Article
Chemistry, Applied
Kai Shen, Mingxiang Jiang, Xinwei Yang, Weizhong Zhou, Qiguang Dai, Xingyi Wang, Li Wang, Yun Guo, Yanglong Guo, Wangcheng Zhan
Summary: The catalytic combustion of trichloroethylene (TCE) was studied using cerium-based catalysts, which exhibited surprising catalytic activity. MnOx was doped into CeO2 using a citric acid sol-gel method, and the effect of Mn content on the physicochemical properties and catalytic activities of MnOx-CeO2 mixed oxides was systematically investigated. The introduction of MnOx into CeO2 significantly improved the catalytic activity and reaction stability of the CeO2 catalyst, and the catalytic activity could be maintained for over 100 hours under an air atmosphere. Moreover, a possible reaction mechanism and catalytic cycle for the catalytic combustion of TCE over MnOx-CeO2 mixed oxide catalysts are proposed.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Multidisciplinary
Yungang Wang, Xu Liang, Yanjun Dai, Li Zou, Dou Sun, Feixiang Li
Summary: In this study, a composite metal oxide catalyst Cu-x-Mn-y/SBA-15 was prepared by loading Cu and Mn on SBA-15 molecular sieve, and its catalytic performance in VOCs treatment was investigated. The results showed that the catalyst exhibited excellent catalytic activity and stability, achieving high toluene conversion rate.
Article
Engineering, Environmental
Zhan Shi, Fang Dong, Zhicheng Tang, Xiuyan Dong
Summary: To enhance the sulfur resistance of 3DOM LaCoO3 perovskite catalysts, strontium (Sr) and manganese (Mn) elements were doped. The co-doping of Sr and Mn resulted in superior catalytic performance for benzene combustion and significantly improved the sulfur resistance. The research provides valuable reference for the development of efficient catalysts for industrial degradation of benzene.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Na Ye, Jie Zheng, Kaiyuan Xie, Baishun Jiang, Shufeng Zuo
Summary: In this study, (Ce,Cr)-MOF with different Ce/Cr molar ratios were prepared using a hydrothermal method, and a series of CeO2-Cr2O3 mixed metal oxides (CeCr-MMO) with mesoporous structure were obtained by thermal decomposition of these MOFs at different temperatures. The physicochemical properties of the materials were characterized, and it was found that thermal decomposition temperature (TDT) and Ce/Cr molar ratios significantly influenced the structure and performance of CeCr-MMO. The catalyst with a Ce/Cr molar ratio of 4:1 exhibited the highest catalytic activity, completely degrading benzene at 230 degrees C. The interaction between CeO2 and Cr2O3 was concluded to enhance the concentration of active species on the catalyst surface, thereby improving the catalytic performance. Moreover, CeCr(4:1)-MMO-400 showed excellent durability against chlorobenzene and H2O during continuous reaction for 100 hours.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Applied
Hajime Hojo, Yuka Inohara, Ryo Ichitsubo, Hisahiro Einaga
Summary: In this study, LaNiO3 was prepared and modified with Mn, and its catalytic activity for CO and benzene oxidation was investigated. LaNiO3 showed higher CO oxidation activity than other perovskite oxides, which was attributed to the reactivity of the lattice oxygen. Mn-modified LaNiO3 exhibited higher activity for benzene oxidation, and the catalytic properties were correlated with the amount of Mn on the catalyst surface.
Article
Materials Science, Multidisciplinary
Yuan Qu, Simin Zhu, Long Zhang, Shikuan Sun, Xiaoping Dong, Limin Guo
Summary: The Zr-Mn mixed oxides were synthesized with various Zr/Mn molar ratios and applied to the catalytic combustion of benzene. The results showed that Zr/MnO2-0.2 catalyst exhibited the best catalytic activity, with specific structural characteristics contributing to the enhanced catalytic performance.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Applied
Qingwen Wang, Wenyong Deng, Xinchen Lin, Xigen Huang, Ling Wei, Lei Gong, Changxiang Liu, Guangbin Liu, Qian Liu
Summary: Mesoporous Ce-Mn-Co ternary metal oxide fabricated via an efficient oxalate-precursor-based soft reactive grinding route showed excellent activity in advanced oxidation of methylene blue in water, attributed to the synergistic effect of Ce, Mn, and Co promoting the formation of more lattice defects, higher specific surface area, and smaller particle size.
JOURNAL OF RARE EARTHS
(2021)
Article
Engineering, Environmental
Siyu Ding, Chen Zhu, Hajime Hojo, Hisahiro Einaga
Summary: The study investigated microwave-assisted heterogeneous catalytic oxidation of benzene using Cu-Mn spinel oxides, which showed superior activity and lower apparent activation energy under microwave heating, reducing the required reaction temperature. Transient tests revealed the high reactivity of Cu-Mn spinel oxides related to lattice oxygen on the catalyst surface, which was enhanced under microwave heating, leading to an accelerated benzene oxidation reaction. The combination of adsorption and catalytic oxidation processes efficiently decomposed benzene at low concentrations using Cu-Mn spinel oxides and zeolites.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Wei Sun, Shijie Shao, Jun Pan, Yangyang Wang, Hangqi Xia, Xiaohui Gao, Hao Zhang, Qiguang Dai, Li Wang, Xingyi Wang
Summary: Ce-Ti-Zr mixed oxide catalysts prepared by sol-gel method exhibit high activity and stability for CH2Cl2 oxidation. The incorporation of Ce and Zr promotes the formation of hydroxyl groups, Lewis acidity and surface oxygen, leading to efficient CH2Cl2 removal.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Applied
Alanna Silveira De Moraes, Gabriela Oliveira Castro Poncinelli, Aron Seixas Terra Rodrigues, Laise Fazol Do Couto, Silvia Luciana Favaro, Rita De Cassia Colman
Summary: The successful synthesis of AMn(2)O(4) spinels via solution combustion was achieved in less time than other methods. The relationship between the properties and activities of the catalysts with the same fuel/nitrate ratio was investigated. Among them, nickel manganite exhibited the highest activity, and the most appropriate structure for the reaction was sought by changing the fuel/nitrate ratio. Physico-chemical analysis was used to define the characteristics of the synthesized catalysts. BET-BJH analyses revealed mesoporous structures, and the SEM images showed the influence of urea content.
CHEMICAL INDUSTRY & CHEMICAL ENGINEERING QUARTERLY
(2023)
Article
Materials Science, Multidisciplinary
Yi-Jie Lao, Xing-Xing Jiang, Ju Huang, Zhen Zhang, Xing-Yi Wang
Summary: The La/Ce(0.5)Mn(0.5) catalyst prepared by wetness impregnation showed high activity and stability in the catalytic oxidation of ethyl acetate, converting it into CO2 with high efficiency. The intermediates identified were mainly ethanol and acetaldehyde, with concentrations below certain levels. The dissociative adsorption modes of ethyl acetate on the catalyst surface were found to be related to the surface oxygen species, affecting the stability and selectivity of the catalyst.
Article
Chemistry, Physical
Tahrizi Andana, Kenneth G. Rappe, Nicholas C. Nelson, Feng Gao, Yong Wang
Summary: A composite catalyst made of ceria-manganese oxide and Cu-SSZ-13 shows improved selective catalytic reduction (SCR) of NOx by ammonia at low temperatures, primarily through the interaction of the oxide phase with Bronsted acid bound NH3.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Qingji Ying, Yue Liu, Yaoyu Zhang, Zhongbiao Wu
Summary: The in situ sulfation modification improved the performance of Cu/TiO2 catalysts for DCM catalytic combustion, with surface sulfate groups providing abundant Bronsted acidic sites to prevent Cl poisoning. The 1CuSO(4)/TiO2 sample showed the best activity, balancing acidity and redox capacity. CuSO4/TiO2 could partially replace noble-metal Ru/TiO2 catalysts, showing comparable performances for CVOCs catalytic combustion.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Zhen-Hong He, Zhu-Hui Li, Zhong-Yu Wang, Kuan Wang, Yong-Chang Sun, Sen-Wang Wang, Wei-Tao Wang, Yang Yang, Zhao-Tie Liu
Summary: The study focuses on the preparation of Co-Cu-Mn trimetallic catalysts for catalyzing photothermal CO2 reduction, highlighting the significant influence of the metal composition and reduction temperature on the catalysts' performance. Among the tested catalysts, Co7Cu1Mn1Ox(200) showed high activity for producing methane under specific conditions.
Article
Chemistry, Physical
Mohammad Varbar, Seyed Mehdi Alavi, Mehran Rezaei, Ehsan Akbari
Summary: The textural features and catalytic efficiency of Mn-promoted Ni/MgAl2O4 catalysts were evaluated in the catalytic combustion of lean methane. The addition of manganese oxide improved the structural features and light-off temperatures, while the decrease in calcination temperature further increased the catalyst performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Qinli Zhang, Hao Wu, Yan Feng, Daolin Wang, Huaibin Su, Xiaoshuang Li
Summary: This study explores the effect of solid content (SC), lime-to-sand ratio, and sulfonated naphthalene formaldehyde (SNF) dosage on the rheological and physicomechanical properties of rod milling sand-based cemented paste backfill (RCPB). The results show that the performance of RCPB is influenced by the SNF dosage, lime-to-sand ratio, and SC. The addition of SNF improves the workability and cohesion of RCPB, as well as enhances its early compressive strength.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Energy & Fuels
Qiongqiong Tang, Yuanbo Chen, Rui Jia, Wei Guo, Weiqiang Chen, Xiaoshuang Li, Huicai Gao, Yu Zhou
Summary: Knowledge of the mechanical properties of natural gas hydrate reservoirs is crucial for the safe and commercial extraction of natural gas hydrate. This study investigated the effects of clay type and content on the failure strength and deformation of clayey silt hydrate sediments. It was found that samples containing illite generally exhibited higher strength and stiffness, while samples containing montmorillonite had higher cohesion. These findings provide valuable insights for the assessment of reservoirs and the design of safe wellbores.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Hong-Xiang An, Bao-Shi Qiao, Zhi-Hong Zhang, Zhen-Dong Lian, Zhipeng Wei, Xiao-Shuang Li, Qing-Guang Zeng, Bo Wang, Kar Wei Ng, Shuang-Peng Wang
Summary: High-quality RbCu2I3 microwires were successfully synthesized by a fast-cooling hot saturated solution method. The microwires exhibited an orthorhombic structure with a smooth surface. Optical measurements showed sharp ultraviolet absorption and ultralarge Stokes shift (300 nm) in photoluminescence of RbCu2I3 microwires. The photodetector based on a single RbCu2I3 microwire demonstrated excellent ultraviolet detection performance, with a specific detectivity of 5.0 x 10(9) Jones and a responsivity of 380 mA center dot W-1. The synthesis method and physical properties of RbCu2I3 can guide the future optoelectronic application of this new material.
Article
Materials Science, Multidisciplinary
Xiaoshuang Li, Tianpeng Liu, Kang Zhang, Zhiyu Hu, Hongxiang An, Shuwei Deng, Youchao Kong, Bo Wang
Summary: In this study, manganese-based magnetoplumbite-type La(Zn,Mn)Al11O19 phosphors were successfully synthesized and characterized. The LaZn0.7Mn0.3Al11O19 and LaZn0.2Mn0.8Al11O19 phosphors exhibited the highest emission intensity under excitation at 450 nm, with maximum quantum efficiencies of 99% and 55% respectively. An anomalous near-infrared emission band at approximately 730 nm was observed for LaZnAl11O19 with heavy Mn2+ doping, attributed to Mn2+-Mn2+ dimers. These findings not only provide a viable strategy for synthesizing innovative NIR phosphors, but also contribute to the development of high-power photonic devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Xiaolin Hou, Hongyu Zhai, Chunlai Wang, Tingting Wang, Xiang He, Xiang Sun, Zhian Bai, Baokun Zhou, Xiaoshuang Li
Summary: In this research, a method based on microcrack distribution was proposed to characterize the crack space of rock specimens. Acoustic emission technology was used to obtain the spatial distribution of microcracks in sandstone under uniaxial compression. The geometric features of the crack space were analyzed using the theoretical distribution pattern space (TDPS), 3D convex hull, and the minimum volume enclosing ellipsoid (MVEE) algorithms. The results showed that the 3D convex hull method provided the smallest results in both area and volume of the crack space, while the TDPS method provided the largest results. The deviation between the TDPS method and the MVEE method decreased after 85%. The results suggest that a spatial scale from 65% to 85% is a reliable range for characterizing the crack space.
APPLIED SCIENCES-BASEL
(2023)
Article
Geosciences, Multidisciplinary
Meibao Chen, Xiaofei Jing, Dongxu Xie, Xiaoshuang Li, Yuanzhen Zhang, Xiaohua Liu
Summary: Little attention has been paid to the study of overtopping hydraulic erosion damage characteristics of reinforced tailings dams. Establishing a prediction model for the overtopping of reinforced tailings dams is of great importance.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Xiaohua Ding, Zhongchen Ao, Xiaoshuang Li, Shuangshuang Xiao, Mao Wu, Bokang Xing, Ruhao Ge, Donghua Zhang
Summary: This paper explains the deformation damage and motion law caused by the detonation of blocked material in the gun hole by simulating the motion of the blocked material in the gun hole. It introduces geological polymer to improve the harmful effects of blasting and conducts a field test to demonstrate that the modified blocking material can enhance blockage ability, reduce large block rate, dust and flying stone, and improve production efficiency and safety.
Article
Chemistry, Multidisciplinary
Fuqi Kang, Guangjin Wang, Yaoji Li, Binting Cai, Shujian Li, Lei Zhao, Xiaoshuang Li
Summary: Through a series of dynamic triaxial experiments, the dynamic characteristics of tailing silt under cyclic stress were explored. Increasing the density of the sample significantly improved its liquefaction resistance, and the stress-strain curves of tailing silt were discussed.
APPLIED SCIENCES-BASEL
(2023)
Article
Geosciences, Multidisciplinary
Nanxiang Hu, Jiabing Zhang, Lin Teng, Yiping Lu, Yingchun Li, Xiaoshuang Li, Chun Zhu
Summary: By investigating the toppling displacement evolution characteristics of anti-dip rock slopes, the study utilized ArcGIS to obtain the geological geometric distribution characteristics of the slope. The Inverse Distance Weight method was then used to interpolate the spatio-temporal evolution of toppling displacement. The analysis revealed that the horizontal displacement primarily controls the overall deformation of the slope, with the most significant deformation occurring at the boundary between the Triassic Jialingjiang Formation (T1j) and the Triassic Daye Formation (T1d).
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Dingjun Xiao, Wentao Yang, Moujin Lin, Xiaoming Lu, Kaide Liu, Jin Zhang, Xiaoshuang Li, Yu Long
Summary: An air explosion protection experiment was conducted to investigate the influences of an explosion-proof wall on shock wave parameters. The experiment established the time history of shock wave pressure and analyzed the characteristics of shock wave impulse and dynamic pressure. The results showed that the explosion-proof wall effectively attenuated the explosion shock wave, but still had considerable pressure at the top. The diffraction angle affected the attenuation speed of the diffraction overpressure, and the shock wave diffraction made the bimodal structure of the shock wave more prominent. The characteristics of the bimodal structure significantly improved the damage capability of the shock wave.
Article
Chemistry, Physical
Shuwei Deng, Jinxian Feng, Youchao Kong, Xiaoshuang Li, Alain Rafael Puente Santiago, Tianwei He
Summary: Hydrogen produced from electrolysis cell driven by sustainable electricity is a clean and renewable energy source. In this study, a Ni/Co9S8 heterostructure was constructed using carbonised filter paper as a precious metal-free electrocatalyst for hydrogen evolution reaction (HER) in alkaline media. The optimized electrocatalyst exhibited an ultralow overpotential of 76 mV for HER at 10 mA cm-2 in 1.0 M KOH, and maintained a current density of 100 mA cm-2 at 380 mV (vs. RHE) for 37 hours. The enhanced HER activity was attributed to the synergistic effect of Ni and Co9S8, which improved hydrogen adsorption and water dissociation at the Ni/Co9S8 interface. This work provides a new pathway for designing high-efficient electrocatalysts for massive hydrogen production.
MOLECULAR CATALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Youchao Kong, Shurong Chen, Jie He, Shuwei Deng, Xiaoshuang Li, Jiangcong Zhou
Summary: In this paper, a novel technique for activating a long-lasting phosphor (LLP) via oxygen-vacancy-rich Ca2MgSi2O7:Eu2+ (V-O-CMSE) is proposed, which enhances the persistent luminescence of Eu2+. V-O-CMSE exhibits a long duration and high charge storage capacity, making it efficient for various applications. The intensity of V-O-CMSE is enhanced and can compensate for the flicker effect of AC-LEDs. A new approach for generating white light emission during dimming time is presented, and an AC-LED lamp with a flicker percentage drop of 29.9% is manufactured. Dynamic anti-counterfeiting applications are also demonstrated. These discoveries are likely to accelerate the development of new LLP materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Green & Sustainable Science & Technology
Xuanyi Chen, Xiaofei Jing, Xiaoshuang Li, Junji Chen, Qiang Ma, Xiaohua Liu
Summary: This study investigated the crack propagation law and influence of cracks on expansive soil slopes under drying-wetting conditions through a large-scale indoor slope test. Soil moisture content change at different depths during drying-wetting cycles was monitored, and crack depths in the soil were measured. The cracks on the slope's surface were analyzed, and the influence of moisture content change on expansive soils and the failure mode of surface soil were determined. Quantification of surface cracks and simulation software confirmed the relationship between the number of drying-wetting cycles, the number of cracks, and the damage to the slope.
Correction
Biochemical Research Methods
Peiran Jiang, Ying Chi, Xiao-Shuang Li, Zhenyu Meng, Xiang Liu, Xian-Sheng Hua, Kelin Xia
BRIEFINGS IN BIOINFORMATICS
(2023)
Article
Geosciences, Multidisciplinary
Xiaoshuang Li, Qihang Li, Guoqing Hou, Feng Zhang, Jun Lu
Summary: This study investigates the dump slope instability induced by rainfall in Kunyang phosphate mine, using field investigation, rainfall simulation experiments, and numerical analysis. The results show that the stability of dumps varies in different mining areas, with some areas at risk of landslide disaster.
GEOLOGICAL JOURNAL
(2023)
