","doi":"10.1016/j.cej.2025.162367","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162367","url":null,"abstract":"As global resource depletion intensifies, solar energy has gained widespread attention due to its vast potential. However, the inherent variability and intermittency of solar radiation emphasizes the need for energy storage. Against this backdrop, the thermoelectric devices based on phase change material (PCM) have attracted numerous attention. Currently, traditional PCMs suffer from low phase change temperatures, resulting in insufficient temperature differences for thermoelectric devices. In this work, high-density polyethylene (HDPE) is used as a medium-temperature (125-135°C) PCM, in which the polyamide 6 (PA6) particles are dispersed to prepare shape-stable phase change material (SSPCM) through tensile flow field. The HDPE/PA6 blends is combined with a MXene@PTA to produce a sandwich-structured SSPCM. The sandwich-structured SSPCM has a latent heat of more than 165 J/g with the phase change temperature of 130 °C. In the photo-thermal-electrical experiment, the SSPCM could reaches 145.4 °C, which benefits the photo-thermal-electric conversion. Notably, the sample’s power generation time under no-light conditions is extended by 16.4 % and the power generation capacity is increased by 47.6 %. Moreover, the samples maintain excellent thermal performance even after 200 thermal cycles. This work provides a promising strategy for the development of multifunctional materials capable of efficient solar energy harvesting and upgrading photo-thermal-electrical conversion, demonstrating great potential for applications in energy storage and conversion technologies.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"183 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784793","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}
Metal-organic frameworks (MOFs) have shown fascinating application prospects in gas storage and separation over the past two decades. However, integrating MOFs with high stability and efficient gas separation performance remains a great challenge, especially for the MOFs bearing open metal sites. Herein, we present an overlapping-ligand strategy to construct stable MOFs for highly efficient C2H2 / CO2 separation. A pair of supramolecular isomers, i.e. FJI-W8-A and FJI-W8-B, has been successfully synthesized based on copper paddlewheels and carboxylic acid ligands. The phenomenon of supramolecular isomerism mainly arises from the difference in the conformation of the ligand during the assembly process. In FJI-W8-A, the ligand adopts an overlapping assembly mode, whereas in FJI-W8-B the ligand is not stacked. Consequently, FJI-W8-A exhibits significantly enhanced stability compared with FJI-W8-B, maintaining its crystalline structure and porosity even being exposed in water. Benefiting from the combined features of good stability, high porosity and abundant open metal sites, FJI-W8-A shows excellent performance in C2H2 / CO2 separation even under humid conditions, which has been demonstrated by the practical breakthrough experiments.
{"title":"Overlapping-ligand strategy in copper-paddlewheel supramolecular isomers for enhanced stability and efficient C2H2/CO2 separation","authors":"Hengbo Li, Cheng Chen, Zheng Liu, Shuixiang Zou, Daqiang Yuan, Mingyan Wu","doi":"10.1016/j.cej.2025.162351","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162351","url":null,"abstract":"Metal-organic frameworks (MOFs) have shown fascinating application prospects in gas storage and separation over the past two decades. However, integrating MOFs with high stability and efficient gas separation performance remains a great challenge, especially for the MOFs bearing open metal sites. Herein, we present an overlapping-ligand strategy to construct stable MOFs for highly efficient C<sub>2</sub>H<sub>2</sub> / CO<sub>2</sub> separation. A pair of supramolecular isomers, i.e. FJI-W8-A and FJI-W8-B, has been successfully synthesized based on copper paddlewheels and carboxylic acid ligands. The phenomenon of supramolecular isomerism mainly arises from the difference in the conformation of the ligand during the assembly process. In FJI-W8-A, the ligand adopts an overlapping assembly mode, whereas in FJI-W8-B the ligand is not stacked. Consequently, FJI-W8-A exhibits significantly enhanced stability compared with FJI-W8-B, maintaining its crystalline structure and porosity even being exposed in water. Benefiting from the combined features of good stability, high porosity and abundant open metal sites, FJI-W8-A shows excellent performance in C<sub>2</sub>H<sub>2</sub> / CO<sub>2</sub> separation even under humid conditions, which has been demonstrated by the practical breakthrough experiments.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"37 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782941","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}
Pub Date : 2025-04-05DOI: 10.1016/j.cej.2025.162311
Jizu Ma, Wenzheng Wang, Peng Yu, Zhanjun Wu, Yiming Xiang, Yizhou Zhu, Hang Liang, Lei Tan
Advanced conductive foams as pressure sensors have substantial potential for wearable devices. Ideal wearable pressure sensors are often expected to simultaneously achieve, such as high sensitivity, wide sensing range, long-term stability, and sterility property. MXene-based flexible pressure sensors have garnered widespread attention in wearable electronics due to its high conductivity, rich surface terminal groups and hydrophilicity. However, the susceptibility of MXene to oxidation seriously weakened the effectiveness of sensors during long-term practical use. In this study, silver nanoparticles decorated alkaline lignin (AL-Ag), MXene and nature rubber latex (NR) are co-foaming to fabricate a flexible pressure sensor. As an inexpensive and abundant industrial byproduct, AL with abundant phenolic hydroxyl group can effectively prevents the oxidation of MXene through its antioxidant ability and the hydrogen bonding interactions with MXene, which exhibits negligible sensitivity attenuation after 30 days’ open placement. The AL-Ag/MXene/NR foam has a great performance in sensing applications, exhibiting both high sensitivity (16.05 kPa−1) and broad response range (0 ∼ 200 kPa), which is better than most reported conductive foams. This foam sensor is capable of monitoring human motion and sensing spatial pressure distribution. Moreover, due to the synergistic antibacterial behaviors of photothermal/ion (Ag+@Zn2+) effect, the AL-Ag/MXene/NR foam can rapidly realize sterilization under sunlight. This work provides a promising strategy for addressing the stability issues of MXene composites using lignin, which shows a great potential in wearable and motion monitoring fields. This work not only provides a general approach for designing long-term stable MXene-based flexible pressure sensors with high comprehensive performance, but also raise the sustainable high-value utilization of lignin for sensors applications.
{"title":"Lignin-optimized MXene/foam pressure sensors with high-sensitivity and robust sunlight sterilization","authors":"Jizu Ma, Wenzheng Wang, Peng Yu, Zhanjun Wu, Yiming Xiang, Yizhou Zhu, Hang Liang, Lei Tan","doi":"10.1016/j.cej.2025.162311","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162311","url":null,"abstract":"Advanced conductive foams as pressure sensors have substantial potential for wearable devices. Ideal wearable pressure sensors are often expected to simultaneously achieve, such as high sensitivity, wide sensing range, long-term stability, and sterility property. MXene-based flexible pressure sensors have garnered widespread attention in wearable electronics due to its high conductivity, rich surface terminal groups and hydrophilicity. However, the susceptibility of MXene to oxidation seriously weakened the effectiveness of sensors during long-term practical use. In this study, silver nanoparticles decorated alkaline lignin (AL-Ag), MXene and nature rubber latex (NR) are co-foaming to fabricate a flexible pressure sensor. As an inexpensive and abundant industrial byproduct, AL with abundant phenolic hydroxyl group can effectively prevents the oxidation of MXene through its antioxidant ability and the hydrogen bonding interactions with MXene, which exhibits negligible sensitivity attenuation after 30 days’ open placement. The AL-Ag/MXene/NR foam has a great performance in sensing applications, exhibiting both high sensitivity (16.05 kPa<sup>−1</sup>) and broad response range (0 ∼ 200 kPa), which is better than most reported conductive foams. This foam sensor is capable of monitoring human motion and sensing spatial pressure distribution. Moreover, due to the synergistic antibacterial behaviors of photothermal/ion (Ag<sup>+</sup>@Zn<sup>2+</sup>) effect, the AL-Ag/MXene/NR foam can rapidly realize sterilization under sunlight. This work provides a promising strategy for addressing the stability issues of MXene composites using lignin, which shows a great potential in wearable and motion monitoring fields. This work not only provides a general approach for designing long-term stable MXene-based flexible pressure sensors with high comprehensive performance, but also raise the sustainable high-value utilization of lignin for sensors applications.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"34 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782942","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}
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