Strategy of constructing D-A structure and accurate active sites over graphitic carbon nitride nanowires for high efficient photocatalytic nitrogen fixation.

Constructing photocatalysts for the stable and efficient production of NH is of excellent research significance and challenging. In this paper, the electron acceptor 5-amino-1,10-phenanthroline (AP) is introduced into the electron-donor graphitic carbon nitride (CN) framework by a simple heated copolymerization method to construct a donor-acceptor (D-A) structure. Subsequently, the phenanthroline unit is coordinated with transition metal Fe ions to obtain the photocatalyst Fe(III)-0.

Prognostic predictive value of Ki-67 in stage I-II triple-negative breast cancer.

Our research aimed to determine an optimal cutoff value and investigate the prognostic predictive function of Ki-67. We retrospectively enrolled 1146 patients diagnosed with stage I-II triple-negative breast cancer. Disease-free and overall survival were analyzed using the Kaplan-Meier method and the Cox regression model.

Construction of Fe(III) Active Sites on Phenanthroline-Grafted g-CN: Reduced Work Function and Enhanced Intramolecular Charge Transfer for Efficient N Photofixation.

Photocatalytic nitrogen fixation is one of the important pathways for green and sustainable ammonia synthesis, but the extremely high bonding energy of the N≡N triple bond makes it difficult for conventional nitrogen fixation photocatalysts to directly activate and hydrogenate. Given this, we covalently grafted the phenanthroline unit onto graphitic carbon nitride nanosheets (CN) by the simple thermal oxidation method and complexed it with transition metal Fe ions to obtain stable dispersed Fe active sites, which can significantly improve the photocatalytic activity. The Fe(III)-4-P-CN photocatalyst morphology consists of porous lamellar structures internally connected by nanowires.

g-CN@TiO photoanodes for high-efficiency QDSSCs: improved electron transfer and photochemical stability.

In QDSSCs, a photoanode is an important part of connecting the external circuit, providing support for the transmission of photogenerated carriers to the external circuit, and also providing an attachment site for QDs. In this study, we prepared a g-CN@TiO composite for the photoanode by a two-step process. The results show that the use of g-CN@TiO greatly increases the specific surface area of the material, effectively inhibits the "electron-hole" recombination, and optimizes the stability and catalytic performance of the photoanode.

Core-shell ZnO@TiO hexagonal prism heterogeneous structures as photoanodes for boosting the efficiency of quantum dot sensitized solar cells.

In quantum dot sensitized solar cells (QDSSCs), the photoanode provides a stable support for the quantum dots, and promotes the production of photogenerated electrons and the transfer to external circuit. Therefore, it is very important to search for excellent photoanodes for the commercial application of QDSSCs. In this paper, a core-shell ZnO@TiO hexagonal prism heterogeneous structure was prepared by a two-step hydrothermal method.

Simulating arsenic discharge flux at a relic smelting site in Guangxi Zhuang Autonomous Region, China.

Anthropogenic groundwater arsenic (As) pollution is common in many aquifers in Southwest China. It is concerned that long-term random disposal of As smelting slag could induce the transport of high-As groundwater into previously uncontaminated aquifers. Here, we used HELP-MODFLOW-MT3DMS model simulations to integrate the percolation, groundwater flow, and solute transport processes at an aquifer at site scale, constrained by weather, hydrogeology, and monitoring data.

Treatments and Prognosis of the Breast Ductal Carcinoma In Situ.

Introduction: With progress in treatments, breast ductal carcinoma in situ (DCIS) outcomes have substantially improved. However, as various treatment methods are used in different countries and institutions, consensus on the optimal treatment method is lacking. This study aimed to analyze the prognostic factors and provide a reference for optimizing the clinical treatment of DCIS.

Fabrication of Ultrafine Cu O Nanoparticles on W O Ultra-Thin Nanowires by In-Situ Reduction for Highly Efficient Photocatalytic Nitrogen Fixation.

Photocatalytic ammonia synthesis technology is one of the important methods to achieve green ammonia synthesis. Herein, two samples of Cu ion-doped W O with different morphologies, ultra-thin nanowires (Cu-W O -x UTNW) and sea urchin-like microspheres (Cu-W O -x SUMS), are synthesized by a simple solvothermal method. Subsequently, Cu O-W O -x UTNW/SUMS is synthesized by in situ reduction, where the NH production rate of Cu O-W O -30 UTNW is 252.

Limitation of WO in Zn-CoO Nanopolyhedra by the Pyrolysis of HPWO@BMZIF: Synergistic Effect of Heterostructure and Oxygen Vacancies for Enhanced Nitrogen Fixation.

The photocatalytic nitrogen fixation process is a crucial step toward carbon neutrality and sustainable development. The combination of polyoxometalates and metal-organic frameworks is a viable method to achieve high-efficiency photocatalytic nitrogen fixation. In this work, we employed bimetallic ZIF (BMZIF) composed of Co and Zn encapsulated with HPWO (PW) as the precursor to synthesize Zn-doped CoO nanopolyhedra loaded with WO nanoparticles.

Construction of an Endogenously Activated Signal Amplification Assay for In Situ Imaging of MicroRNA and Guided Precise Photodynamic Therapy for Cancer Cells.

The construction of a sensitive strategy for in situ visualizing and dynamic tracing intracellular microRNA is of great importance. Via the toehold-mediated strand displacement process, the catalytic hairpin assembly (CHA) could offer several hundreds-fold signal amplifications. However, the CHA may produce certain background interferences since microRNA may exist in normal cells.

Linking health to geology-a new assessment and zoning model based on the frame of medical geology.

With the growing concerns about the Earth's environment and human health, there has been a surge in research focused on the intersection of health and geology. This study quantitatively assesses the relationship between human health and geological factors using a new framework. The framework considers four key geological environment indicators related to health: soil, water, geological landform, and atmosphere.

Understanding the consumers' multi-competing brand community engagement: A mix method approach.

Introduction: Participating in multiple competing brand communities simultaneously is common for consumers, which brings challenges for companies to manage brand communities and build strong brand-consumer relationships. Although previous studies have widely examined the drivers and outcomes of consumers' engagement in an individual community, little is known about the multi-competing brand community engagement.

Methods: This paper explores the manifestation, categories, motivational drivers, and consequences of consumers' MBCE through two studies using two different methodologies to fill this gap.

Construction of CoO nanopolyhedra with rich oxygen vacancies from ZIF-67 for efficient photocatalytic nitrogen fixation.

Photocatalytic nitrogen fixation has attracted much attention due to the fact that it is a way of using solar energy to achieve clean and sustainable conversion of nitrogen to ammonia under mild conditions. In this paper, different proportions of Zn-doped CoO nanopolyhedrons were synthesized using bimetallic ZIFs containing Co and Zn as precursors for the construction of photocatalytic nitrogen fixation semiconductor materials for the first time. The synthesized CoO nano-polyhedron still retains the rhombic dodecahedron shape of ZIF-67 and exhibits a large specific surface area.

Upconversion nanoparticle-based optogenetic nanosystem for photodynamic therapy and cascade gene therapy.

Most photosensitizer molecules used for the photodynamic therapy (PDT) are chemically-synthesized organic photosensitizer dyes which show several limitations such as unsatisfactory cell uptake, weak selectivity and off-target phototoxicity. Recently, genetically-encoded photosensitizers have attracted increasing attentions which provide the targeted cell elimination with single-cell precision. However, their applications are mainly limited by the shallow tissue penetration depth of the excitation light and the low cell apoptosis ratio.

Acoustic-Based Theranostic Probes Activated by Tumor Microenvironment for Accurate Tumor Diagnosis and Assisted Tumor Therapy.

Acoustic-based imaging techniques, including ultrasonography and photoacoustic imaging, are powerful noninvasive approaches for tumor imaging owing to sound transmission facilitation, deep tissue penetration, and high spatiotemporal resolution. Usually, imaging modes were classified into "always-on" mode and "activatable" mode. Conventional "always-on" acoustic-based probes often have difficulty distinguishing lesion regions of interest from surrounding healthy tissues due to poor target-to-background signal ratios.

Fabrication of nanocomposite MoC-MoC@C/CdZnS: promoted electron migration and improved photocatalytic hydrogen evolution.

In this work, we successfully prepared composites of carbon-modified in-phase MoC-MoC (MoC-MoC@C, MMC) nanosheets with CdZnS (ZCS) nanorods. The loading of MMC nanosheets significantly improved the hydrogen production rate of ZCS nanorods. The results showed that the photocatalytic hydrogen production rate of ZCS is the highest when MMC nanosheets are 1 wt% of ZCS nanorods (1-MMC/ZCS), reaching 68.

Leaching experiments and risk assessment to explore the migration and risk of potentially toxic elements in soil from black shale.

Black shale is rich in potentially toxic elements (PTEs) that migrate through rock weathering or rainfall, adversely affecting human health and the environment. In this study, simulated rainfall leaching experiments were used to investigate the migration patterns and leaching kinetics of PTEs in black shale from the Lower Cambrian Hetang Formation and to analyze the water quality index (WQI) of PTEs in the leachate. A comparison between the risk of PTEs in the leachate and those in the soil was also made to determine the risk sources, risk status, and distribution characteristics of PTEs in the study area.

Induced neural stem cells from Macaca fascicularis show potential of dopaminergic neuron specification and efficacy in a mouse Parkinson's disease model.

Induced neural stem cells (iNSCs) can be reprogrammed from somatic cells and have shown potentials in treatment of various neurological diseases/disorders. Obtaining iNSCs of nonhuman primates serves as an important bridge for clinical translation using iNSCs. In the current study, cynomolgus (Macaca fascicularis) bone marrow mesenchymal stromal cells (MSCs) were reprogrammed into iNSCs by transduction of non-integrative Sendai virus encoding transgenes OCT4, SOX2, KLF4 and C-MYC.

Analysis of phosphorus and sulfur effect on soil selenium bioavailability based on diffusive gradients in thin films technique and sequential extraction.

Human intake of selenium (Se) mainly occurs through the food chain, and is largely dependent on the bioavailability of soil Se. Sulfur (S) and phosphorus (P) also as essential nutrients for plants, their antagonistic with Se effects on Se bioavailability should be considered. We conducted pot experiments to investigate the interaction effect on the bioavailability of Se in the soil using a sequential extraction method and diffusive gradients in thin films (DGT).

Decomposition-Reassembly Synthesis of a Silverton-Type Polyoxometalate 3D Framework: Semiconducting Properties and Photocatalytic Applications.

Polyoxometalate-based all-inorganic three-dimensional (3D) frameworks have recently attracted attention as a unique class of materials due to their unique physicochemical properties and a wide field of application with excellent prospects. We herein synthesized a novel all-inorganic 3D framework material based on cobalt-substituted Silverton-type polyoxometalate, H{CoWO[Co(HO)]}·2HO (CoW), which was successfully constructed using Na[WCo(HO)(CoWO)]·46-48HO (CoW) and Co(NO)·6HO as starting materials in a hydrothermal reaction via a decomposition-reassembly route together with the rational adjustment of pH values. CoW has been structurally characterized using single-crystal X-ray diffraction.

High-efficiency counter electrodes for quantum dot-sensitized solar cells (QDSSCs): designing graphene-supported CuCoO porous hollow microspheres with improved electron transport performance.

Owing to it being low-cost and eco-friendly and having multiple oxidation states, the ternary transition metal oxide CuCoO has been used as an electrode material with superior electrocatalytic activity in numerous fields. However, its application in quantum dot-sensitized solar cells (QDSSCs) has not been investigated. Herein, we synthesized porous hollow micro-spherical CuCoO nanomaterials by simple solvothermal and calcination processes and then applied them in QDSSCs as counter electrodes (CEs).