Vacuum ultraviolet (VUV) with a wavelength of 172 nm was employed to prepare amorphous Zn-doped TiO2 (ZTO) thin films using titanium tetraisopropoxide as a precursor to form TiO2 and zinc(II) dibutyldithiocarbamate as a Zn doping source. During the VUV irradiation on the precursor films, the incorporation of zinc and the departure of nitrogen and sulfur enhance the conductivity and electron mobility of the thin films. The prepared ZTO thin films were used as the electron transport layer to fabricate mesoporous perovskite solar cells (PSCs). The optimal doping molar ratio of zinc was determined to be 2 % according to the photoelectric performance of PSCs based on the ZTO thin films. The improved interfacial contact between the ZTO electron transport layer and the electrode substrate reduces the interfacial charge transfer resistance. The synergistic effect of ZTO electron transport layer enhances the power conversion efficiency (PCE) of PSCs from 18.28 % to 21.21 %. In addition, the ZTO thin film was used as the compact layer in quantum dot-sensitized solar cells, significantly improving their performance. Therefore, the VUV irradiation technique is a general method to prepare the doping metal oxide thin films for fabricating high efficiency solar cells with the compact thin film structure.
{"title":"Low-temperature preparation of high electrical conductivity amorphous compact Zn-doped TiO2 thin films via vacuum ultraviolet for high efficient solar cells","authors":"Jiao Men, Zhuo Dong, Yushan Li, Xiaoying Xie, Chenxi Zhang, Yanhong Qiao, Jingbo Zhang","doi":"10.1016/j.jssc.2025.125302","DOIUrl":"10.1016/j.jssc.2025.125302","url":null,"abstract":"<div><div>Vacuum ultraviolet (VUV) with a wavelength of 172 nm was employed to prepare amorphous Zn-doped TiO<sub>2</sub> (ZTO) thin films using titanium tetraisopropoxide as a precursor to form TiO<sub>2</sub> and zinc(II) dibutyldithiocarbamate as a Zn doping source. During the VUV irradiation on the precursor films, the incorporation of zinc and the departure of nitrogen and sulfur enhance the conductivity and electron mobility of the thin films. The prepared ZTO thin films were used as the electron transport layer to fabricate mesoporous perovskite solar cells (PSCs). The optimal doping molar ratio of zinc was determined to be 2 % according to the photoelectric performance of PSCs based on the ZTO thin films. The improved interfacial contact between the ZTO electron transport layer and the electrode substrate reduces the interfacial charge transfer resistance. The synergistic effect of ZTO electron transport layer enhances the power conversion efficiency (PCE) of PSCs from 18.28 % to 21.21 %. In addition, the ZTO thin film was used as the compact layer in quantum dot-sensitized solar cells, significantly improving their performance. Therefore, the VUV irradiation technique is a general method to prepare the doping metal oxide thin films for fabricating high efficiency solar cells with the compact thin film structure.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125302"},"PeriodicalIF":3.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-03DOI: 10.1016/j.jssc.2025.125301
Hongzhi Wang, Xiangcheng Shen, Weiguo Zhang, Suwei Yao
The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni0.85Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni0.85Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm−2 for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm−2 for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm−2 at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm−2 and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.
{"title":"Amorphous/Crystalline NiFeS@Ni0.85Se supported on nickel foam as bifunctional electrocatalysts for efficient water splitting","authors":"Hongzhi Wang, Xiangcheng Shen, Weiguo Zhang, Suwei Yao","doi":"10.1016/j.jssc.2025.125301","DOIUrl":"10.1016/j.jssc.2025.125301","url":null,"abstract":"<div><div>The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni<sub>0.85</sub>Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni<sub>0.85</sub>Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm<sup>−2</sup> for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm<sup>−2</sup> for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm<sup>−2</sup> at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm<sup>−2</sup> and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125301"},"PeriodicalIF":3.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-28DOI: 10.1016/j.jssc.2025.125298
D.A.B. Barbosa , A.S. de Menezes , C. Luz-Lima , T.M.B.F. Oliveira , C.C. Santos , J.V.B. Moura
Silver tungstate (Ag2WO4) is a multifunctional and polymorphic material, recognized for its metastable phases and a wide range of applications due to its highly desirable properties. The synthesis of its phases, along with the resulting structure and morphology, is highly sensitive to the synthesis method, processing conditions, and the presence of surfactants, allowing the surface properties to be optimized. Ag2WO4 polymorphism involves three distinct crystalline phases: alpha (orthorhombic), beta (hexagonal), and gamma (cubic), each exhibiting different micrometric-scale morphologies. Additionally, the beta and gamma phases are metastable and transform into the alpha phase with increasing temperature. In this investigation, we synthesized γ-Ag2WO4 crystals using a precipitation method at low temperatures. The resulting precipitate was washed with acetone and dried at 50 °C. We characterized the physical properties using Powder X-Ray Diffraction and Raman Spectroscopy across varying temperature ranges. The synthesized samples exhibited a dominant cubic phase with a minor beta phase (∼5 %) at room temperature. Powder X-Ray Diffraction and Raman Spectroscopy revealed three Ag2WO4 phases (alpha, beta, gamma) between 15 K and 530 K, with phase transitions occurring at 360 K, 420 K, and 480 K. The gamma phase predominated up to 340 K, while the alpha phase became dominant above 400 K, as the beta and gamma phases gradually disappeared, especially above 470 K. The γ→α phase transition can be classified as reconstructive.
{"title":"Phase evolution and lattice dynamics in Ag2WO4 from 15 K to 530 K: Insights from powder X-ray diffraction and Raman spectroscopy","authors":"D.A.B. Barbosa , A.S. de Menezes , C. Luz-Lima , T.M.B.F. Oliveira , C.C. Santos , J.V.B. Moura","doi":"10.1016/j.jssc.2025.125298","DOIUrl":"10.1016/j.jssc.2025.125298","url":null,"abstract":"<div><div>Silver tungstate (Ag<sub>2</sub>WO<sub>4</sub>) is a multifunctional and polymorphic material, recognized for its metastable phases and a wide range of applications due to its highly desirable properties. The synthesis of its phases, along with the resulting structure and morphology, is highly sensitive to the synthesis method, processing conditions, and the presence of surfactants, allowing the surface properties to be optimized. Ag<sub>2</sub>WO<sub>4</sub> polymorphism involves three distinct crystalline phases: alpha (orthorhombic), beta (hexagonal), and gamma (cubic), each exhibiting different micrometric-scale morphologies. Additionally, the beta and gamma phases are metastable and transform into the alpha phase with increasing temperature. In this investigation, we synthesized γ-Ag<sub>2</sub>WO<sub>4</sub> crystals using a precipitation method at low temperatures. The resulting precipitate was washed with acetone and dried at 50 °C. We characterized the physical properties using Powder X-Ray Diffraction and Raman Spectroscopy across varying temperature ranges. The synthesized samples exhibited a dominant cubic phase with a minor beta phase (∼5 %) at room temperature. Powder X-Ray Diffraction and Raman Spectroscopy revealed three Ag<sub>2</sub>WO<sub>4</sub> phases (alpha, beta, gamma) between 15 K and 530 K, with phase transitions occurring at 360 K, 420 K, and 480 K. The gamma phase predominated up to 340 K, while the alpha phase became dominant above 400 K, as the beta and gamma phases gradually disappeared, especially above 470 K. The γ→α phase transition can be classified as reconstructive.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125298"},"PeriodicalIF":3.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-28DOI: 10.1016/j.jssc.2025.125299
Yi Li, Kai Tuo, Weifeng Hou, Chuyao Liang, Cuicui Shao, Yuxin Sun, Wei Xu, Shuyang Cao, Yougan Wang, Shouzhi Pu, Zhijian Li
The abundant uranium resources in the ocean hold significant importance for alleviating the shortage of uranium resources and promoting economic and environmental protection. Hence, a novel oxime functionalized adsorbent (UiO-66-oxime) was prepared through solvothermal method. Acetic acid (AA) was also introduced as a regulator in the preparation of UiO-66-oxime, and the regulatory effect of AA on the morphology and crystal shape of UiO-66-oxime was investigated. In addition, by using the one-step post-synthetic methods (PSMs), the conversion efficiency of the functional groups is improved, the structural degradation of UiO-66-oxime during the continuous modification process is reduced and the morphological stability is greatly maintained. The adsorption process of UiO-66-oxime is highly consistent with the Langmuir isotherm adsorption model and the pseudo-second order model. Impressively, UiO-66-oxime has a huge adsorption capacity (qm = 446.40 mg g−1) and reaching the adsorption equilibrium within 30 min (C0 = 20 mg L−1), making it a promising material for uranium extraction. Overall, this work opens up new possibilities for construction of an oxime group modified metal-organic framework (MOF) adsorbent.
{"title":"Oxime-functionalized metal-organic framework for efficient removal of uranium from seawater","authors":"Yi Li, Kai Tuo, Weifeng Hou, Chuyao Liang, Cuicui Shao, Yuxin Sun, Wei Xu, Shuyang Cao, Yougan Wang, Shouzhi Pu, Zhijian Li","doi":"10.1016/j.jssc.2025.125299","DOIUrl":"10.1016/j.jssc.2025.125299","url":null,"abstract":"<div><div>The abundant uranium resources in the ocean hold significant importance for alleviating the shortage of uranium resources and promoting economic and environmental protection. Hence, a novel oxime functionalized adsorbent (UiO-66-oxime) was prepared through solvothermal method. Acetic acid (AA) was also introduced as a regulator in the preparation of UiO-66-oxime, and the regulatory effect of AA on the morphology and crystal shape of UiO-66-oxime was investigated. In addition, by using the one-step post-synthetic methods (PSMs), the conversion efficiency of the functional groups is improved, the structural degradation of UiO-66-oxime during the continuous modification process is reduced and the morphological stability is greatly maintained. The adsorption process of UiO-66-oxime is highly consistent with the Langmuir isotherm adsorption model and the pseudo-second order model. Impressively, UiO-66-oxime has a huge adsorption capacity (q<sub>m</sub> = 446.40 mg g<sup>−1</sup>) and reaching the adsorption equilibrium within 30 min (C<sub>0</sub> = 20 mg L<sup>−1</sup>), making it a promising material for uranium extraction. Overall, this work opens up new possibilities for construction of an oxime group modified metal-organic framework (MOF) adsorbent.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"346 ","pages":"Article 125299"},"PeriodicalIF":3.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-28DOI: 10.1016/j.jssc.2025.125297
Wilarachchige D.C.B. Gunatilleke , Oluwagbemiga P. Ojo , Adam J. Biacchi , George S. Nolas
Thermal properties are inherent in all crystalline materials, and an understanding of thermal properties is integral to any application of interest. Furthermore, low thermal conductivity, κ, materials continue to be of great importance from both a fundamental scientific viewpoint as well as for technologically significant applications. Herein we report on the structural and thermal properties, as well as the optical properties, of the relatively unexplored quaternary chalcogenide Na2MgSnS4. The crystal structure, which can be thought of as being derived from cation substitution from the ternary chalcogenide NaCrS2, was investigated via Rietveld refinement, and Raman spectroscopy revealed the Raman-active modes for this quaternary chalcogenide. Analyses and modelling of the temperature-dependent thermal properties revealed relatively large lattice anharmonicity and low average speed of sound resulting in intrinsically low κ. In light of the current interest in layered multinary chalcogenides, our results can be employed in the development of this and similar layered quaternary chalcogenides for applications of interest.
{"title":"Structural, optical and thermal properties of Na2MgSnS4","authors":"Wilarachchige D.C.B. Gunatilleke , Oluwagbemiga P. Ojo , Adam J. Biacchi , George S. Nolas","doi":"10.1016/j.jssc.2025.125297","DOIUrl":"10.1016/j.jssc.2025.125297","url":null,"abstract":"<div><div>Thermal properties are inherent in all crystalline materials, and an understanding of thermal properties is integral to any application of interest. Furthermore, low thermal conductivity, <em>κ</em>, materials continue to be of great importance from both a fundamental scientific viewpoint as well as for technologically significant applications. Herein we report on the structural and thermal properties, as well as the optical properties, of the relatively unexplored quaternary chalcogenide Na<sub>2</sub>MgSnS<sub>4</sub>. The crystal structure, which can be thought of as being derived from cation substitution from the ternary chalcogenide NaCrS<sub>2</sub>, was investigated via Rietveld refinement, and Raman spectroscopy revealed the Raman-active modes for this quaternary chalcogenide. Analyses and modelling of the temperature-dependent thermal properties revealed relatively large lattice anharmonicity and low average speed of sound resulting in intrinsically low <em>κ</em>. In light of the current interest in layered multinary chalcogenides, our results can be employed in the development of this and similar layered quaternary chalcogenides for applications of interest.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125297"},"PeriodicalIF":3.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-28DOI: 10.1016/j.jssc.2025.125290
Tianyi Zhou , Xingfang Yu , Yuanfang Li , Yuanping Jiang , Zuojia Li , Yingcai Wang , Yayu Dong , Zhibin Zhang , Yunhai Liu
A critical aspect of the design of photocatalytic materials is the prevention of recombination of photogenerated carriers to maximize the photocatalytic efficiency for the removal of U(VI). Herein, the sulfur successfully integrated into co-precipitated zinc ferrate nanoparticles (ZFO) and nitrogen-doped zinc ferrate nanoparticles (N-ZFO) through a hydrothermal method, which exhibit exceptional photocatalytic activity under various lighting conditions. Compared to conventional ZFO, the bandgap energy of sulfur-doped ZFO was found to be narrower, and the charge carrier separation and transfer rates were higher, which are beneficial for the reduction of U(VI) by photoelectrons. Among these, the co-precipitated ZnFe2O4 demonstrated a U(VI) reduction efficiency that was four times that of N-ZFO, and the reduction effect of S6-ZFO on U(VI) was 1.21 times and 1.08 times that of ZFO and S15–N-ZFO, respectively. The photocatalytic activity of S6-ZFO under natural light conditions exhibits diverse behaviors: 418.49 μmol/(g·h) on sunny days, 198.95 μmol/(g·h) on cloudy days, and 40.55 μmol/(g·h) on rainy days. Remarkably, it retains good photocatalytic activity even under a light intensity of 1000 Lux, offering a valuable strategy for the development of high-performance low-light photocatalysts. This breakthrough work offers a unique interfacial engineering approach capable of enhancing the removal of U(VI).
{"title":"Boosting photocatalytic reduction of uranium by sulfur-doped zinc ferrate nanoparticles: Impacts of shallow energy levels and light intensity","authors":"Tianyi Zhou , Xingfang Yu , Yuanfang Li , Yuanping Jiang , Zuojia Li , Yingcai Wang , Yayu Dong , Zhibin Zhang , Yunhai Liu","doi":"10.1016/j.jssc.2025.125290","DOIUrl":"10.1016/j.jssc.2025.125290","url":null,"abstract":"<div><div>A critical aspect of the design of photocatalytic materials is the prevention of recombination of photogenerated carriers to maximize the photocatalytic efficiency for the removal of U(VI). Herein, the sulfur successfully integrated into co-precipitated zinc ferrate nanoparticles (ZFO) and nitrogen-doped zinc ferrate nanoparticles (N-ZFO) through a hydrothermal method, which exhibit exceptional photocatalytic activity under various lighting conditions. Compared to conventional ZFO, the bandgap energy of sulfur-doped ZFO was found to be narrower, and the charge carrier separation and transfer rates were higher, which are beneficial for the reduction of U(VI) by photoelectrons. Among these, the co-precipitated ZnFe<sub>2</sub>O<sub>4</sub> demonstrated a U(VI) reduction efficiency that was four times that of N-ZFO, and the reduction effect of S<sub>6</sub>-ZFO on U(VI) was 1.21 times and 1.08 times that of ZFO and S<sub>15</sub>–N-ZFO, respectively. The photocatalytic activity of S<sub>6</sub>-ZFO under natural light conditions exhibits diverse behaviors: 418.49 μmol/(g·h) on sunny days, 198.95 μmol/(g·h) on cloudy days, and 40.55 μmol/(g·h) on rainy days. Remarkably, it retains good photocatalytic activity even under a light intensity of 1000 Lux, offering a valuable strategy for the development of high-performance low-light photocatalysts. This breakthrough work offers a unique interfacial engineering approach capable of enhancing the removal of U(VI).</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125290"},"PeriodicalIF":3.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The demand for a high-quality indoor environment where individuals spend most of their time is rapidly increasing in line with promoting life-quality standards. Indoor air pollution primarily originates from chemical gases emitted by various building materials and home goods, as well as pathogenic microbial aerosols emitted from garbage and ventilation equipment. Both adsorption and catalysis methods are extensively employed to purify indoor air pollutants. As a typical porous material, mesoporous molecular sieves have attracted significant attention as adsorbents or catalyst carriers for pollutant adsorption and degradation due to their large specific surface area, tunable pore structure, and ease of surface modification. This communication discusses the development of mesoporous molecular sieve-based adsorbents, catalysts, and antibacterial materials for indoor pollutant removal. It provides a detailed overview of the selection and optimization of various mesoporous molecular sieves, including pore structure regulation and surface modification, to enhance their effectiveness as air purification materials (adsorbents/catalysts/antibacterial agents). Furthermore, by analyzing and summarizing the current research progress and existing challenges in this field, this review aims to provide valuable insights for researchers in related areas.
{"title":"Mesoporous molecular sieves for indoor air purification: Adsorption and catalysis","authors":"Fengshi Meng , Zelong Shen , Wei Gao , Xiaotong Yang , Honghong Yi , Shunzheng Zhao , Xiaolong Tang , Qingjun Yu","doi":"10.1016/j.jssc.2025.125300","DOIUrl":"10.1016/j.jssc.2025.125300","url":null,"abstract":"<div><div>The demand for a high-quality indoor environment where individuals spend most of their time is rapidly increasing in line with promoting life-quality standards. Indoor air pollution primarily originates from chemical gases emitted by various building materials and home goods, as well as pathogenic microbial aerosols emitted from garbage and ventilation equipment. Both adsorption and catalysis methods are extensively employed to purify indoor air pollutants. As a typical porous material, mesoporous molecular sieves have attracted significant attention as adsorbents or catalyst carriers for pollutant adsorption and degradation due to their large specific surface area, tunable pore structure, and ease of surface modification. This communication discusses the development of mesoporous molecular sieve-based adsorbents, catalysts, and antibacterial materials for indoor pollutant removal. It provides a detailed overview of the selection and optimization of various mesoporous molecular sieves, including pore structure regulation and surface modification, to enhance their effectiveness as air purification materials (adsorbents/catalysts/antibacterial agents). Furthermore, by analyzing and summarizing the current research progress and existing challenges in this field, this review aims to provide valuable insights for researchers in related areas.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125300"},"PeriodicalIF":3.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-27DOI: 10.1016/j.jssc.2025.125294
Yuzhong Mao , Jianzhang Zhu , Hui Li , Fei Zha , Shizi Ma , Haifeng Tian , Yue Chang
K-doped ZSM-5 zeolites (K-ZSM-5) were prepared by equal volume impregnation, ion exchange and in situ isomerization methods. Equal volume impregnation can effectively increase the specific surface area of zeolite, regulate the proper balance of weak and strong acid centers, and introduce more K into the ZSM-5 zeolite skeleton. K–O interaction produces a suitable pore structure, which provides more active centers and reduces carbon deposition. K-ZSM-5 prepared by equal volume impregnation showed good catalytic activity in methanol coupled with butene to propylene when the amount of potassium was 1.45 wt %. Under the temperature of 550 °C, pressure of 0.4 MPa, methanol/butene (molar ratio) of 1/1 and WHSV of 1800 mL/(gcat·h), Operating at temperature of 550 °C, pressure of 0.4 MPa, molar ratio of methanol to butene of 1:1, and WHSV of 1800 mL/(gcat·h), the butene conversion was 74.9 %, accompanied by a propylene selectivity of 42.2 % and STY of 20.8 mol/(gcat·h). Density Functional Theory (DFT) calculations showed that doping K to ZSM-5 can make –OH of methanolate of higher electronegativity, further strengthen the interaction between oxygen and the catalyst surface, stabilize the adsorption of butene on the catalyst, and facilitate coupled methanol with butene to generate light olefins.
{"title":"Potassium-modified ZSM-5 zeolite for catalytic coupling methanol with butene to propylene","authors":"Yuzhong Mao , Jianzhang Zhu , Hui Li , Fei Zha , Shizi Ma , Haifeng Tian , Yue Chang","doi":"10.1016/j.jssc.2025.125294","DOIUrl":"10.1016/j.jssc.2025.125294","url":null,"abstract":"<div><div>K-doped ZSM-5 zeolites (K-ZSM-5) were prepared by equal volume impregnation, ion exchange and in situ isomerization methods. Equal volume impregnation can effectively increase the specific surface area of zeolite, regulate the proper balance of weak and strong acid centers, and introduce more K into the ZSM-5 zeolite skeleton. K–O interaction produces a suitable pore structure, which provides more active centers and reduces carbon deposition. K-ZSM-5 prepared by equal volume impregnation showed good catalytic activity in methanol coupled with butene to propylene when the amount of potassium was 1.45 wt %. Under the temperature of 550 °C, pressure of 0.4 MPa, methanol/butene (molar ratio) of 1/1 and WHSV of 1800 mL/(g<sub>cat</sub>·h), Operating at temperature of 550 °C, pressure of 0.4 MPa, molar ratio of methanol to butene of 1:1, and WHSV of 1800 mL/(g<sub>cat</sub>·h), the butene conversion was 74.9 %, accompanied by a propylene selectivity of 42.2 % and STY of 20.8 mol/(g<sub>cat</sub>·h). Density Functional Theory (DFT) calculations showed that doping K to ZSM-5 can make –OH of methanolate of higher electronegativity, further strengthen the interaction between oxygen and the catalyst surface, stabilize the adsorption of butene on the catalyst, and facilitate coupled methanol with butene to generate light olefins.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"346 ","pages":"Article 125294"},"PeriodicalIF":3.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-27DOI: 10.1016/j.jssc.2025.125289
Mohamed E. Mahmoud , Rehab M. El-Sharkawy , Elhassan A. Allam , Gehan M. Nabil , Febee R. Louka , Mika Sillanpää , Sarah M. Elsayed
Inorganic pollutants as heavy metal cations, radioactive nuclides and major anionic contaminants are highly toxic, nonbiodegradable and accumulative when released to the aquatic systems and therefore, causing a worldwide environmental pollution problem. Recent research interests have been mainly intensified and devoted to find out regenerable, low-cost and eco-friendly environmental materials with targeted and incorporated characteristics for sequestration and removal of theses inorganic pollutants from wastewater and aquatic systems. Layered double hydroxides (LDHs) are classified as low-cost materials due to their preparation and formation of some simple metal salts as widely available and low-cost constituents. Therefore, LDHs and their composites of clays, polymers, nanometal oxides, and different organic derivatives have attracted pronounced focuses in recent years owing to their wide range of applications. One of the most important applications of LDHs is related to water remediation from various contaminants, including organics, pesticides, heavy metals, and radioactive nuclides. The characteristics of these materials as anionic clays are based on the positive charge layers via interlayer guest anions, in addition to their high specific surface area for excellent adsorption efficiency via ion exchange mechanisms. In this review article, the recent applications of LDHs materials were reviewed and surveyed in adsorptive removal of various toxic heavy metal pollutants. These include monovalent metals such as Ag, divalent metals like Cu, Pb, Hg, Cd, Co, Zn, Ni, and Mn, besides other metal species including removal of As(III, VI), Cr(VI), Mo(III), V(V). In addition, removal of these ions was classified into single, bi-, tri-, and multi-toxic heavy metal cations as well as single, bi-, tri-, and multi-toxic anions. Moreover, radioactive nuclides as pollutants of major concern were also surveyed and covered in this review. Removal processes of these toxic metals have been classified in diverse categories as the well-known synthetic approaches to prepare LDHs and their composites are also discussed.
{"title":"Layered double hydroxide nanocomposites as promising nanomaterials for removal of inorganic pollutants from aquatic systems: A review","authors":"Mohamed E. Mahmoud , Rehab M. El-Sharkawy , Elhassan A. Allam , Gehan M. Nabil , Febee R. Louka , Mika Sillanpää , Sarah M. Elsayed","doi":"10.1016/j.jssc.2025.125289","DOIUrl":"10.1016/j.jssc.2025.125289","url":null,"abstract":"<div><div>Inorganic pollutants as heavy metal cations, radioactive nuclides and major anionic contaminants are highly toxic, nonbiodegradable and accumulative when released to the aquatic systems and therefore, causing a worldwide environmental pollution problem. Recent research interests have been mainly intensified and devoted to find out regenerable, low-cost and eco-friendly environmental materials with targeted and incorporated characteristics for sequestration and removal of theses inorganic pollutants from wastewater and aquatic systems. Layered double hydroxides (LDHs) are classified as low-cost materials due to their preparation and formation of some simple metal salts as widely available and low-cost constituents. Therefore, LDHs and their composites of clays, polymers, nanometal oxides, and different organic derivatives have attracted pronounced focuses in recent years owing to their wide range of applications. One of the most important applications of LDHs is related to water remediation from various contaminants, including organics, pesticides, heavy metals, and radioactive nuclides. The characteristics of these materials as anionic clays are based on the positive charge layers via interlayer guest anions, in addition to their high specific surface area for excellent adsorption efficiency via ion exchange mechanisms. In this review article, the recent applications of LDHs materials were reviewed and surveyed in adsorptive removal of various toxic heavy metal pollutants. These include monovalent metals such as Ag, divalent metals like Cu, Pb, Hg, Cd, Co, Zn, Ni, and Mn, besides other metal species including removal of As(III, VI), Cr(VI), Mo(III), V(V). In addition, removal of these ions was classified into single, bi-, tri-, and multi-toxic heavy metal cations as well as single, bi-, tri-, and multi-toxic anions. Moreover, radioactive nuclides as pollutants of major concern were also surveyed and covered in this review. Removal processes of these toxic metals have been classified in diverse categories as the well-known synthetic approaches to prepare LDHs and their composites are also discussed.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"346 ","pages":"Article 125289"},"PeriodicalIF":3.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-27DOI: 10.1016/j.jssc.2025.125295
Yuge Chang , Xiaoyan Gan , Jianhua Liao , Longtao Du , Liling Guo , Zhang wen , Hanxing Liu
In recent years, due to the toxicity and instability of halide lead-based perovskites, the search for alternatives that retain the superior optoelectronic performance of halide lead-based perovskite materials while being non-toxic and stable has gradually become an important research topic. Among them, the lead-free perovskites with the general formula A4MIIMIII2X12 are very promising in solving the problem of lead ion toxicity. Here, we have studied the Cs4CuSb2Cl12 perovskite material, which is a three-layer (n = 3) perovskite structure oriented along <111>. In this paper, a series of Cs4Cu1-xCdxSb2Cl12 (0 ≤ x ≤ 1) and Cs4Cu1-yMnySb2Cl12 (0 ≤ y ≤ 1) microcrystals were synthesized. By varying the value of x and y, we successfully tuned the bandgap and optical properties of Cs4CuSb2Cl12. This allowed us to establish a clear correlation between the material's composition, structure, and properties, laying the foundation for further research and application of Cs4CuSb2Cl12 materials.
{"title":"Adjustment of the composition, structure, and properties of a lead-free layered double perovskite","authors":"Yuge Chang , Xiaoyan Gan , Jianhua Liao , Longtao Du , Liling Guo , Zhang wen , Hanxing Liu","doi":"10.1016/j.jssc.2025.125295","DOIUrl":"10.1016/j.jssc.2025.125295","url":null,"abstract":"<div><div>In recent years, due to the toxicity and instability of halide lead-based perovskites, the search for alternatives that retain the superior optoelectronic performance of halide lead-based perovskite materials while being non-toxic and stable has gradually become an important research topic. Among them, the lead-free perovskites with the general formula A<sub>4</sub>M<sup>II</sup>M<sup>III</sup><sub>2</sub>X<sub>12</sub> are very promising in solving the problem of lead ion toxicity. Here, we have studied the Cs<sub>4</sub>CuSb<sub>2</sub>Cl<sub>12</sub> perovskite material, which is a three-layer (n = 3) perovskite structure oriented along <111>. In this paper, a series of Cs<sub>4</sub>Cu<sub>1-x</sub>Cd<sub>x</sub>Sb<sub>2</sub>Cl<sub>12</sub> (0 ≤ x ≤ 1) and Cs<sub>4</sub>Cu<sub>1-y</sub>Mn<sub>y</sub>Sb<sub>2</sub>Cl<sub>12</sub> (0 ≤ y ≤ 1) microcrystals were synthesized. By varying the value of x and y, we successfully tuned the bandgap and optical properties of Cs<sub>4</sub>CuSb<sub>2</sub>Cl<sub>12</sub>. This allowed us to establish a clear correlation between the material's composition, structure, and properties, laying the foundation for further research and application of Cs<sub>4</sub>CuSb<sub>2</sub>Cl<sub>12</sub> materials.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125295"},"PeriodicalIF":3.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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