Solid State Sciences最新文献_第2页

Influence of crystalline phase structure of rare earth oxides on active oxygen and basic sites 稀土氧化物晶相结构对活性氧和碱性位点的影响

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-11-01 DOI: 10.1016/j.solidstatesciences.2024.107738

Jianping Fu , Xuefang Wen , Zhiyong Xu, Yongsheng Guo, Chunshan Ke, Junwei Xu

{"title":"Influence of crystalline phase structure of rare earth oxides on active oxygen and basic sites","authors":"Jianping Fu , Xuefang Wen , Zhiyong Xu, Yongsheng Guo, Chunshan Ke, Junwei Xu","doi":"10.1016/j.solidstatesciences.2024.107738","DOIUrl":"10.1016/j.solidstatesciences.2024.107738","url":null,"abstract":"<div><div>Herein, the effects of crystalline phase structures of rare earth oxides on active oxygen and basic sites were investigated. The fluorite structure shows the best lattice oxygen mobility and redox properties due to its open structure and weakest Ln-O bond strength. For Pr6O11 and Tb4O7, the presence of polyvalent cation states further enhances these properties. Based on the basicity and number of basic sites, the surfaces of A-type, B-type, and C-type lanthanide sesquioxides facilitate the generation of chemisorbed oxygen species in the following order: A-type > B-type > C-type. Furthermore, the basicity and amount of chemisorbed oxygen species are dependent on the electronegativity of rare earth elements, which decreases gradually from La to Lu. This is because from La2O3 to Lu2O3, electrons are less biased toward oxygen, the basicity of lattice oxygen decreases, and fewer electrons are produced for gaseous oxygen activation and chemisorbed oxygen generation.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"158 ","pages":"Article 107738"},"PeriodicalIF":3.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572415","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}

引用次数: 0

Crystal structures of the R1.33Ni3Ga8 (R = Tb, Ho, Er, Tm, Lu) compounds R1.33Ni3Ga8 （R = Tb、Ho、Er、Tm、Lu）化合物的晶体结构

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-31 DOI: 10.1016/j.solidstatesciences.2024.107737

Nataliya Muts, Yaroslav Tokaychuk, Roman Gladyshevskii

{"title":"Crystal structures of the R1.33Ni3Ga8 (R = Tb, Ho, Er, Tm, Lu) compounds","authors":"Nataliya Muts, Yaroslav Tokaychuk, Roman Gladyshevskii","doi":"10.1016/j.solidstatesciences.2024.107737","DOIUrl":"10.1016/j.solidstatesciences.2024.107737","url":null,"abstract":"<div><div>The existence of five new ternary compounds with Gd1.33Pt3Al8-type structure (Pearson symbol hR51, space group R-3m) was established by means of X-ray powder diffraction and energy-dispersive X-ray spectroscopy: Tb1.33Ni3Ga8 (а = 4.2056(1), с = 37.8913(9) Å), Ho1.33Ni3Ga8 (а = 4.19666(9), с = 37.7882(9) Å), Er1.33Ni3Ga8 (a = 4.19290(8), c = 37.7446(8) Å), Tm1.33Ni3Ga8 (a = 4.18819(7), c = 37.6980(7) Å), and Lu1.33Ni3Ga8 (a = 4.1826(1), c = 37.647(1) Å). The structures of the ternary R1.33Ni3Ga8 compounds belong to a family of linear-intergrowth structures with the general formula R0.67TnM2n + m and are built from atom layers of the composition R0.67Ga (R0.67M), separated by single or double NiGa2 slabs (TM2). The layers containing the rare-earth metal atoms are characterized by a disordered distribution of rare-earth metal atoms and Ga-atom triangles.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"158 ","pages":"Article 107737"},"PeriodicalIF":3.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572434","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}

引用次数: 0

Syntheses and some properties of solid solution Yb(Al,T)B4 (T = Mo or W) compounds 固溶体 Yb（Al，T）B4（T = Mo 或 W）化合物的合成及其某些特性

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-30 DOI: 10.1016/j.solidstatesciences.2024.107735

Kaoru Kouzu , Shigeru Okada , Takeshi Hagiwara , Akiko Nomura , Kunio Yubuta , Takao Mori , Toetsu Shishido , Akira Yoshikawa

{"title":"Syntheses and some properties of solid solution Yb(Al,T)B4 (T = Mo or W) compounds","authors":"Kaoru Kouzu , Shigeru Okada , Takeshi Hagiwara , Akiko Nomura , Kunio Yubuta , Takao Mori , Toetsu Shishido , Akira Yoshikawa","doi":"10.1016/j.solidstatesciences.2024.107735","DOIUrl":"10.1016/j.solidstatesciences.2024.107735","url":null,"abstract":"<div><div>RAlB4 (R = rare earth element) has attracted increasing attention due to recent reports on its properties in magnetic, thermoelectric and superconducting materials. The authors developed and we investigated the formation of the solid solution Yb(Al0.995T0.005)B4 (T = Cr, Mn or Fe) compounds in which the Al position of YbAlB4 is substituted with T atoms using the Al flux method. In this study, crystals of the boride Yb(Al0.995T0.005)B4 (T = Mo or W) were grown by using Al flux mixed with T metal at 1773 K for 5h. Yb(Al0.995W0.005)B4 was obtained as the single phase, however, in the case of Yb(Al0.995Mo0.005)B4, a small amount of AlMoB crystals was contained. The crystals were measured using a micro-Vickers hardness tester, and the oxidation resistance was examined in air using DTA-TG apparatus. Comparing the lattice constants and chemical composition of YbAlB4 and Yb(Al0.995T0.005)B4, it were understood that the lattice constant of Yb(Al,T)B4 were larger than that of YbAlB4 crystals. Yb(Al,T)B4 were grown as a solid solution contained about 40 % of each T metal. The hardness values were 11.0(±0.7) GPa for Yb(Al0.995Mo0.005)B4 and 15.7(±1.9) GPa for Yb(Al0.995W0.005)B4. The oxidation of Yb(Al,T)B4 starts in the range of 971–987 K. The oxidation onset temperature during the heating of Yb(Al,T)B4 is about 100 K higher than YbAlB4.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"158 ","pages":"Article 107735"},"PeriodicalIF":3.4,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662228","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}

引用次数: 0

Synthesis of europium-based crystals containing As or P by a flux method: Attempts to grow EuAgP single crystals 用通量法合成含 As 或 P 的铕基晶体：生长 EuAgP 单晶体的尝试

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-30 DOI: 10.1016/j.solidstatesciences.2024.107736

Karolina Podgórska , Damian Rybicki , Lan Maria Tran , Wojciech Tabiś , Łukasz Gondek , Michał Babij

引用次数: 0

Unexpectedly high degradation efficiency for MB on Bi3O4Br photocatalyst obtained from bismuth citrate 从柠檬酸铋中提取的 Bi3O4Br 光催化剂对甲基溴的降解效率出乎意料地高

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-30 DOI: 10.1016/j.solidstatesciences.2024.107734

Zhihao Wang , Huiwei Ding , Qiaofeng Han

{"title":"Unexpectedly high degradation efficiency for MB on Bi3O4Br photocatalyst obtained from bismuth citrate","authors":"Zhihao Wang , Huiwei Ding , Qiaofeng Han","doi":"10.1016/j.solidstatesciences.2024.107734","DOIUrl":"10.1016/j.solidstatesciences.2024.107734","url":null,"abstract":"<div><div>For the first time, pure Bi3O4Br with a uniform square sheet-like structure was synthesized using a hydrothermal method at 180 °C and pH of 12.5 by employing bismuth citrate as the bismuth source without any surfactant. The photocatalytic activity of Bi3O4Br for the degradation of methylene blue (MB), tetracycline (TC), methyl violet (MV), and rhodamine B (RhB) was evaluated under visible light illumination and the results showed that the as-prepared Bi3O4Br exhibited excellent photodegradation efficiency for MB with an apparent rate constant (ka) of 0.02676 min−1, superior to TC, MV and RhB with ka = 0.00899 min−1, 0.00073 min−1 and 0.00409 min−1, respectively. Since the direct oxidation of the holes predominates in the degradation process, the study on the photocatalytic mechanism suggested that a more positive valence band (VB) potential of Bi3O4Br than HOMO orbital position of MB was prerequisite and also, the smaller the difference between VB potential of a photocatalyst and HOMO energy level of a pollutant, the faster the migration of the holes and subsequent oxidation of pollutant.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"158 ","pages":"Article 107734"},"PeriodicalIF":3.4,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552300","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}

引用次数: 0

Intrinsic spin currents in bulk noncentrosymmetric ferromagnets 块状非五次对称铁磁体中的本征自旋电流

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-29 DOI: 10.1016/j.solidstatesciences.2024.107727

I. Turek

引用次数: 0

Formation and characterization of Mn-Bi-Al ternary alloys of enhanced magnetic performance in MnBi/Al composites 锰-铋-铝复合材料中磁性能增强的锰-铋-铝三元合金的形成与表征

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-24 DOI: 10.1016/j.solidstatesciences.2024.107730

Thanit Saisopa , Wutthigrai Sailuam , Puttamawan Juntree , Hideki Nakajima , Ratchadaporn Supruangnet , Denis Céolin , Supree Pinitsoontorn , Chitnarong Sirisathitkul , Prayoon Songsiriritthigul , Narasak Pandech , Tanachat Eknapakul

{"title":"Formation and characterization of Mn-Bi-Al ternary alloys of enhanced magnetic performance in MnBi/Al composites","authors":"Thanit Saisopa , Wutthigrai Sailuam , Puttamawan Juntree , Hideki Nakajima , Ratchadaporn Supruangnet , Denis Céolin , Supree Pinitsoontorn , Chitnarong Sirisathitkul , Prayoon Songsiriritthigul , Narasak Pandech , Tanachat Eknapakul","doi":"10.1016/j.solidstatesciences.2024.107730","DOIUrl":"10.1016/j.solidstatesciences.2024.107730","url":null,"abstract":"<div><div>Low-temperature phase manganese bismuth (LTP-MnBi) and a series of aluminum (Al) composites were synthesized using a potentially facile and scalable low-temperature liquid-phase sintering method in a vacuum at 300 °C. The incorporation of up to 10 at% Al led to a significant enhancement in coercivity (Hc), increasing from 2.32 ± 0.04 to 4.15 ± 0.07 kOe, while saturation magnetization showed a slight decrease of less than 3 %. However, beyond this concentration, a dramatic reduction in Hc was observed. The density of the freshly compacted powders, which included up to 10 at% Al, remained relatively constant at 7.47–7.58 g/cm³ but decreased with excess Al. A maximum energy product (BH)max of 1 MGOe was achieved in the fresh sample, with a 16 % enhancement in (BH)max in the MnBi composite containing 5 at% Al. Scanning electron microscopy revealed distinct MnBi and Bi-rich regions, while Al-rich areas became prominent at Al concentrations above 10 at%. Energy dispersive spectroscopy confirmed that only 3–5 at% Al could be effectively incorporated into Mn-Bi regions, with excess Al unevenly distributed on the surface. X-ray photoelectron spectroscopy indicated the formation of Al, Al₂O₃, and potential Mn-Bi-Al ternary alloys. Additionally, slab-DFT models, such as AlMn/MnBi, indicate that Al inclusion enhances the magnetization in MnBi composites, providing insights into its effects on the magnetic properties of Mn-Bi systems. These findings offer promising strategies to address the challenges posed by excess Bi in the MnBi structure, potentially optimizing the magnetic performance of similar non-magnetic or soft-magnetic composite systems.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107730"},"PeriodicalIF":3.4,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527504","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}

引用次数: 0

Large coercivity and enhanced magnetization in La-substituted Sm6Mn23 alloys La 取代 Sm6Mn23 合金中的大矫顽力和增强磁性

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-23 DOI: 10.1016/j.solidstatesciences.2024.107732

Hai-Feng Nie , Ying-Hua Liang , Jihoon Park , Tian-Hong Zhou , Bao-Chao Zhang , Ping-Zhan Si , Xing Zheng , Youngwoon Song , Chul-Jin Choi , Qiong Wu

{"title":"Large coercivity and enhanced magnetization in La-substituted Sm6Mn23 alloys","authors":"Hai-Feng Nie , Ying-Hua Liang , Jihoon Park , Tian-Hong Zhou , Bao-Chao Zhang , Ping-Zhan Si , Xing Zheng , Youngwoon Song , Chul-Jin Choi , Qiong Wu","doi":"10.1016/j.solidstatesciences.2024.107732","DOIUrl":"10.1016/j.solidstatesciences.2024.107732","url":null,"abstract":"<div><div>The magnetic properties of Sm6Mn23-based alloys are still not fully understood for their high complexity in magnetic and crystallographic structures. This work presents studies of the structure and magnetic properties of Sm6Mn23 and Sm5LaMn23 alloys. The results show that both the binary and La-substituted ternary alloys crystallize in a cubic Th6Mn23 type structure (Fm-3m) with trace amount of Mn impurities. The lattice parameter of Sm5LaMn23 is slightly larger than that of Sm6Mn23. The Curie temperature of Sm5LaMn23 is ∼403 K, which is lower than that of Sm6Mn23. A field-dependent magnetic transition was observed in Sm5LaMn23, which shows a decreasing temperature at which Sm5LaMn23 exhibiting maximal magnetization with increasing field, indicating a suppression of the antiferromagnetic coupling of the rare earth and Mn moments under applied field. Large coercivities up to 0.74 T and 1.2 T are observed in Sm5LaMn23 bulk alloys and powders, respectively. The saturate magnetization, the remanent magnetization, and the coercivity of Sm5LaMn23 at 5 K are much higher than that of Sm6Mn23. The ball-milled Sm5LaMn23 powders exhibit significantly enhanced coercivity and magnetization. The refinement of the grain size during ball-milling results in the enhanced coercivity. The magnetic purification of the powders and possible local ferromagnetic configuration of the surface Mn atoms may result in the enhanced magnetization.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107732"},"PeriodicalIF":3.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527771","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}

引用次数: 0

Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure 具有立方反超晶型结构的固溶体 La1-xRxRh3B（R = Gd、Lu 和 Sc）化合物的相稳定性

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-23 DOI: 10.1016/j.solidstatesciences.2024.107731

Kunio Yubuta , Akiko Nomura , Kaoru Kouzu , Takao Mori , Shigeru Okada , Toetsu Shishido

{"title":"Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure","authors":"Kunio Yubuta , Akiko Nomura , Kaoru Kouzu , Takao Mori , Shigeru Okada , Toetsu Shishido","doi":"10.1016/j.solidstatesciences.2024.107731","DOIUrl":"10.1016/j.solidstatesciences.2024.107731","url":null,"abstract":"<div><div>We have investigated the solid solution range of single phase La1-xRxRh3B (R = Gd, Lu and Sc) compounds with a cubic anti-perovskite type structure. The behaviors of lattice parameters, hardness, and thermogravimetry–differential thermal analysis (TG-DTA) were also investigated. The cubic anti-perovskite phase exists over the entire composition range x from 0.0 to 1.0 for all La-Gd, La-Lu and La-Sc systems. Both the lattice parameters and the hardness in all La-Gd, La-Lu and La-Sc systems show a linear dependence on the degree of the substitution x of La atom. The results of TG-DTA measurements indicate that oxidation of the compounds in air begins at about 500–600 K. The mixed phases of RBO3, R2O3 and Rh are identified as oxidized products around x = 0.4 to 0.6 composition. The oxidation onset temperature, and weight gains due to the oxidation depend on the degree of substitution x. The behavior of crystallographic and physical/chemical properties in the present compounds La1-xRxRh3B strongly depend on the atomic size of the rare-earth atoms that form the cubic framework.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"158 ","pages":"Article 107731"},"PeriodicalIF":3.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552195","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}

引用次数: 0

Achieving enhanced power factor using dual substitution at Cu and S sites in tetrahedrites thermoelectric materials Cu12Sb4S13 利用四面体热电材料 Cu12Sb4S13 中 Cu 和 S 位点的双重置换来提高功率因数

IF 3.4 3区化学

Solid State Sciences Pub Date : 2024-10-23 DOI: 10.1016/j.solidstatesciences.2024.107729

Abhigyan Ojha, Sivaiah Bathula

{"title":"Achieving enhanced power factor using dual substitution at Cu and S sites in tetrahedrites thermoelectric materials Cu12Sb4S13","authors":"Abhigyan Ojha, Sivaiah Bathula","doi":"10.1016/j.solidstatesciences.2024.107729","DOIUrl":"10.1016/j.solidstatesciences.2024.107729","url":null,"abstract":"<div><div>Thermoelectric (TE) materials-based devices are valuable for translating heat into electricity, but the cost is largely driven by the use of purified metals required for efficient TE performance. This study focuses on tetrahedrite materials, which are cost-effective due to their abundance in copper ore mining waste and status as one of the most widespread sulfosalts on Earth. The research investigates the effects of co-doping and iso-valent doping on the TE properties of p-type tetrahedrite samples, specifically Cu10Mn2Sb4S11Se2 (Sample A) and Cu10MnZnSb₄S11Se2 (Sample B). These samples were synthesized using hot pressing at 773 K and compared with the existing pristine compound (Cu10Mn2Sb4S13). Doping with Mn and Zn (1:1) at the Cu site was found to optimize carrier concentration and enhance phonon scattering, leading to an improved power factor. Additionally, the Se substitution at the S site also introduced band degeneracy, further increasing the power factor. Further, sample B exhibited the highest Seebeck coefficient (∼300 μV/K) at 650 K, in comparison to Sample A (∼225 μV/K) and the pristine compound (∼250 μV/K). On the other hand, Sample A demonstrated significantly higher electrical conductivity (∼0.76 × 10⁴ S/m at 650 K), ∿ three times greater than that of the other prepared samples. Notably, the power factor of Sample A (∼0.389 mW/mK2 at 650 K) was more than twice that of Sample B (∼0.141 mW/mK2) and the pristine compound (∼0.160 mW/mK2). These findings suggest that dual-site substitution at the Cu and S positions presents a promising strategy to augment the TE performance of tetrahedrite compounds.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107729"},"PeriodicalIF":3.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527509","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}

引用次数: 0