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2023 Volume 42 Issue 7
2023, 42(7): 100099
doi: 10.1016/j.cjsc.2023.100099
Abstract:
A new 2D van der Waals material MnTeMoO6, which is obtained by the facile mechanical exfoliation technique. This material is very durable in the air, as confirmed by the unchanged Raman spectra. Polarization-dependent angle-resolved Raman tests show that MnTeMoO6 flake displays significant in-plane anisotropy.
A new 2D van der Waals material MnTeMoO6, which is obtained by the facile mechanical exfoliation technique. This material is very durable in the air, as confirmed by the unchanged Raman spectra. Polarization-dependent angle-resolved Raman tests show that MnTeMoO6 flake displays significant in-plane anisotropy.
2023, 42(7): 100100
doi: 10.1016/j.cjsc.2023.100100
Abstract:
Lattice distortion represents the fundamental factor of crystalline materials and contributes significantly to structural-related properties. Herein, we discover an unexpected temperature-induced lattice distortion in CuGeO3 nanocrystals, resulting in color changes of CuGeO3. The structural distortions in CuGeO3 nanocrystals are characterized by Rietveld analysis in detail, where its cell parameter b and cell volume reveal firstly decrease and then increase characteristics and correspond well with the XRD patterns and Raman spectra. Besides, both the experimental characterizations and theoretical calculations confirm that the optical and band structural changes mainly arise from the twisted octahedral field of [CuO6], where the lattice distortions regulate the crystal field splitting energy of [CuO6] and account for its changed d-d transition. Furthermore, tetracycline photodegradation is employed as an example to evaluate the effect of lattice distortion on photocatalytic performance, which also highlights the importance of modulating lattice distortion in photocatalysis. This work provides an approach to simply regulating the lattice distortion for nanorods by manipulating calcination temperatures.
Lattice distortion represents the fundamental factor of crystalline materials and contributes significantly to structural-related properties. Herein, we discover an unexpected temperature-induced lattice distortion in CuGeO3 nanocrystals, resulting in color changes of CuGeO3. The structural distortions in CuGeO3 nanocrystals are characterized by Rietveld analysis in detail, where its cell parameter b and cell volume reveal firstly decrease and then increase characteristics and correspond well with the XRD patterns and Raman spectra. Besides, both the experimental characterizations and theoretical calculations confirm that the optical and band structural changes mainly arise from the twisted octahedral field of [CuO6], where the lattice distortions regulate the crystal field splitting energy of [CuO6] and account for its changed d-d transition. Furthermore, tetracycline photodegradation is employed as an example to evaluate the effect of lattice distortion on photocatalytic performance, which also highlights the importance of modulating lattice distortion in photocatalysis. This work provides an approach to simply regulating the lattice distortion for nanorods by manipulating calcination temperatures.
2023, 42(7): 100101
doi: 10.1016/j.cjsc.2023.100101
Abstract:
We have successfully synthesized a series of Pd/ZnCo2O4 supported catalytic materials with low noble metal loading and high activity by the impregnation method. The Pd/ZnCo2O4 catalysts containing 0.2% Pd have superior performance for oxidizing CO at 80°C, achieving 100% conversion. There is also no loss of activity after four cycles of tests, with the conversion remaining approximately 100%. Aside from that, various advanced physicochemical characterizations indicate that this excellent catalytic performance stems from the interaction between metal Pd and carrier ZnCo2O4. Pd provides a higher degree of accessibility to the active site, while ZnCo2O4 as a carrier can better stabilize Pd nanoparticles. The 0.2% Pd/ZnCo2O4 exhibits higher levels of of Pd2+ species as the electronic interaction between Pd and ZnCo2O4 improves, thus improving CO oxidation catalytic efficiency. Furthermore, the low loading of Pd is crucial for reducing the cost of noble metal catalysts and ameliorating their practicality in industrial applications.
We have successfully synthesized a series of Pd/ZnCo2O4 supported catalytic materials with low noble metal loading and high activity by the impregnation method. The Pd/ZnCo2O4 catalysts containing 0.2% Pd have superior performance for oxidizing CO at 80°C, achieving 100% conversion. There is also no loss of activity after four cycles of tests, with the conversion remaining approximately 100%. Aside from that, various advanced physicochemical characterizations indicate that this excellent catalytic performance stems from the interaction between metal Pd and carrier ZnCo2O4. Pd provides a higher degree of accessibility to the active site, while ZnCo2O4 as a carrier can better stabilize Pd nanoparticles. The 0.2% Pd/ZnCo2O4 exhibits higher levels of of Pd2+ species as the electronic interaction between Pd and ZnCo2O4 improves, thus improving CO oxidation catalytic efficiency. Furthermore, the low loading of Pd is crucial for reducing the cost of noble metal catalysts and ameliorating their practicality in industrial applications.
2023, 42(7): 100106
doi: 10.1016/j.cjsc.2023.100106
Abstract:
Porous ceramics with a pore size of 60 μm * 20 μm was printed using the multi-materials printing method. The pore size was the smallest known ceramic pore size that can be directly printed, especially the pore height of 20 μm in the longitudinal direction, which cannot be achieved by other ceramic additive manufacturing technologies. The feasibility of multi-materials 3D printing method was verified by sample printing and sintering. Further, the fiber-like effect in resin and ceramic material multi-materials printing was proposed, which enlarged the transverse pore size of the porous ceramics. This method can manufacture porous ceramics with a pore size of < 100 μm and the pore distribution and structure can be designed. This can benefit product performance and expand application fields. In addition, the proposed printing method is expected to be applied in micro-chemical industries to manufacture ceramic mixers, dispersers, reactors, heat exchangers, ceramic microfluidic chips, and micro-ceramic scaffolds.
Porous ceramics with a pore size of 60 μm * 20 μm was printed using the multi-materials printing method. The pore size was the smallest known ceramic pore size that can be directly printed, especially the pore height of 20 μm in the longitudinal direction, which cannot be achieved by other ceramic additive manufacturing technologies. The feasibility of multi-materials 3D printing method was verified by sample printing and sintering. Further, the fiber-like effect in resin and ceramic material multi-materials printing was proposed, which enlarged the transverse pore size of the porous ceramics. This method can manufacture porous ceramics with a pore size of < 100 μm and the pore distribution and structure can be designed. This can benefit product performance and expand application fields. In addition, the proposed printing method is expected to be applied in micro-chemical industries to manufacture ceramic mixers, dispersers, reactors, heat exchangers, ceramic microfluidic chips, and micro-ceramic scaffolds.
2023, 42(7): 100109
doi: 10.1016/j.cjsc.2023.100109
Abstract:
In the context of green development, the use of solar cells with renewable and environment-friendly characteristics has been rapidly growing. There has been a continuous search for materials that can enhance their performance. Black phosphorus, a new type of semiconductor material, has garnered significant attention due to its distinctive properties, particularly its direct band gap with tunable layers and high optoelectronic efficiency. This review summarizes the properties of black-phosphorus-based materials and focuses on their use as doping materials in various components of solar cells, such as the electron transport layer, hole transport layer, active layer, etc. The current challenges faced by black phosphorus materials and outlook on their future development have also been discussed.
In the context of green development, the use of solar cells with renewable and environment-friendly characteristics has been rapidly growing. There has been a continuous search for materials that can enhance their performance. Black phosphorus, a new type of semiconductor material, has garnered significant attention due to its distinctive properties, particularly its direct band gap with tunable layers and high optoelectronic efficiency. This review summarizes the properties of black-phosphorus-based materials and focuses on their use as doping materials in various components of solar cells, such as the electron transport layer, hole transport layer, active layer, etc. The current challenges faced by black phosphorus materials and outlook on their future development have also been discussed.
2023, 42(7): 100119
doi: 10.1016/j.cjsc.2023.100119
Abstract:
2023, 42(7): 100120
doi: 10.1016/j.cjsc.2023.100120
Abstract:
Structure features play an important role in machine learning models for the materials investigation. Here, two topology-based features for the representation of material structure, specifically structure graph and algebraic topology, are introduced. We present the fundamental mathematical concepts underlying these techniques and how they encode material properties. Furthermore, we discuss the practical applications and enhancements of these feature made in specific material predicting tasks. This review may provide suggestions on the selection of suitable structural features and inspire creativity in developing robust descriptors for diverse applications.
Structure features play an important role in machine learning models for the materials investigation. Here, two topology-based features for the representation of material structure, specifically structure graph and algebraic topology, are introduced. We present the fundamental mathematical concepts underlying these techniques and how they encode material properties. Furthermore, we discuss the practical applications and enhancements of these feature made in specific material predicting tasks. This review may provide suggestions on the selection of suitable structural features and inspire creativity in developing robust descriptors for diverse applications.
2023, 42(7): 100122
doi: 10.1016/j.cjsc.2023.100122
Abstract:
This work transfers the basic concept of functionalization reaction in organic chemistry to inorganic chemistry, which promotes the fusion of organic and inorganic synthetic chemistry. It opens the door for the bottom-up synthesis of organic-inorganic hybrid materials from hybrid molecules, pushing forward the control of hybrid material structures at molecular precision. The molecular scale covalent-ionic bicontinuous network suggests a new hybrid structure to combine paradoxical properties within one material, which broke the performance compromise in conventional composites. As Nature senior editor Kristina Kareh said, “The paper is a true demonstration of a new class of material”. Maybe in the near future, the hybrid molecules generated by the functionalization of inorganic ionic oligomers are expected to be used for the bottom-up design of more hybrid materials and these materials with new properties may open new application fields.
This work transfers the basic concept of functionalization reaction in organic chemistry to inorganic chemistry, which promotes the fusion of organic and inorganic synthetic chemistry. It opens the door for the bottom-up synthesis of organic-inorganic hybrid materials from hybrid molecules, pushing forward the control of hybrid material structures at molecular precision. The molecular scale covalent-ionic bicontinuous network suggests a new hybrid structure to combine paradoxical properties within one material, which broke the performance compromise in conventional composites. As Nature senior editor Kristina Kareh said, “The paper is a true demonstration of a new class of material”. Maybe in the near future, the hybrid molecules generated by the functionalization of inorganic ionic oligomers are expected to be used for the bottom-up design of more hybrid materials and these materials with new properties may open new application fields.
2023, 42(7): 100123
doi: 10.1016/j.cjsc.2023.100123
Abstract:
The controllable transformation of metal nanoclusters remains highly desirable for the preparation of new clusters with novel structures and the elucidation of cluster conversion mechanisms. Here, we present the reversible transformation between two high-nuclearity silver cluster homologs, Ag32S3(StBu)16(CF3COO)9(CH3CN)4(NO3) (abbreviated as monomer-Ag32) and [Ag32S3(StBu)16(CF3COO)9(CH3CN)(NO3)]2 (abbreviated as dimer-(Ag32)2). Triggered by the solvent effect, the reversible conversion between monomer-Ag32 and dimer-(Ag32)2 nanoclusters has been accomplished. For dimer-(Ag32)2, two CF3COO- linkers were bound onto the symmetrical edges of adjacent Ag32 subunits, giving rise to the dimeric existence form of the final cluster. The optical properties, including optical absorptions and emissions, of the cluster monomer and dimer were then compared. This work offered an interesting case for constructing self-assembled cluster structures with the assistance of certain solvents and multidentate ligands.
The controllable transformation of metal nanoclusters remains highly desirable for the preparation of new clusters with novel structures and the elucidation of cluster conversion mechanisms. Here, we present the reversible transformation between two high-nuclearity silver cluster homologs, Ag32S3(StBu)16(CF3COO)9(CH3CN)4(NO3) (abbreviated as monomer-Ag32) and [Ag32S3(StBu)16(CF3COO)9(CH3CN)(NO3)]2 (abbreviated as dimer-(Ag32)2). Triggered by the solvent effect, the reversible conversion between monomer-Ag32 and dimer-(Ag32)2 nanoclusters has been accomplished. For dimer-(Ag32)2, two CF3COO- linkers were bound onto the symmetrical edges of adjacent Ag32 subunits, giving rise to the dimeric existence form of the final cluster. The optical properties, including optical absorptions and emissions, of the cluster monomer and dimer were then compared. This work offered an interesting case for constructing self-assembled cluster structures with the assistance of certain solvents and multidentate ligands.
2023, 42(7): 100124
doi: 10.1016/j.cjsc.2023.100124
Abstract:
The search for new degrees of freedom in photoelectric functional crystals is a promising area of research that has the potential to revolutionize the development of advanced optoelectronic materials and devices. Searching for new degrees of freedom is the key to designing photoelectric functional crystals. By coupling the multiple degrees of freedom of the molecules, the contributions of the crystal properties can be clearly identified, and multi-scale quantum design of photoelectric functional crystals can be achieved from the origin of functionality. Through exploring novel phenomena and mechanisms, researchers can potentially discover materials with unprecedented photoelectric functionalities and superior performance. The synergy between experimental and theoretical studies is crucial for the discovery and optimization of these materials, as it enables researchers to accurately predict the behavior of materials and guide experimental efforts. The development of new photoelectric functional crystals has significant implications for the fields of optoelectronics and solar energy conversion technologies. The discovery of new materials with enhanced photoelectric functionalities has the potential to increase the efficiency and reliability of solar cells, leading to more widespread adoption of solar energy. Furthermore, the development of novel optoelectronic devices based on photoelectric functional crystals could lead to breakthroughs in areas such as data storage and communication. Overall, continued research and development in this area will pave the way for the next generation of optoelectronics and solar energy conversion technologies.
The search for new degrees of freedom in photoelectric functional crystals is a promising area of research that has the potential to revolutionize the development of advanced optoelectronic materials and devices. Searching for new degrees of freedom is the key to designing photoelectric functional crystals. By coupling the multiple degrees of freedom of the molecules, the contributions of the crystal properties can be clearly identified, and multi-scale quantum design of photoelectric functional crystals can be achieved from the origin of functionality. Through exploring novel phenomena and mechanisms, researchers can potentially discover materials with unprecedented photoelectric functionalities and superior performance. The synergy between experimental and theoretical studies is crucial for the discovery and optimization of these materials, as it enables researchers to accurately predict the behavior of materials and guide experimental efforts. The development of new photoelectric functional crystals has significant implications for the fields of optoelectronics and solar energy conversion technologies. The discovery of new materials with enhanced photoelectric functionalities has the potential to increase the efficiency and reliability of solar cells, leading to more widespread adoption of solar energy. Furthermore, the development of novel optoelectronic devices based on photoelectric functional crystals could lead to breakthroughs in areas such as data storage and communication. Overall, continued research and development in this area will pave the way for the next generation of optoelectronics and solar energy conversion technologies.
