2,443 results match your criteria: "Tianjin University of Technology.[Affiliation]"

Near-Infrared Light-Driving Organic Photothermal Agents with an 88.9% Photothermal Conversion Efficiency for Image-Guided Synergistic Phototherapy.

Adv Healthc Mater

July 2024

Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, China.

Photothermal agents (PTAs) with desirable near-infrared (NIR) absorption and excellent photothermal conversion efficiency (PCE) are ideal candidates for cancer treatment. However, numerous PTAs still require high-intensity and long-duration laser irradiation to completely ablate the tumor during the photothermal therapy (PTT) process, resulting in light damage to healthy skin and tissue as well as limiting their biomedical applications. Integrating intense NIR absorption and high PCE into a single small-molecule PTA is an important prerequisite for realizing efficient PTT, but is a serious challenge.

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Electrochemical CO reduction reaction (CORR) provides a promising route to converting CO into value-added chemicals and to neutralizing the greenhouse gas emission. For the industrial application of CORR, high-performance electrocatalysts featuring high activities and selectivities are essential. It has been demonstrated that customizing the catalyst surface/interface structures allows for high-precision control over the microenvironment for catalysis as well as the adsorption/desorption behaviors of key reaction intermediates in CORR, thereby elevating the activity, selectivity and stability of the electrocatalysts.

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Copper-catalyzed intramolecular dearomative aza-Wacker reaction of indole.

Chem Commun (Camb)

April 2024

College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road #18, Hangzhou 310014, China.

Herein, we describe a copper-catalyzed intramolecular dearomative amination of indoles a formal aza-Wacker reaction. This protocol provides an efficient method to access aza-polycyclic indoline molecules bearing exocyclic CC bonds in moderate to excellent yields in the presence of molecular oxygen as an oxidant. It is worth noting that indolin-3-ones are achieved when employing C3-non-substituted indoles as substrates.

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On-Substrate Fabrication of CsPbBr Single-Crystal Microstructures via Nanoparticle Self-Assembly-Assisted Low-Temperature Sintering.

ACS Nano

March 2024

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100049, P. R. China.

The growth of all-inorganic perovskite single-crystal microstructures on substrates is a promising approach for constructing photonic and electronic microdevices. However, current preparation methods typically involve direct control of ions or atoms, which often depends on specific lattice-matched substrates for epitaxial growth and other stringent conditions that limit the mild preparation and flexibility of device integration. Herein, we present the on-substrate fabrication of CsPbBr single-crystal microstructures obtained via a nanoparticle self-assembly assisted low-temperature sintering (NSALS) method.

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Construction of a BiVO/V-MoS S-scheme heterojunction for efficient photocatalytic nitrogen fixation.

Nanoscale Adv

March 2024

MOE International Joint Laboratory of Materials Microstructure, Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology Tianjin 300384 China

Photocatalytic nitrogen (N) reduction to ammonia (NH), adopting HO as the electron source, suffers from low efficiency owing to the sluggish kinetics of N reduction and the requirement of a substantial thermodynamic driving force. Herein, we present a straightforward approach for the construction of an S-scheme heterojunction of BiVO/V-MoS to successfully achieve photocatalytic N fixation, which is manufactured by coupling an N-activation component (V-MoS nanosheet) and water-oxidation module (BiVO nanocrystal) through electrostatic self-assembly. The V-MoS nanosheet, enriched with sulfur vacancies, plays a pivotal role in facilitating N adsorption and activation.

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Article Synopsis
  • Recent trends in underwater target recognition involve deep learning models, typically using either 1D or 2D approaches for time-domain signals and time-frequency spectra.
  • This paper introduces a new temporal 2D modeling method that combines 1D and 2D techniques for classifying ship radiation noise, leveraging periodic characteristics of time-domain signals to enhance long-term correlation insights.
  • The study shows that this hybrid method improves model accuracy by 0.9% and reduces parameter count by 30%, while also comparing the effectiveness of models trained on time-domain signals versus time-frequency representations, noting that time-domain models are more sensitive and space-efficient.
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[Research and Application Progress of Biochar in Amelioration of Saline-Alkali Soil].

Huan Jing Ke Xue

February 2024

College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

Saline-alkali land, as one of the farmland problems that seriously threatens grain yield in the 21st century, is widely distributed and has great potential for development. Biochar is a relatively efficient novel soil amendment, which can play an important role in alleviating the soil acid-base barrier, soil pollution control, carbon sequestration, and fertilizer slow release and has a great prospect in promoting sustainable agricultural development. In recent years, the research and application of biochar to improve saline-alkali soil have attracted much attention.

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[Photochemical Mechanism and Control Strategy Optimization for Summertime Ozone Pollution in Yining City].

Huan Jing Ke Xue

February 2024

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

To explore the formation mechanism of the ozone (O) and emission reduction strategy in a northwestern city, an extensive field campaign was conducted in summertime in 2021 in Yining City, in which the 0-D box model incorporating the latest explicit chemical mechanism (MCMv3.3.1) was applied for the first time to quantify the O-NO-VOCs sensitivity and formulate a precise O control strategy in this city.

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Introduction: Grapes are prone to various diseases throughout their growth cycle, and the failure to promptly control these diseases can result in reduced production and even complete crop failure. Therefore, effective disease control is essential for maximizing grape yield. Accurate disease identification plays a crucial role in this process.

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Renal replacement therapy (RRT) is a crucial treatment for sepsis-associated acute kidney injury (S-AKI), but it is uncertain which S-AKI patients should receive immediate RRT. Identifying the characteristics of patients who may benefit the most from RRT is an important task. This retrospective study utilized a public database and enrolled S-AKI patients, who were divided into RRT and non-RRT groups.

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The boom-type roadheader plays a crucial role in coal mining. However, conducting the real-time monitoring of the mechanical performance and comprehensive adaptive cutting in the dynamic cutting process are challenging. To address these issues, a digital twin system that integrates the elements of "shape, performance, and control" for roadheaders is presented in this paper.

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Research on workflow recognition for liver rupture repair surgery.

Math Biosci Eng

January 2024

Medical Support Technology Research Department, Systems Engineering Institute, Academy of Military Sciences, People's Liberation Army, Tianjin 300161, China.

Liver rupture repair surgery serves as one tool to treat liver rupture, especially beneficial for cases of mild liver rupture hemorrhage. Liver rupture can catalyze critical conditions such as hemorrhage and shock. Surgical workflow recognition in liver rupture repair surgery videos presents a significant task aimed at reducing surgical mistakes and enhancing the quality of surgeries conducted by surgeons.

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Novel near-infrared BODIPY-cyclodextrin complexes for photodynamic therapy.

Heliyon

March 2024

School of Chemical Engineering and Technology, Institute of Molecular Plus, Tianjin University, Tianjin, China.

To meet the requirements of diagnosis and treatment, photodynamic therapy (PDT) is a promising cancer treatment with less side-effect. A series of novel BODIPY complexes (BODIPY-CDs) served as PDT agents were first reported to enhance the biocompatibility and water solubility of BODIPY matrix through the click reaction of alkynyl-containing BODIPY and azide-modified cyclodextrin (CD). BODIPY-CDs possessed superior water solubility due to the introduction of CD and their fluorescence emission apparently redshifted (>90 nm) on account of triazole units as the linkers compared to alkynyl-containing BODIPY.

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Pb[OPb](SiO)X (X = Cl, Br): The First Pb-Containing Halogen Silicates with Mirror-Symmetric Pseudo-Aurivillius Bilayers.

Inorg Chem

March 2024

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

Two new congruently melting Pb-containing halogen silicates, Pb[OPb](SiO)X (X = Cl, Br), have been synthesized using a high-temperature solution method. Their crystal structures were determined by single-crystal X-ray diffraction, and both compounds crystallize in the orthorhombic space group . In both structures, the mirror-symmetric bilayer composed of Pb-O polyhedra is observed for the first time in Pb-containing silicates and belongs to α-PbO derivatives and is related to the Aurivillius phase.

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Dynamic chloride ion adsorption on single iridium atom boosts seawater oxidation catalysis.

Nat Commun

March 2024

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China.

Seawater electrolysis offers a renewable, scalable, and economic means for green hydrogen production. However, anode corrosion by Cl pose great challenges for its commercialization. Herein, different from conventional catalysts designed to repel Cl adsorption, we develop an atomic Ir catalyst on cobalt iron layered double hydroxide (Ir/CoFe-LDH) to tailor Cl adsorption and modulate the electronic structure of the Ir active center, thereby establishing a unique Ir-OH/Cl coordination for alkaline seawater electrolysis.

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Activation of peroxydisulfate via BiCoFe-layered double hydroxide for effective degradation of aniline.

Environ Sci Pollut Res Int

April 2024

College of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China.

The sulfate radical-based advanced oxidation processes (SR-AOPs) is a promising method for the degradation of pollutants, with the development of highly efficient catalysts for persulfate activation has been widely concerned. The novel BiCoFe-LDH (BCF-x) was synthesized successfully by coprecipitation method, which can activate peroxydisulfate (PDS) efficiently to degrade aniline. Comparative analysis with pure CoFe-LDH revealed a remarkable increase in reaction rate constant by approximately 14.

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In the traditional fresh supply chain, farmers commonly conceal the true quality information of their products in order to achieve better sales. This article focuses on the use of blockchain technology to address the issue of false freshness reporting in a two-level fresh supply chain consisting of a rural cooperative and a supermarket. Taking into account the dual losses of quality and quantity in the process of agricultural products transportation, the impacts of the product freshness and the blockchain investment level on random market demand are quantified in this paper.

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2D Conjugated Metal-Organic Frameworks: Defined Synthesis and Tailor-Made Functions.

Acc Chem Res

April 2024

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.

Conspectus2D conjugated metal-organic frameworks (2D -MOFs) have emerged as a class of graphene-like materials with fully π-conjugated aromatic structures. Their unique structural characteristics provide abundant physiochemical features, including regular nanochannels, high electrical conductivity, and customizable band gaps. Recent intensive research has significantly advanced this field, yet the exploration of 2D -MOFs with enhanced features is limited by the availability of organic linkages and topologies.

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Large-Area Conductive MOF Ultrathin Film Controllably Integrating Dinuclear-Metal Sites and Photosensitizers to Boost Photocatalytic CO Reduction with HO as an Electron Donor.

J Am Chem Soc

March 2024

Department of Chemistry, School of Science & Key Laboratory of Organic Integrated Circuits, Ministry of Education, Tianjin University, Tianjin 300072, China.

Article Synopsis
  • cMOF ultrathin films, known for their electrical conductivity and periodic porosity, enhance photocatalysis by promoting the separation of charge carriers and improving mass transfer of reactants.
  • A new method was developed to integrate dinuclear-metal molecular catalysts and perovskite quantum dot photosensitizers into these films, creating an effective photocatalyst called [DMC@cMOF]-PVK.
  • This hybrid structure achieved a significant increase in carbon monoxide yield during photocatalytic CO reduction, demonstrating the potential of multilayer films to outperform traditional powder catalysts by a factor of eight.
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Directed Electron Delivery from a Pb-Free Halide Perovskite to a Co(II) Molecular Catalyst Boosts CO Photoreduction Coupled with Water Oxidation.

Angew Chem Int Ed Engl

May 2024

MOE International Joint Laboratory of Materials Microstructure, Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, 300384, Tianjin, China.

Article Synopsis
  • The study focuses on creating efficient photocatalytic systems for reducing CO, aiming to minimize the use of toxic materials and reagents.
  • Researchers embedded cobalt phthalocyanine catalysts onto Pb-free halide perovskite nanosheets, achieving the highest photocatalytic performance with a special design using carboxyl anchors.
  • The results showed a significant increase in CO conversion rates compared to unmodified materials, and detailed analysis highlighted effective electron transfer from the Bi atoms in the perovskite to the cobalt catalysts, enhancing the overall photocatalytic process.
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Zero-dimensional (0D) lead-free halide perovskites have lately received significant interest owing to their captivating broadband emissions. An in-depth understanding of the luminescence mechanism of self-trapped excitons (STEs) and realization of effective regulation of luminescence properties have become a major challenge in the research of lead-free metal halides. Herein, we have synthesized the CsZnCl and Sb-doped CsZnCl crystals and conducted a comprehensive investigation into their distinct electronic structures and optical characteristics.

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Hybrid Dynamic Covalent Network-Based Protecting Layer for Stable Li-Metal Batteries.

ACS Appl Mater Interfaces

March 2024

State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

Metallic lithium (Li) is considered as the "Holy Grail" anode material for next-generation energy storage systems due to its extremely high theoretical capacity and low electrochemical potential. Before the commercialization of the Li electrode, dendritic Li growth and the unstable solid electrolyte interphase layer should be conquered. Herein, a hybrid covalent adaptable polymer network (HCAPN) is prepared via the random copolymerization of poly(ethylene glycol) methyl ether methacrylate and -acetoacetoxyethyl methacrylate, followed by chemical cross-linking with polyethylenimine (PEI) and amine-modified silicon dioxide (SiO).

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Triisocyanate Derived Interlayer and High-Melting-Point Doping Promoter Boost Operational Stability of Perovskite Solar Cells.

Angew Chem Int Ed Engl

April 2024

State Key Laboratory of Silicon and Advanced Semiconductor Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310058, China.

Formamidinium lead triiodide serves as the optimal light-absorbing layer in single-junction perovskite solar cells. However, achieving operational stability of high-efficiency n-i-p type devices at elevated temperatures remains challenging. In this work, we implemented effective surface modifications on microcrystalline perovskite films.

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Self-powered SnS/TiO photodetectors (PDs) with dual-band binary response and the applications in imaging and light-encrypted logic gates.

J Colloid Interface Sci

June 2024

School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384, China.

Article Synopsis
  • This research presents a new design for self-powered photodetectors (PDs) using a combination of SnS nanoflakes and rutile TiO nanorod arrays, creating a II-type heterostructure.
  • The device exhibits a unique response to different light wavelengths, generating a positive photocurrent under 385 nm (blocking lower wavelengths) and a negative photocurrent under 410 nm, showcasing its bipolar response.
  • This innovation enables dual-band imaging without external filters and implementation of various logical operations (OR, AND, NOT), which could enhance applications like visual systems and secure communications by reducing energy consumption and simplifying design.
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Electric field effects on neuronal input-output relationship by regulating NMDA spikes.

Cogn Neurodyn

February 2024

Tianjin Key Laboratory of Process Measurement and Control, School of Electrical and Information Engineering, Tianjin University, Tianjin, China.

Unlabelled: Evidence shows that the dendritic polarization induced by weak electrical field (EF) can affect the neuronal input-output function via modulating dendritic integration of AMPA synapses, indicating that the supralinear dendritic integration of NMDA synapses can also be influenced by dendritic polarization. However, it remains unknown how dendritic polarization affects NMDA-type dendritic integration, and then contributes to neuronal input-output relationship. Here, we used a computational model of pyramidal neuron with inhomogeneous extracellular potentials to characterize the relationship among EF, dendritic integration, and somatic output.

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