Article
Multidisciplinary Sciences
Wen Xu, Jiamu Liu, Bin Dong, Jindou Huang, Honglong Shi, Xiangxin Xue, Mao Liu
Summary: This study directly identifies the doping mechanism of lanthanide-doped lead halide perovskites at an atomic level and observes cluster phenomenon in perovskite single crystals.
Article
Chemistry, Physical
Dan Zheng, Yaorong Su, Da Wen, Zheng Zhang, Peiyi Yang, Xinyuan Ma, Yewang Chen, Liwei Deng, Shuang Zhou, Aiyun Meng
Summary: This study presents a unique multivariate modified graphitic carbon nitride (g-C3N4) photocatalyst for efficient hydrogen peroxide (H2O2) production. By incorporating K and I species as heteroatomic co-dopant and defect engineering in g-C3N4, the resulting photocatalyst exhibits enhanced efficiency compared to other g-C3N4-based photocatalysts.
JOURNAL OF CATALYSIS
(2023)
Review
Chemistry, Physical
Yujun Xie, Anqi Zhou, Xiaoshan Zhang, Qiongrong Ou, Shuyu Zhang
Summary: In recent years, lead halide perovskite (LHP) nanocrystals have shown rapid development as promising functional nanomaterials with great potential in optoelectronic applications. Overcoming the toxicity of lead and optimizing material performance by substituting lead ions with alternative metal ions are important for their commercialization. This review summarizes the recent progress in lead-substitution strategies and discusses the functionalities induced by various doped ions. The synthesis, nucleation and growth of all-inorganic LHP nanocrystals are introduced, followed by a detailed discussion on the crystalline structure, electronic band structure, defect states, exciton binding energy, exciton photodynamic process and stability. The importance of theoretical calculations and experimental characterizations for guiding high-performance semiconductor nanomaterials is highlighted. Finally, the applications of light emission are discussed, and future research directions for the controllable synthesis of halide perovskite nanocrystals with low toxicity, superior reproducibility, and properties are outlined.
Article
Nanoscience & Nanotechnology
Huaipeng Pang, Peipei Sun, Hongyu Gong, Na Zhang, Jinchao Cao, Runhao Zhang, Mingfu Luo, Yong Li, Guanliang Sun, Yuguo Li, Jianlin Deng, Meng Gao, Meng Wang, Biao Kong
Summary: In this study, a convenient method was used to transform natural balsa wood into a layered porous carbon material, FeCo alloy supported on a N, S-doped wood-based carbon aerogel (FeCo@NS-CA) as the cathode in rechargeable flow zinc-air batteries (ZABs). The obtained FeCo@NS-CA with a porous lamellar architecture exhibits superior bifunctional electrocatalysis, including excellent electrochemical activities and superior stabilities, showing potential for energy-related applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Ahra Yi, Sangmin Chae, Hanbin Lee, Sung Hun Lee, Do-Hyung Kim, Hyo Jung Kim
Summary: The study demonstrates the positive effects of using Li:Cu:NiOx co-doping method in NiOx HTLs and PSCs for improving electrical properties and the quality of perovskite films, resulting in high-efficiency inverted solar cells.
Article
Engineering, Environmental
Biao Zeng, Guo Lin, Jing Li, Wei Wang, Libo Zhang
Summary: A bimetallic coordination polymer with Ti metal doping (Ti/Zr-TA) was synthesized for effective removal of mercury in wastewater. Batch experiments revealed the optimum pH, maximum adsorption capacity, and thermodynamic behavior of Ti/Zr-TA. Selectivity experiments demonstrated its strong interaction with Hg(II) and excellent reusability.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Zheng-Yi Choong, Mohamed Faisal Gasim, Kun-Yi Andrew Lin, Tuan Sherwyn Hamidon, Hazwan Hussin, Wen -Da Oh
Summary: Multi-heteroatom doping enhances the affinity of biochar for catalysis. A series of N, S-codoped biochar (BSN) were synthesized at different temperatures using a one-pot calcination protocol. BSN-800 showed the best performance as a peroxymonosulfate (PMS) activator for gatifloxacin (GAT) removal due to its high specific surface area and synergistic effect between heteroatoms. The study provides a better understanding and potential application of multi-heteroatom-doped biochar as a catalyst for antibiotics removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Zongliang Xiao, Jie Liu, Shikun Qin, Xinning Xu, Huan Chang, Jianlei Liu, Taoyong Liu, Lei Han, Qian Zhang
Summary: A series of Dy3+/Tm3+-codoped phosphate glasses with different groups were prepared and showed good absorption and emission performance, as well as thermal stability, indicating their potential applications in lighting.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
V. E. Ceniceros-Orozco, J. Escorcia-Garcia, C. A. Gutierrez-Chavarria, V Agarwal, H. Uriel Lopez-Herrera
Summary: This study investigates the influence of CaO content on the properties of Sm3+-doped calcium sodium borosilicate glasses. The addition of CaO results in the formation of wollastonite nanocrystals and an increase in [BO4]- units in the glass structure. The PL intensity of Sm3+-doped glasses is enhanced by the addition of CaO, reaching a maximum at 30 mol%. The optimal doping concentration of Sm2O3 produces orange-reddish emission.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Wanxin Zhuang, Huiwen Liu, Yang Chen, Wenzhe Xu, Hang Gao, Ye Tian, Dong Yao, Hao Zhang
Summary: Lead-free double perovskite nanocrystals with tunable self-trapped exciton emission in the blue region are synthesized through A, B-site codoping strategy. The introduction of Sb3+ into the B-site improves the emission efficiency, while altering the amount of A-site doped Rb+ allows for tunable emission peak from 447 to 528 nm. These Rb+, Sb3+-codoped Cs2NaInCl6 nanocrystals exhibit robust photoluminescence and phase stability against moisture, making them promising materials for illumination and display applications.
CERAMICS INTERNATIONAL
(2023)
Article
Environmental Sciences
Chien-Te Hsieh, Po-Yu Sung, Yasser Ashraf Gandomi, Kuan Shiong Khoo, Jeng-Kuei Chang
Summary: By using a highly efficient solid-phase microwave-assisted synthesis technique, nitrogen and boron doped graphene quantum dots (GQDs) were successfully synthesized. These doped GQDs were utilized as sensing probes for detecting pesticides and iron ions in aqueous solutions. The maximal B/C and N/C atomic ratios in the GQD structures reached as high as 28.6 and 86.4 at.%, respectively.
Article
Materials Science, Multidisciplinary
Yingying Ma, Ting Wen, Ke Liu, Dequan Jiang, Mei-Huan Zhao, Chuanlong Lin, Yonggang Wang
Summary: In this study, pressure-induced enhancement of upconversion photoluminescence (UC PL) by 1.2-2.6 times in Ln(3+) (19%Yb3+/1%Er3+, 19%Yb3+/1%Ho3+, and 19.9%Yb3+/0.1%Tm3+)-codoped LiYF4 and LiLuF4 was observed in the range of 10.0-25.0 GPa. The structure transitions of LiYF4 and LiLuF4 at around 10.0 GPa were confirmed by in situ X-ray diffraction and Raman spectra, and the completely amorphous state showed improved UC emissions. The research demonstrates the potential of pressure as a powerful tool for designing high-efficiency UC PL materials and provides insights into the structure-luminescence relationship.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Torben Steenbock, Tobias Dittmann, Gabriel Bester
Summary: In this study, the spin coupling and energetics of Mn clusters in Mn-doped ZnS quantum dots were investigated using density functional theory calculations. It was found that the spin coupling between nearest neighbor Mn dopant spins is moderately antiferromagnetic and becomes negligible when the Mn atoms are in second nearest neighbor position. Furthermore, the structures where the Mn atoms are clustered were found to be more stable compared to the more homogeneous distribution of Mn dopant atoms. These findings suggest a potential shortcoming of the strategy to enhance magnetic and magneto-optical responses by increasing the dopant concentration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yeshu Tan, Jianrui Feng, Haobo Dong, Longxiang Liu, Siyu Zhao, Feili Lai, Tianxi Liu, Ying Bai, Ivan P. Parkin, Guanjie He
Summary: This study fabricates unique heterostructures by depositing platinum nanocrystals on the edge of transition metal phosphide nanosheets, showing outstanding HER performance in an alkaline medium. The heterostructures exhibit low platinum usage amount and excellent stability. Additionally, the study provides a new strategy for designing enhanced HER performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhehan Zhang, Xiaochen Yu, Xinqi Xue, Boyang Gao, Youru Bai, Hanbo Yang, Xiaojie Li, Jibin Fan, Peng Zhao
Summary: Herein, K3ScF6 upconversion luminescence (UCL) phosphors codoped with fixed Er3+, Yb3+ and various Bi3+-concentrations were prepared, and their upconversion emission properties and temperature sensing performance were investigated. The results showed that tridoping with Bi3+ ions can enhance the upconversion emission intensity, and changes in Bi3+ concentration and power density can achieve color tunability and CCT value changes. Therefore, these phosphors have potential applications in non-contact optical temperature sensors and color tunable devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chunguang Tang, Gang Sun, Yun Liu
Summary: In this study, hydrogen diffusion in amorphous Pd-H and Zr-Cu-H alloys was investigated using molecular dynamics simulations. Our simulations revealed that hydrogen diffusion in the amorphous alloys follows Arrhenius behavior, contrary to previous computational studies predicting non-Arrhenius behavior. We demonstrated that the simulated non-Arrhenius diffusion may be attributed to a systematic error caused by insufficient simulation time. Additionally, we discussed the experimental non-Arrhenius behavior of hydrogen diffusion within the context of quantum tunneling and amorphous-amorphous phase transformations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Jun Peng, Felipe Kremer, Daniel Walter, Yiliang Wu, Yi Ji, Jin Xiang, Wenzhu Liu, The Duong, Heping Shen, Teng Lu, Frank Brink, Dingyong Zhong, Li Li, Olivier Lee Cheong Lem, Yun Liu, Klaus J. Weber, Thomas P. White, Kylie R. Catchpole
Summary: Perovskite solar cells are at the forefront of emerging photovoltaic technologies due to their rapid development in efficiency and stability. This study introduces a reverse-doping process to fabricate nitrogen-doped titanium oxide electron transport layers, which significantly improves the charge transport performance and fill factor of the cells.
Article
Chemistry, Physical
Borui Liu, Juan F. Torres, Mahdiar Taheri, Pan Xiong, Teng Lu, Junwu Zhu, Yun Liu, Guihua Yu, Antonio Tricoli
Summary: This study introduces a dual-ion flux management strategy to control the distribution of Li and polysulfide ions in high-energy Li-S batteries. By using a multiscale membrane with multiple functionalities, it enables long-term use of high S-loading cathodes with good cycling performance.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Haoyue Zhang, Guangwei She, Jing Xu, Shengyang Li, Yun Liu, Jun Luo, Wensheng Shi
Summary: In this study, a Ptx(x=2,3)Si/PtSi/p-Si photocathode was designed and fabricated to improve the photovoltage and enhance the hydrogen evolution reaction kinetics for efficient H-2 generation via PEC. The use of dopant segregation elevated the Schottky barrier height, leading to a high photovoltage, while in situ formation of a high catalytic activity Ptx(x=2,3)Si layer on the photocathode significantly enhanced the HER kinetics. The photocathode achieved a favorable onset potential for HER and a high saturated photocurrent density, with a maximum ABPE of 5.8% and excellent stability in long-term PEC H-2 generation testing.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Microscopy
T. C. Petersen, C. Zhao, E. D. Bojesen, N. L. N. Broge, S. Hata, Y. Liu, J. Etheridge
Summary: Researchers utilize a geometric approach to track robust topological features under imaging conditions that violate the Radon projection assumption, enabling 3D reconstructions with emphasis on phase contrast. By invoking a sparsity assumption and segmenting interest points from the outset, noise reduction is achieved.
Article
Engineering, Environmental
Farzin Nekouei, Xiaoming Wen, Zhong Zheng, Qingbo Sun, Teng Lu, Henry Orton, Felipe Kremer, Shahram Nekouei, Tongwei Yuan, Elwy H. Abdelkader, Borui Liu, Antonio Tricoli, Gottfried Otting, Zongwen Liu, Terry Frankcombe, Yun Liu
Summary: Research on heterojunction photocatalysts with appropriate band structures and abundant interfacial sites has shown promising photocatalytic performance. This study reports the intergrowth between In(OH)(3), InOOH and In2O3 to create intergrown heterojunction structures, greatly enhancing the photocatalytic decomposition of perfluorooctanoic acid. Experimental and theoretical investigations indicate that band structure matching is essential for heterojunction photocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Chunxi Hao, Yu Wang, Teng Lu, Felipe Kremer, Ray Withers, Chang Liu, Aqun Zheng, Sen Yang, Xiaoping Song, Xiaobing Ren, Yun Liu
Summary: Large magnetostriction with low saturation magnetic field is observed in Fe-Pd ferromagnetic strain glass alloys, which is highly desirable for miniaturized sensor and actuator applications. The high performance magnetostriction is found to originate from the structure of ferromagnetic strain glass, which consists of local chemical order forming tetragonal martensitic nanodomains with local crystal symmetry breaking. The combination of martensitic nanodomains and low modulus is necessary to achieve both large magnetostriction and a low saturation field.
Correction
Materials Science, Multidisciplinary
Chunxi Hao, Yu Wang, Teng Lu, Felipe Kremer, Ray Withers, Chang Liu, Aqun Zheng, Sen Yang, Xiaoping Song, Xiaobing Ren, Yun Liu
Article
Physics, Applied
Lifeng Xiang, Yang Shi, Wei Chao, Huanyu Zhang, Qiang Li, Wenjie Hu, Wenbin Wang, Hangwen Guo, Changlin Zheng, Joanne Etheridge, Lifeng Yin, Yinyan Zhu, Xiaodong Zhou, Jian Shen
Summary: For perovskite manganites, achieving low-field colossal magnetoresistance (CMR) is crucial. In this study, the magnetic field driven insulator-to-metal transition in La1-x-yPrxCayMnO3 is investigated using real space magnetic force microscopy (MFM). Three stages of the phase transition are observed, with distinct features in domain nucleation and growth. MFM reveals that domain growth requires a lower field than domain nucleation, providing critical information for achieving low-field CMR.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Xingshuo Huang, Alan Salek, Andrew G. G. Tomkins, Colin M. M. MacRae, Nicholas C. C. Wilson, Dougal G. G. McCulloch, Jodie E. E. Bradby
Summary: In this study, the hardness of two different forms of lonsdaleite was measured using nanoindentation. The results indicate that the hardness of lonsdaleite is similar to that of diamond, suggesting that polycrystalline lonsdaleite is not significantly harder than similar forms of diamond.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Wei Wen Wong, Naiyin Wang, Bryan D. D. Esser, Stephen A. A. Church, Li Li, Mark Lockrey, Igor Aharonovich, Patrick Parkinson, Joanne Etheridge, Chennupati Jagadish, Hark Hoe Tan
Summary: In this study, we utilize the selective area epitaxy method to deterministically engineer thousands of microring lasers on a single chip. By elucidating a detailed growth mechanism and controlling the adatom diffusion lengths, we achieve ultrasmooth cavity sidewalls. These engineered devices exhibit a tunable emission wavelength in the telecommunication O-band and show low-threshold lasing with high device efficacy across the chip. This work marks a significant milestone toward the implementation of a fully integrated III-V materials platform for next-generation high-density integrated photonic and optoelectronic circuits.
Article
Physics, Condensed Matter
Krishna K. Ghose, Yun Liu, Terry J. Frankcombe
Summary: The structural and vibrational properties of rutile and anatase TiO2 were investigated using density functional theory. Different exchange-correlational energy functionals were employed, and their effects on the calculated properties were analyzed. The results showed that the choice of functional had a significant impact on the phonon dispersion relations, but had little effect on the thermodynamic properties.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Brenton Cook, Philipp Reineck, Thomas Shiell, Jodie Bradby, Bryan D. Esser, Joanne Etheridge, Bianca Haberl, Reinhard Boehler, David R. Mckenzie, Dougal G. McCulloch
Summary: Diamond is a crucial material for biosensors, quantum computing, and space components due to its unique properties at the nanoscale. Researchers have successfully synthesized oriented, faceted diamond particles by flash laser heating of glassy carbon, and observed their microstructure and periodicity.
Article
Materials Science, Multidisciplinary
Weilun Li, Wenming Tong, Joanne Etheridge, Alison M. Funston
Summary: Shape and size control of metal nanocrystals is important for tuning their physicochemical properties. In this study, the growth mechanisms of gold nanocuboids and the influence of copper additives were investigated. The presence of copper additives led to asymmetrical growth and the formation of nanobars instead of nanocubes, accompanied by a reduction in particle size. This was attributed to a combination of rapid deposition on {111} facets and slow surface diffusion rate introduced by surface copper.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)