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High concentration of Ti^(3+)in C-TiO_(x)nanosheets boosting efficient photodegradation

Science China(Technological Sciences) 2025年第3期68卷 156-166页

作者： Chongbei WU Xuan LI Haibin WANG Jiaxin TANG Shuai WEI Yuanyuan WU Aobing WANG Jizhou JIANG Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment Hebei Vocational University of Technology and EngineeringXingtai054000China School of Materials Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan430205China

Semiconductor photocatalysis holds significant promise for addressing dye-pollution in ***,the efficiency of photocatalytic water purification is constrained by the weak light absorption capacity and low active site distribution of *** a bottom-up approach,carbon-doped TiO_(x)(C-TiO_(x))nanosheets with high concentrations of Ti^(3+)active sites were fabricated by etching the Al element in Ti_(3)Ai C_(2)with H_(2)O_(2).Experimental evidence demonstrates that the optimal C-TiO_(x)nanosheets exhibit high activity for the photocatalytic degradation of methylene blue,achieving a degradation rate of 100%within 50 *** introduction of carbon into the C-TiO_(x)nanosheets induces a red shift in the absorption edge,boosting the migration of photo-generated charge ***,there is a significant correlation between the concentration of Ti^(3+)active sites and the density of oxygen vacancies in the C-TiO_(x)nanosheets,which synergistically influence the photocatalytic degradation performance of MB dye wastewater.

关键词： bottom-up strategies C-TiO_(x)nanosheets high-concentrations Ti^(3+) photocatalytic degradation

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Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationHubei Key Laboratory of Novel Reactor and Green Chemical TechnologySchool of Chemical Engineering&PharmacyWuhan Institute of TechnologyWuhan 430205HubeiChina Key Laboratory of Pesticide&Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of EducationCollege of ChemistryCentral China Normal UniversityWuhan 430079HubeiChina College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianChina

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction(OER).Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER ***,most of them undergo incomplete reconstruction with limited thickness of reconstruction layer,leading to low component utilization and arduous exploration of real catalytic ***,we identify the dynamic behaviors in complete reconstruction of Co-based complexes during *** hollow phytic acid(PA)cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability,in favor of the fast and complete reconstruction.A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co(Fe)(OH)xand subsequent potential-driven oxidation to Co(Fe)*** obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm^(-2)and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER *** work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction

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Dual-engineered strategy of Ni-CeOv nanozyme with enhanced oxidase activity for sensitive colorimetric detection of total antioxidant capacity

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Talanta 2025年 295卷 128307页

作者： Xie, Chang Peng, Jiahe Jiang, Jizhou Wang, Huawei Lyu, Zhixian Li, Jun Xu, Qitong Chen, Ding Cao, Yan Wang, Lipan Mei, Surong Ministry of Environmental Protection School of Public Health Tongji Medical College Huazhong University of Science and Technology #13 Hangkong Road Hubei Wuhan430030 China School of Materials Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan430205 China Hongshan District Center for Disease Control and Prevention Hubei Wuhan430000 China

Antioxidants are crucial in the fight against reactive oxygen species and thus in maintaining organismal health, so it is particularly important to realize a rapid and quantitative assay for common antioxidants in life. Current nanozyme-based total antioxidant capacity (TAC) assays face limitations: hydrogen peroxide (H2O2) dependence, noble metal costs, and poor antioxidant discrimination. To address these challenges, we engineered a dual-regulated Ni-doped CeO2 (Ni-CeOv) nanozyme through oxygen vacancy engineering and 3d-2p-4f orbital coupling. Density functional theory (DFT) calculations revealed that Ni doping synergistically affects the spontaneous formation of oxygen vacancies and enhances electron transfer through gradient orbital hybridization, resulting in a 2-fold increase in oxidase-like activity (Vmax = 0.10 μM/s) compared to undoped CeO2. Leveraging this H2O2-independent nanozyme, we developed a portable colorimetric platform capable of both ultra-sensitive detection and antioxidant discrimination through distinct inhibition kinetics. Integration with smartphone-based paper sensors enabled on-site TAC quantification in commercial beverages and cosmetics within 5 min, achieving recovery rates of 98.35–104.41 %, at a cost of only $0.2/assay. This work establishes a paradigm for developing low-cost, field-deployable nanozyme sensors for the detection of TAC. © 2025 Elsevier B.V.

关键词： Nanosaws

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Experimental detection of bubble-wall interactions in a vertical gas–liquid flow

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Chinese Journal of Chemical Engineering 2017年第7期25卷 838-847页

作者： Xing Wang Jiao Sun Jie Zhao Wenyi Chen Department of Process Equipment and Control Engineering Hehei University oI TechnologyTianjin 300130China Research Center of Engineering Fluid and Process Enhancement Hehei University of TechnologyTianiin 300130China Department of Mechanics School of Mechanical Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Coal-based Low Carbon Energy ENN Sdence&Development Co.Ltd.Langfang 065001China

Bubble motions and bubble-wall interactions in stagnant liquid were experimentally investigated by high-speed CCD and PIV technique with the main feature parameters such as E?tv?s numbers Eo = 0.98–1.10, Morton number Mo = 3.21 × 10^(-9)and Reynolds numbers Re = 180 ~ 190. The effect of bubble injecting frequency and the distance S between the gas injection nozzle and the wall on the statistical trajectory of bubbles, average velocity distribution of flow field and Reynolds shear stress were studied in detail. It was shown that the combination of bubble injecting frequency and the distance S caused different bubble motion forms and hydrodynamic *** the normalized initial distance was very little, like S*≈ 1.2(here S*= 2S/d_e, and deis the bubble equivalent diameter), bubbles ascended in a zigzag trajectory with alternant structure of high and low speed flow field around the bubbles, and the distribution of positive and negative Reynolds shear stress looked like a blob. With the increase of distance S*, bubbles' trajectory would tend to be smooth and straight from the zigzag curve. Meanwhile, with the increase of bubble injecting frequency, the camber of bubble trajectory at 20

关键词： Vertical plane wall Bubbles Gas-liquid two-phase flow PIV

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Dual activation pathways based on OH-functionalized alk-Ti 3 C 2 MXene/RuO x boosting the hydrogen generation

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Chinese Chemical Letters 2025年

作者： Chongbei Wu Benzhi Wang Xuan Li Jiaxuan Gu Yihan Wu Zhe Zhao Pengfei Jia Jizhou Jiang Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment Hebei Center for Industrial Energy-saving and Pollution Control Research Hebei Vocational University of Technology and Engineering Xingtai 054000 China School of Mechanical Engineering and Institute of Advanced Machinery & Technology Sungkyunkwan University 2066 Seobu-ro Suwon 16419 Republic of Korea School of Material Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan 430205 China

A meticulous design of the local environment at the interface between active species and the support, aimed at optimizing the adsorption of H 2 O molecules and BH 4 ⁻ anion, offers an ideal strategy for enhancing hydrogen generation via NaBH 4 hydrolysis through dual activation pathways. Theoretical predictions based on d-band center analysis and electron transfer calculations suggest that introducing -OH functional groups induce charge redistribution, enhancing charge concentration on alk-Ti 3 C 2 and facilitating the adsorption and activation of dual active species, H 2 O molecules and BH 4 ⁻ anion. Inspired by these predictions, the optimized alk-Ti 3 C 2 /RuO x catalyst demonstrates the highest catalytic activity, achieving a hydrogen generation rate (HGR) of 9468 mL min −1 g cat. −1 . Both experimental data and theoretical analyses confirm that the -OH functional groups promote charge enrichment on alk-Ti 3 C 2 , optimizing the adsorption of H 2 O molecules and BH 4 ⁻ anion, and reducing the dissociation energy barrier of the *OH-H-TS intermediate. This dual activation pathways mechanism lowers the activation energy for NaBH 4 hydrolysis, significantly enhancing the HGR performance. These findings, guided by theoretical insights, establish alk-Ti 3 C 2 /RuO x as an efficient catalyst for NaBH 4 hydrolysis and provide a strong foundation for future hydrogen generation catalyst designs.

关键词： Alk-Ti 3 C 2 /RuO x NaBH 4 hydrolysis Dual activation pathways Theoretical calculation Catalytic mechanism

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Bottom-hole stress analysis of ultra-deep wells based on theory of poroelastic mechanics

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Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) 2020年第5期44卷 52-61页

作者： Hu, Huaigang Guan, Zhichuan Xu, Yuqiang Han, Chao Liu, Yongwang Liang, Deyang Lu, Baoping Qingdao266580 China Shandong Ultra-deep Drilling Process Control Technology Research and Development Center Qingdao266580 China SINOPEC Research Institute of Petroleum Engineering Beijing100101 China

Based on Biot's theory of poroelastic mechanics and the consideration of complex stress conditions of bottom hole rocks, a fully coupled model between seepage field and stress field was established, the dynamic change law of pore pressure and stress distribution at the well bottom was obtained by numerical calculation, and the results were verified by Warren's model. The predictive model of the rock strength failure at the bottom-hole combining with the three-dimensional Mohr-Coulomb criteria was developed. The influence of stress distribution on rock damage was discussed. By calculating the failure function, the strength condition of the rock at the bottom-hole under different working conditions and different times was analyzed. The results show that the dynamic response of the rock at the bottom-hole can be evaluated in real-time by using the established fluid-solid coupling model. Generally, the three-dimensional stress reaches the maximum value (compressive stress)instantly as the wellbore excavated, while the stress reaches the minimum value (partially tensile stress)after tens of seconds, and the rock stress at the bottom-hole will stabilize after a few hours. Under an over-balanced drilling condition, there is a risk of strength failure at a small distance inside the rock, rather than at the bottom-hole wall only when the borehole is excavated instantaneously. When the pressure difference is greater than 1.75 MPa under the condition of underbalanced drilling, the rock at the bottom-hole has a tendency of strength destruction during the whole period, and the strength failure area will expand with the pressure difference increasing. © 2020, Editorial Office of Journal of China University of Petroleum(Edition of Natural Science). All right reserved.

关键词： Rocks

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Multi-phase-field simulation in a low carbon steel for continuous cooling processes

Multi-phase-field simulation in a low carbon steel for conti...

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作者： Nishida, Yasutaka Itoh, Satoshi Sano, Mitsuhiko Ohara, Kazuhiro Corporate Research and Development Center Toshiba Corporation 1 Komukai-Toshiba-cho Saiwai-ku Kawasaki 212-8582 Japan Research and Development Center of Process Control Toshiba Mitsubishi-Electric Industrial Systems Corporation Mita43 MT Bldg. 3-13.16 Mita Minato-ku Tokyo 108-0073 Japan

ISBN: (纸本)9781617820328

Recently, phase-field method has been developed in material science in mesoscopic scale as a powerful tool to simulate complex microstructure formation (for example, crystal grain growth, spinodal decomposition, dendrite growth, etc.). In this study, we performed the simulation of the phase transformation from the austenite to the ferrite (γ-α transformation) and the eutectoid transformation of the pearlite in a low carbon steel by using the Multi-Phase-Field (MPF) method. As a result, we investigated a change of the microstructure under various continuous cooling processes during the γ-α transformation, and the cooperative growth of the pearlite during the eutectoid transformation. Furthermore, by considering the combination of the two phase MPF simulation during the γ-α transformation and the three phase MPF simulation during the eutectoid transformation, we proposed a development of MPF method to treat the continuous microstructure change from higher temperature region than A3-temperature to lower temperature region than A1-temperature. Copyright © 2010 MS&T'10®.

关键词： Pearlite

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An Explicit Formula and an Optimal Weight for the 2-Block Structured Singular Value Interaction Measure

An Explicit Formula and an Optimal Weight for the 2-Block St...

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American control Conference (ACC)

作者： Carl N. Nett James A. Uthgenannt Control Technology Branch General Electric Corporate Research and Development Center Schenectady NY USA Process Information and Control Group General Electric Plastics Business Group Pittsfield MA USA

An explicit formula for the 2-block structured singular value interaction measure is derived. This formula is utilized to establish the existence of optimal weights for this measure and an explicit formula for an optimal weight is given. A general, sequential algorithm for the design of stabilizing decentralized controllers is developed as an application of these results, illustrating the general utility of these results for the 2-block structured singular value interaction measure in applications involving m-block decentralized control structures.

关键词： Automatic control Algorithm design and analysis Distributed control Guidelines Closed-form solution Plastics Weight measurement Sufficient conditions Frequency dependence Feedback

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Unveiling the geometric site dependent activity of spinel Co_(3)O_(4)for electrocatalytic chlorine evolution reaction

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Journal of Energy Chemistry 2024年第5期92卷 95-103页

作者： Linke Cai Yao Liu Jingfang Zhang Qiqi Jia Jiacheng Guan Hongwei Sun Yu Yu Yi Huang Key Laboratory of Pesticide&Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of EducationCollege of ChemistryCentral China Normal UniversityWuhan 430079HubeiChina Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationHubei Key Laboratory of Novel Reactor and Green Chemical TechnologySchool of Chemical Engineering&PharmacyWuhan Institute of TechnologyWuhan 430205HubeiChina College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianChina School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601AnhuiChina

Spinel cobalt oxide(Co_(3)O_(4)),consisting of tetrahedral Co^(2+)(CoTd)and octahedral Co^(3+)(CoOh),is considered as promising earth-abundant electrocatalyst for chlorine evolution reaction(CER).Identifying the catalytic contribution of geometric Co site in the electrocatalytic CER plays a pivotal role to precisely modulate electronic configuration of active Co sites to boost ***,combining density functional theory calculations and experiment results assisted with operando analysis,we found that the Co_(Oh) site acts as the main active site for CER in spinel Co_(3)O_(4),which shows better Cl^(-)adsorption and more moderate intermediate adsorption toward CER than CoTd site,and does not undergo redox transition under CER condition at applied *** by above findings,the oxygen vacancies were further introduced into the Co_(3)O_(4) to precisely manipulate the electronic configuration of Co_(Oh) to boost Cl^(-)adsorption and optimize the reaction path of CER and thus to enhance the intrinsic CER activity *** work figures out the importance of geometric configuration dependent CER activity,shedding light on the rational design of advanced electrocatalysts from geometric configuration optimization at the atomic level.

关键词： Chlorine evolution reaction Geometry effects Active chlorine Electronic configuration optimization Spinel oxides

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Opportunities of prebiotics for the intestinal health of monogastric animals

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Animal Nutrition 2020年第4期6卷 379-388页

作者： Md A.K.Azad Jing Gao Jie Ma Tiejun Li Bie Tan Xingguo Huang Jie Yin College of Animal Science and Technology Hunan Agricultural UniversityHunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and PoultryChangsha410128China Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionChangsha410125China University of Chinese Academy of Sciences Beijing100049China

The goal of prebiotic applications from different sources is to improve the gut ecosystem where the host and microbiota can benefit from *** has already been recognized that prebiotics have potential roles in the gut ecosystem because gut microbiota ferment complex dietary macronutrients and carry out a broad range of functions in the host body,such as the production of nutrients and vitamins,protection against pathogens,and maintenance of immune system *** gut ecosystem is very crucial and can be affected by numerous factors consisting of dietary constituents and commensal *** review focuses on recent scientific evidence,confirming a beneficial effect of prebiotics on animal health,particularly in terms of protection against pathogenic bacteria and increasing the number of beneficial bacteria that may improve epithelial cell barrier *** has also been reviewed that modification of the gut ecosystem through the utilization of prebiotics significantly affects the intestinal health of ***,the identification and characterization of novel potential prebiotics remain a topical issue and elucidation of the metagenomics relationship between gut microbiota alteration and prebiotic substances is necessary for future prebiotic studies.

关键词： Prebiotics Gut microbiota Intestinal health Short-chain fatty acids

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