Hexavalent chromium (Cr(VI)) poses a significant ecosystem risk due to its high mobility and stability. Nanoadsorbents possess high adsorption capacity but complex solid–liquid separation procedures. It is an unresolved challenge to design an adsorbent with both capabilities. Here, we covalently linked metal–organic frameworks (MOFs) and ethylene imine polymer (PEI) to chitosan hydrogel beads (3 mm). Assists with the ice template method to construct a multistage pore network structure of aerogel beads (CTS-U-E) for purifying Cr(VI) wastewater. The rich multistage pore network and high specific surface area of CTS-U-E (130.91 m2 g−1) enable fast adsorption kinetics and excellent selectivity. Its maximum adsorption capacity of 471.5 mg g−1 is 2.47 times greater than that of commercial adsorbents and exceeds most reported nanoadsorbents. Impressively, after six cycles of adsorption tests, the Cr(VI) removal rate of CTS-U-E still reached 79 %. CTS-U-E is considerably more cost-effective than commercial activated carbon and resin, owing to its inexpensive raw materials and superior recycling capabilities. Density functional theory reveals that the strong affinity of N, O, and methylene for Cr(VI) results in their role as natural anchor points for efficient Cr(VI) adsorption. The reaction of Cr(VI) with amines to form highly active intermediates may further lead to ultra-high Cr(VI) removal. This study inspires a promising route for developing high-adsorption materials for Cr(VI) wastewater treatment and offers new insights into adsorption mechanisms.
{"title":"Bio-Based aerogel beads with multistage pore network structure for Cr(VI) removal using ice template method","authors":"Ya-Ge Wu, Qi Cao, Shuang Dai, Jing Zhao, Ya-Juan Cai, Chuan-Zhe Zhao, Zi-Hao Yang, Yi-Xing Sun, Ting Yue, Ke-Xiao Sang, Jing-Gang Gai, Ming-Ju Tao","doi":"10.1016/j.cej.2025.159983","DOIUrl":"https://doi.org/10.1016/j.cej.2025.159983","url":null,"abstract":"Hexavalent chromium (Cr(VI)) poses a significant ecosystem risk due to its high mobility and stability. Nanoadsorbents possess high adsorption capacity but complex solid–liquid separation procedures. It is an unresolved challenge to design an adsorbent with both capabilities. Here, we covalently linked metal–organic frameworks (MOFs) and ethylene imine polymer (PEI) to chitosan hydrogel beads (3 mm). Assists with the ice template method to construct a multistage pore network structure of aerogel beads (CTS-U-E) for purifying Cr(VI) wastewater. The rich multistage pore network and high specific surface area of CTS-U-E (130.91 m<sup>2</sup> g<sup>−1</sup>) enable fast adsorption kinetics and excellent selectivity. Its maximum adsorption capacity of 471.5 mg g<sup>−1</sup> is 2.47 times greater than that of commercial adsorbents and exceeds most reported nanoadsorbents. Impressively, after six cycles of adsorption tests, the Cr(VI) removal rate of CTS-U-E still reached 79 %. CTS-U-E is considerably more cost-effective than commercial activated carbon and resin, owing to its inexpensive raw materials and superior recycling capabilities. Density functional theory reveals that the strong affinity of N, O, and methylene for Cr(VI) results in their role as natural anchor points for efficient Cr(VI) adsorption. The reaction of Cr(VI) with amines to form highly active intermediates may further lead to ultra-high Cr(VI) removal. This study inspires a promising route for developing high-adsorption materials for Cr(VI) wastewater treatment and offers new insights into adsorption mechanisms.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"27 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050581","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}
Herein, a biomimetic approach is developed to improve the phosphatase-like catalytic activity of a metal–organic framework (MOF) nanozyme. Specifically, biomimetic Zn sites, featuring a coordination environment similar to that of natural phosphatase, were covalently anchored into UiO-66-NH2 nanozyme through a step-by-step modification process. Compared with pristine UiO-66-NH2, the resultant 66-IS-Zn exhibited a 130-fold increase in Kcat. Mechanism studies suggest that the anchoring of Zn sites can only enhance the catalytic performance of MOFs that possess intrinsic phosphatase-like activity, and the enhancement of catalytic activity strongly relies on the coordination environment of Zn sites, which involves the co-coordination of N and O with Zn. Besides the excellent phosphatase-like activity, 66-IS-Zn also exhibited enhanced intrinsic fluorescence emission and high phosphodiesterase-like catalytic activity. Consequently, 66-IS-Zn was used as the sensing unit to construct a three-channel sensor array for distinguishing organophosphorus pesticides (OPs). This sensor array can successfully distinguish six OPs and allow the quantification of profenofos and phoxim. Moreover, the binary mixtures of OPs and cherry tomato samples were precisely discriminated without any overlapping, indicating the reliability and practicability of the sensor array.
{"title":"Anchoring biomimetic Zn site in metal–organic framework nanozyme to enhance phosphatase-like catalytic activity for discrimination of organophosphorus pesticides","authors":"Yusha Huang, Longcheng Gong, Chengli Xie, Wenling Qin, Min Wang, Lianzhe Hu, Zhining Xia","doi":"10.1016/j.cej.2025.160046","DOIUrl":"https://doi.org/10.1016/j.cej.2025.160046","url":null,"abstract":"Herein, a biomimetic approach is developed to improve the phosphatase-like catalytic activity of a metal–organic framework (MOF) nanozyme. Specifically, biomimetic Zn sites, featuring a coordination environment similar to that of natural phosphatase, were covalently anchored into UiO-66-NH<sub>2</sub> nanozyme through a step-by-step modification process. Compared with pristine UiO-66-NH<sub>2</sub>, the resultant 66-IS-Zn exhibited a 130-fold increase in <em>K</em><sub>cat</sub>. Mechanism studies suggest that the anchoring of Zn sites can only enhance the catalytic performance of MOFs that possess intrinsic phosphatase-like activity, and the enhancement of catalytic activity strongly relies on the coordination environment of Zn sites, which involves the co-coordination of N and O with Zn. Besides the excellent phosphatase-like activity, 66-IS-Zn also exhibited enhanced intrinsic fluorescence emission and high phosphodiesterase-like catalytic activity. Consequently, 66-IS-Zn was used as the sensing unit to construct a three-channel sensor array for distinguishing organophosphorus pesticides (OPs). This sensor array can successfully distinguish six OPs and allow the quantification of profenofos and phoxim. Moreover, the binary mixtures of OPs and cherry tomato samples were precisely discriminated without any overlapping, indicating the reliability and practicability of the sensor array.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"25 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050583","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 : 2025-01-28DOI: 10.1016/j.cej.2025.160038
Yuxin Liu, Youxu Yu, Jinwang Li, Xun Zhu, Dingding Ye, Yang Yang, Zhefei Pan, Rong Chen, Qiang Liao
In this work, a Z-scheme heterojunction CdS@TNTs/Ti mesh photoanode is developed and incorporated into a photocatalytic fuel cell (PFC) with the addition of sulfite/sulfide, forming a sulfite/sulfide-assisted PFC with the CdS@TNTs/Ti mesh photoanode. Such a photoanode enhances not only the light absorption range but also the charge separation with maintaining redox potentials. The addition of sulfite/sulfide greatly improves the photoanode stability and the solution conductivity. More importantly, strong synergistic effect between the activation of sulfite/sulfide and Z-scheme heterojunction having a high intrinsic activity allows for more reactive radicals to be generated, spreads the reaction region from the photoanode interface to the entire system and suppresses the charge recombination. Thus, the CdS@TNTs/Ti mesh photoanode exhibits superior photocatalytic/photoelectrochemical performances in the presence of sulfite/sulfide. The sulfite/sulfide-assisted PFC with the Z-scheme heterojunction CdS@TNTs/Ti mesh photoanode yields the degradation efficiency, maximal power density and short current density as high as 80.25 %, 0.90 mW/cm2, and 2.58 mA/cm2, respectively, substantially exceeding the PFC without sulfite/sulfide. This work not only enhances the comprehension of the synergistic enhancement mechanism by inducing sulfite/sulfide, but also provides a promising and green choice for the development of the PFC system to efficiently remove pollutants in sewage and generate electricity concurrently.
{"title":"Enhanced performance and stability of sulfite/sulfide-assisted photocatalytic fuel cell with CdS@TNTs/Ti mesh photoanode","authors":"Yuxin Liu, Youxu Yu, Jinwang Li, Xun Zhu, Dingding Ye, Yang Yang, Zhefei Pan, Rong Chen, Qiang Liao","doi":"10.1016/j.cej.2025.160038","DOIUrl":"https://doi.org/10.1016/j.cej.2025.160038","url":null,"abstract":"In this work, a Z-scheme heterojunction CdS@TNTs/Ti mesh photoanode is developed and incorporated into a photocatalytic fuel cell (PFC) with the addition of sulfite/sulfide, forming a sulfite/sulfide-assisted PFC with the CdS@TNTs/Ti mesh photoanode. Such a photoanode enhances not only the light absorption range but also the charge separation with maintaining redox potentials. The addition of sulfite/sulfide greatly improves the photoanode stability and the solution conductivity. More importantly, strong synergistic effect between the activation of sulfite/sulfide and Z-scheme heterojunction having a high intrinsic activity allows for more reactive radicals to be generated, spreads the reaction region from the photoanode interface to the entire system and suppresses the charge recombination. Thus, the CdS@TNTs/Ti mesh photoanode exhibits superior photocatalytic/photoelectrochemical performances in the presence of sulfite/sulfide. The sulfite/sulfide-assisted PFC with the Z-scheme heterojunction CdS@TNTs/Ti mesh photoanode yields the degradation efficiency, maximal power density and short current density as high as 80.25 %, 0.90 mW/cm<sup>2</sup>, and 2.58 mA/cm<sup>2</sup>, respectively, substantially exceeding the PFC without sulfite/sulfide. This work not only enhances the comprehension of the synergistic enhancement mechanism by inducing sulfite/sulfide, but also provides a promising and green choice for the development of the PFC system to efficiently remove pollutants in sewage and generate electricity concurrently.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"148 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050752","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 : 2025-01-28DOI: 10.1016/j.cej.2025.159994
Jingang Wang, Yu Liu, Xuejiao Tang, Yanmei Sun, Fei Li
The decomposition of toxic phosphine (PH3) gas into elemental phosphorus is a high value-added way of resource recovery and pollution control for phosphorus containing substances derived from the discharge of domestic sewage, industrial wastewater and exhaust gas. In this paper, the photocatalysis method was firstly introduced to decompose PH3 of 1.0 v/v%. The halloysite nanotubes co-doped by Ni and Fe3O4 (Fe3O4-Ni@HNTs-NH2) was innovatively prepared via electroless plating-precipitation method and further used as the photocatalyst for PH3 decomposition, and it was found that the photoinitiation by 395 nm light (L-395) significantly improved the decomposition efficiency of PH3 with Fe3O4-Ni@HNTs-NH2, which was much higher than that by 365 nm light. The results of the absorption coefficient analysis, X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectra indicated that the lower bandgap of Fe3O4 contributed to the absorption of L-395 and formation of oxygen vacancy, thereby promoting photoelectron migration, activating and breaking PH bonds in PH3. The reaction mechanism was studied using first principles theory calculations. It is verified that there is a synergistic catalytic effect between Ni and Fe3O4, and Fe3O4 plays a major role in the photocatalysis, while the bonding orbitals of the Ni site having lower energies exhibit a better non-photocatalytic performance than Fe3O4. The catalytic decomposition mechanisms of PH3 on Fe3O4-Ni@HNTs-NH2 in photocatalytic and non-photocatalytic ways have been proposed. The halloysite nanotubes co-doped by Ni and Fe3O4 is an efficient and environment-friendly catalyst for both abatement and utilization of industrial waste PH3 gas.
{"title":"Photocatalytic decomposition of toxic phosphine gas over halloysite nanotubes co-doped by Ni and Fe3O4 and theory calculation of its mechanism","authors":"Jingang Wang, Yu Liu, Xuejiao Tang, Yanmei Sun, Fei Li","doi":"10.1016/j.cej.2025.159994","DOIUrl":"https://doi.org/10.1016/j.cej.2025.159994","url":null,"abstract":"The decomposition of toxic phosphine (PH<sub>3</sub>) gas into elemental phosphorus is a high value-added way of resource recovery and pollution control for phosphorus containing substances derived from the discharge of domestic sewage, industrial wastewater and exhaust gas. In this paper, the photocatalysis method was firstly introduced to decompose PH<sub>3</sub> of 1.0 v/v%. The halloysite nanotubes co-doped by Ni and Fe<sub>3</sub>O<sub>4</sub> (Fe<sub>3</sub>O<sub>4</sub>-Ni@HNTs-NH<sub>2</sub>) was innovatively prepared via electroless plating-precipitation method and further used as the photocatalyst for PH<sub>3</sub> decomposition, and it was found that the photoinitiation by 395 nm light (L-395) significantly improved the decomposition efficiency of PH<sub>3</sub> with Fe<sub>3</sub>O<sub>4</sub>-Ni@HNTs-NH<sub>2</sub>, which was much higher than that by 365 nm light. The results of the absorption coefficient analysis, X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectra indicated that the lower bandgap of Fe<sub>3</sub>O<sub>4</sub> contributed to the absorption of L-395 and formation of oxygen vacancy, thereby promoting photoelectron migration, activating and breaking P<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>H bonds in PH<sub>3</sub>. The reaction mechanism was studied using first principles theory calculations. It is verified that there is a synergistic catalytic effect between Ni and Fe<sub>3</sub>O<sub>4</sub>, and Fe<sub>3</sub>O<sub>4</sub> plays a major role in the photocatalysis, while the bonding orbitals of the Ni site having lower energies exhibit a better non-photocatalytic performance than Fe<sub>3</sub>O<sub>4</sub>. The catalytic decomposition mechanisms of PH<sub>3</sub> on Fe<sub>3</sub>O<sub>4</sub>-Ni@HNTs-NH<sub>2</sub> in photocatalytic and non-photocatalytic ways have been proposed. The halloysite nanotubes co-doped by Ni and Fe<sub>3</sub>O<sub>4</sub> is an efficient and environment-friendly catalyst for both abatement and utilization of industrial waste PH<sub>3</sub> gas.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"28 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050686","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 : 2025-01-28DOI: 10.1016/j.cej.2025.159872
Meng Zhang, Ting Chen, Ting Xu, Han Zhang, Xuan Wang, Junjie Qi, Qiang Dong, Liyu Zhu, Zhanhui Yuan, Chuanling Si
In the realm of sustainable materials, nanocellulose has emerged as a particularly noteworthy contender, garnering considerable attention with exceptional mechanical properties, biocompatibility, and renewability. Within the domain of conductive hydrogels, nanocellulose distinctive characteristics position it as a preeminent reinforcing and dispersing agent, thereby markedly augmenting the overall performance of hydrogels. This article reviews the progress of nanocellulose applications in conductive hydrogels and discusses its mechanism of action as reinforcing and dispersing agents in detail, as well as the preparation methods with different conductive fillers (carbon materials, conductive polymers, metal nanoparticles and metal ions). Additionally, the extant research findings on the mechanical, self-healing, self-adhesion and freeze resistance properties of the conductive hydrogels are comprehensively introduced. In conclusion, the article provides a comprehensive outlook on the ongoing issues of nanocellulose-based conductive hydrogels and their possible future directions.
{"title":"Functionalities and properties of conductive hydrogel with nanocellulose integration","authors":"Meng Zhang, Ting Chen, Ting Xu, Han Zhang, Xuan Wang, Junjie Qi, Qiang Dong, Liyu Zhu, Zhanhui Yuan, Chuanling Si","doi":"10.1016/j.cej.2025.159872","DOIUrl":"https://doi.org/10.1016/j.cej.2025.159872","url":null,"abstract":"In the realm of sustainable materials, nanocellulose has emerged as a particularly noteworthy contender, garnering considerable attention with exceptional mechanical properties, biocompatibility, and renewability. Within the domain of conductive hydrogels, nanocellulose distinctive characteristics position it as a preeminent reinforcing and dispersing agent, thereby markedly augmenting the overall performance of hydrogels. This article reviews the progress of nanocellulose applications in conductive hydrogels and discusses its mechanism of action as reinforcing and dispersing agents in detail, as well as the preparation methods with different conductive fillers (carbon materials, conductive polymers, metal nanoparticles and metal ions). Additionally, the extant research findings on the mechanical, self-healing, self-adhesion and freeze resistance properties of the conductive hydrogels are comprehensively introduced. In conclusion, the article provides a comprehensive outlook on the ongoing issues of nanocellulose-based conductive hydrogels and their possible future directions.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"38 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050750","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 : 2025-01-28DOI: 10.1016/j.cej.2025.160003
Shanshan Zhang, Lijie Yu, Yi Lv, Tianyu Zeng, Haobo Hou, Jirong Lan
A method of calcination activation-chemical separation-carbonization precipitation was developed for selective recovery of Al from high-alumina fly ash (HAFA). Specifically, calcium carbide slag, CaF2 and HAFA were used for mechanical mixing and calcination, and then, Al was leached with sodium carbonate solution, followed by the use of CaO to separation and removal of Si, the next step of filtration to remove the residue to obtain, and finally, the precipitation recovery of Al was realized by the passage of CO2 into the solution. Consequently, the formation of soluble calcium aluminate (C12A7) and insoluble dicalcium silicate (C2S) is promoted, effectively achieving the separation of silicon and aluminum during the calcination process. Desiliconization and carbonation of the leaching solution yielded aluminum hydroxide with a conversion rate of 96.67 % and a purity of 98.40 %. Pilot-scale experiments achieve an overall aluminum extraction rate of over 80 % and an aluminum purity of 98 %. In addition, the process absorbs 0.564 tons of CO2 per ton of Al(OH)3 produced. This study highlights the feasibility of large-scale collaborative carbon sequestration and efficient HAFA resource treatment.
{"title":"High efficiency selective recovery of Al from high-alumina fly ash by multistage activation and carbonation on-site application scale","authors":"Shanshan Zhang, Lijie Yu, Yi Lv, Tianyu Zeng, Haobo Hou, Jirong Lan","doi":"10.1016/j.cej.2025.160003","DOIUrl":"https://doi.org/10.1016/j.cej.2025.160003","url":null,"abstract":"A method of calcination activation-chemical separation-carbonization precipitation was developed for selective recovery of Al from high-alumina fly ash (HAFA). Specifically, calcium carbide slag, CaF<sub>2</sub> and HAFA were used for mechanical mixing and calcination, and then, Al was leached with sodium carbonate solution, followed by the use of CaO to separation and removal of Si, the next step of filtration to remove the residue to obtain, and finally, the precipitation recovery of Al was realized by the passage of CO<sub>2</sub> into the solution. Consequently, the formation of soluble calcium aluminate (C<sub>12</sub>A<sub>7</sub>) and insoluble dicalcium silicate (C<sub>2</sub>S) is promoted, effectively achieving the separation of silicon and aluminum during the calcination process. Desiliconization and carbonation of the leaching solution yielded aluminum hydroxide with a conversion rate of 96.67 % and a purity of 98.40 %. Pilot-scale experiments achieve an overall aluminum extraction rate of over 80 % and an aluminum purity of 98 %. In addition, the process absorbs 0.564 tons of CO<sub>2</sub> per ton of Al(OH)<sub>3</sub> produced. This study highlights the feasibility of large-scale collaborative carbon sequestration and efficient HAFA resource treatment.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"23 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050582","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 : 2025-01-28DOI: 10.1016/j.cej.2025.160019
Hong Wang, Mingjie Gao, Linman Zhang, Ziyue Su, Chaoyu Chen, Weijun Yang, Pengwu Xu, Deyu Niu, Pibo Ma, Piming Ma
Elastomers with dynamic covalent bonds are typically used to develop self-healing flexible control panels, however, their self-healing efficiency is low at low temperatures which hampers the stable operation and durability of the control panels. This work used a new strategy to achieve low-temperature self-healing in bio-based polyurethane elastomers (PDLBE) by designing a dynamic van der Waals force network. The elastomers are synthesized by using biobased monomers containing a double-alkane-tailed ringing unit and show self-healing efficiencies close to 90 % even under low temperature (−20 °C), supercooled brine (30 % NaCl @ −20 °C), and alkali (pH = 14) conditions. In addition, the PDLBE exhibits rapid self-healing capability, superior elongation rate (12,000 %), and reprocessability. Both experimental and molecular simulation results indicate that the low-temperature self-healing properties are mainly attributed to the abundant vdW forces and self-plasticization generated by the double-alkane-tailed ringing unit. Subsequently, low-temperature triboelectric nanogenerator (LT-TENG) and LT-TENG-based flexible control panels are successfully made from the elastomers, showing a recovery of 97 % at − 20 ℃ and a stable output (∼13 mW/m2) at − 30 ℃ after damage and even after 1200 cycles. This study presents a novel route for the preparation of low-temperature self-healable bio-elastomers and may expand their application in TENGs and flexible control panels in harsh environments.
{"title":"Advanced low-temperature self-healable bio-polyurethanes with double-alkane-tailed ringing units for applications in self-powered flexible control panels","authors":"Hong Wang, Mingjie Gao, Linman Zhang, Ziyue Su, Chaoyu Chen, Weijun Yang, Pengwu Xu, Deyu Niu, Pibo Ma, Piming Ma","doi":"10.1016/j.cej.2025.160019","DOIUrl":"https://doi.org/10.1016/j.cej.2025.160019","url":null,"abstract":"Elastomers with dynamic covalent bonds are typically used to develop self-healing flexible control panels, however, their self-healing efficiency is low at low temperatures which hampers the stable operation and durability of the control panels. This work used a new strategy to achieve low-temperature self-healing in bio-based polyurethane elastomers (PDLBE) by designing a dynamic van der Waals force network. The elastomers are synthesized by using biobased monomers containing a double-alkane-tailed ringing unit and show self-healing efficiencies close to 90 % even under low temperature (−20 °C), supercooled brine (30 % NaCl @ −20 °C), and alkali (pH = 14) conditions. In addition, the PDLBE exhibits rapid self-healing capability, superior elongation rate (12,000 %), and reprocessability. Both experimental and molecular simulation results indicate that the low-temperature self-healing properties are mainly attributed to the abundant vdW forces and self-plasticization generated by the double-alkane-tailed ringing unit. Subsequently, low-temperature triboelectric nanogenerator (LT-TENG) and LT-TENG-based flexible control panels are successfully made from the elastomers, showing a recovery of 97 % at − 20 ℃ and a stable output (∼13 mW/m<sup>2</sup>) at − 30 ℃ after damage and even after 1200 cycles. This study presents a novel route for the preparation of low-temperature self-healable bio-elastomers and may expand their application in TENGs and flexible control panels in harsh environments.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"40 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050753","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 : 2025-01-28DOI: 10.1016/j.cej.2025.159917
Xikui Wang, Hong Luo, Ningkang Luo, Han Wei, Xueqiu Zhou, Bingli Qin, Yi Mei, Moyuan Cao, Youfa Zhang
The scarcity of water represents a significant challenge confronting the global community. One of the viable strategies to mitigate the water crisis involves the extraction of moisture from the atmosphere via bionics techniques. Within this domain, the emulation of one-dimensional (1D) biological structures, such as fibers inspired by the principles of spider silk or other organisms, emerges as a pivotal approach within the field of bionics. This paper provides a comprehensive review of the water harvesting mechanisms inherent to bioinspired 1D structures, examining the factors that influence droplet capture, dropwise condensation, droplet transport, and removal. Furthermore, it summarizes the primary water harvesting processes of bionic 1D structures and delineates methods to enhance the efficiency of water collection. Subsequent sections of this paper explore the water collection performance and structural optimization of various artificial 1D structures. In conclusion, the paper encapsulates the applications of bioinspired 1D structures, proposing directions for improvement and future developmental prospects.
{"title":"Bioinspired 1D structures for water harvesting: Theory, design and application","authors":"Xikui Wang, Hong Luo, Ningkang Luo, Han Wei, Xueqiu Zhou, Bingli Qin, Yi Mei, Moyuan Cao, Youfa Zhang","doi":"10.1016/j.cej.2025.159917","DOIUrl":"https://doi.org/10.1016/j.cej.2025.159917","url":null,"abstract":"The scarcity of water represents a significant challenge confronting the global community. One of the viable strategies to mitigate the water crisis involves the extraction of moisture from the atmosphere via bionics techniques. Within this domain, the emulation of one-dimensional (1D) biological structures, such as fibers inspired by the principles of spider silk or other organisms, emerges as a pivotal approach within the field of bionics. This paper provides a comprehensive review of the water harvesting mechanisms inherent to bioinspired 1D structures, examining the factors that influence droplet capture, dropwise condensation, droplet transport, and removal. Furthermore, it summarizes the primary water harvesting processes of bionic 1D structures and delineates methods to enhance the efficiency of water collection. Subsequent sections of this paper explore the water collection performance and structural optimization of various artificial 1D structures. In conclusion, the paper encapsulates the applications of bioinspired 1D structures, proposing directions for improvement and future developmental prospects.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"23 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050754","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}
Triboelectric nanogenerators (TENGs) have been widely used to harvest irregular mechanical energy generated by human activities to power low-power wearable electronic devices due to their excellent electrical output performance, simple structure, high portability, and low cost. However, ambient humidity can significantly affect the surface charges of triboelectric materials and the electrical output stability of TENGs, which greatly limits their application. Herein, we designed a flexible humidity-resistant TENG with excellent electrical output stability based on zinc oxide nanorods@polyacrylonitrile (ZnO@PAN) nanofiber membrane modified with 1H,1H,2H,2H-Perfluorooctyltriethoxysilane (POTS). ZnO nanorods and POTS modification enhanced surface friction and the electrical output performance of the TENG in high humidity environments. The power density of as-prepared TENG reached 270.6 μW/cm2 at the load resistance of 3.5 MΩ. Moreover, compared with the ZnO@PAN-based TENG, this humidity-resistant TENG showed lower electrical loss and shorter recovery time in the humidified state. It also exhibited excellent electrical output stability under the influence of continuous humidification. The pulse electrical signal generated by this humidity-resistant TENG could intermittently light up 54 LEDs at a relative humidity of 80 %. Furthermore, the POTS/ZnO@PAN-PDMS TENG was used as a self-powered sensor for motion monitoring and haptic sensing in an environment with a relative humidity of 70 %, which exhibits good electromechanical conversion performance and motion monitoring capability in high humidity environments, greatly broadening the application range of TENGs.
{"title":"A flexible humidity-resistant nanofiber-based triboelectric nanogenerator with high electrical output stability as self-powered sensors for motion monitoring","authors":"Yue Sun, Zicheng Qian, Yuna Wang, Yaping Li, Yide Zheng, Yong Liu","doi":"10.1016/j.cej.2025.159845","DOIUrl":"https://doi.org/10.1016/j.cej.2025.159845","url":null,"abstract":"Triboelectric nanogenerators (TENGs) have been widely used to harvest irregular mechanical energy generated by human activities to power low-power wearable electronic devices due to their excellent electrical output performance, simple structure, high portability, and low cost. However, ambient humidity can significantly affect the surface charges of triboelectric materials and the electrical output stability of TENGs, which greatly limits their application. Herein, we designed a flexible humidity-resistant TENG with excellent electrical output stability based on zinc oxide nanorods@polyacrylonitrile (ZnO@PAN) nanofiber membrane modified with 1H,1H,2H,2H-Perfluorooctyltriethoxysilane (POTS). ZnO nanorods and POTS modification enhanced surface friction and the electrical output performance of the TENG in high humidity environments. The power density of as-prepared TENG reached 270.6 μW/cm<sup>2</sup> at the load resistance of 3.5 MΩ. Moreover, compared with the ZnO@PAN-based TENG, this humidity-resistant TENG showed lower electrical loss and shorter recovery time in the humidified state. It also exhibited excellent electrical output stability under the influence of continuous humidification. The pulse electrical signal generated by this humidity-resistant TENG could intermittently light up 54 LEDs at a relative humidity of 80 %. Furthermore, the POTS/ZnO@PAN-PDMS TENG was used as a self-powered sensor for motion monitoring and haptic sensing in an environment with a relative humidity of 70 %, which exhibits good electromechanical conversion performance and motion monitoring capability in high humidity environments, greatly broadening the application range of TENGs.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"119 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050751","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 : 2025-01-27DOI: 10.1016/j.cej.2025.159767
Cai-Xia Li, Wen-Wu Liu, Shi-Ji Da, Ling-Bin Kong
Carbon-based hole layer-free perovskite solar cells (PSCs) have excellent performance in work function matching, hydrophobicity, electrical conductivity, and relatively low cost, which is a competitive alternative. However, internal defects dramatically affect the stability of PSCs. Especially the iodine vacancy defect of Pb-I terminal has a lower formation energy, which is easier to form and exist stably. In this work, a few additives of p-Bromoaniline (BrC6H4NH2) were introduced to dynamically self-healing defects while capturing the migrating I− ions in perovskite. Under outdoor illumination, most of the C-Br bonds in p-Bromoaniline are activated and broken, resulting in Br− ions and aniline cations (C6H4NH2+). As Br− ions with a smaller radius preferentially adsorb and passivate the iodine vacancy at the Pb-I end. Additionally, the C6H4NH2+ cation captured I− ions migrating from the perovskite, preventing further chemical reactions of the halogen ions when exposed to light, thus improving the stability of the PSCs through a dual protection mechanism. Under light/dark conditions, by orchestrating the precise cleavage and subsequent reformation of C-X (X = Br, I) bonds, X− ions can undergo repeated cycles to facilitate a dynamic, cyclic self-repair mechanism of iodine vacancy defects. The result revealed that photoelectric conversion efficiency (PCE) of p-Bromoaniline-modified PSCs increased from 13.46 % to 17.18 %. The unencapsulated PSCs maintained a steady-state output power of 83.7 % under AM 1.5 illumination for 40 days at room temperature and RH 60 %.
{"title":"Improved free iodine capture by light-driven carbon-halogen bond cleavage in perovskite solar cells with dynamic self-healing ability","authors":"Cai-Xia Li, Wen-Wu Liu, Shi-Ji Da, Ling-Bin Kong","doi":"10.1016/j.cej.2025.159767","DOIUrl":"https://doi.org/10.1016/j.cej.2025.159767","url":null,"abstract":"Carbon-based hole layer-free perovskite solar cells (PSCs) have excellent performance in work function matching, hydrophobicity, electrical conductivity, and relatively low cost, which is a competitive alternative. However, internal defects dramatically affect the stability of PSCs. Especially the iodine vacancy defect of Pb-I terminal has a lower formation energy, which is easier to form and exist stably. In this work, a few additives of p-Bromoaniline (BrC<sub>6</sub>H<sub>4</sub>NH<sub>2</sub>) were introduced to dynamically self-healing defects while capturing the migrating I<sup>−</sup> ions in perovskite. Under outdoor illumination, most of the <em>C-Br</em> bonds in p-Bromoaniline are activated and broken, resulting in <em>Br<sup>−</sup></em> ions and aniline cations (C<sub>6</sub>H<sub>4</sub>NH<sub>2</sub><sup>+</sup>). As <em>Br<sup>−</sup></em> ions with a smaller radius preferentially adsorb and passivate the iodine vacancy at the Pb-I end. Additionally, the C<sub>6</sub>H<sub>4</sub>NH<sub>2</sub><sup>+</sup> cation captured I<sup>−</sup> ions migrating from the perovskite, preventing further chemical reactions of the halogen ions when exposed to light, thus improving the stability of the PSCs through a dual protection mechanism. Under light/dark conditions, by orchestrating the precise cleavage and subsequent reformation of <em>C-X (X = Br, I)</em> bonds, <em>X<sup>−</sup></em> ions can undergo repeated cycles to facilitate a dynamic, cyclic self-repair mechanism of iodine vacancy defects. The result revealed that photoelectric conversion efficiency (PCE) of p-Bromoaniline-modified PSCs increased from 13.46 % to 17.18 %. The unencapsulated PSCs maintained a steady-state output power of 83.7 % under AM 1.5 illumination for 40 days at room temperature and RH 60 %.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"9 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044219","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}
H bonds in PH3. The reaction mechanism was studied using first principles theory calculations. It is verified that there is a synergistic catalytic effect between Ni and Fe3O4, and Fe3O4 plays a major role in the photocatalysis, while the bonding orbitals of the Ni site having lower energies exhibit a better non-photocatalytic performance than Fe3O4. The catalytic decomposition mechanisms of PH3 on Fe3O4-Ni@HNTs-NH2 in photocatalytic and non-photocatalytic ways have been proposed. The halloysite nanotubes co-doped by Ni and Fe3O4 is an efficient and environment-friendly catalyst for both abatement and utilization of industrial waste PH3 gas.
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：