supplementary_file – Supplemental material for Bullying Victimization, Coping Strategies, and Depression of Children of China

Supplemental material, supplementary_file for Bullying Victimization, Coping Strategies, and Depression of Children of China by Shenghua Xie, Junling Xu and Yunjiao Gao in Journal of Interpersonal Violence</p

Anodization of Pd in H₂SO₄ Solutions: Influence of Potential, Polarization Time, and Electrolyte Concentration

The anodization of Pd in H2SO4 solutions has been investigated by electrochemical measurements, considering the effect of the applied potential, polarization time, and electrolyte concentration. The anodization and subsequent reduction result in the formation of Pd nanostructures on the electrode surface. Compared to the bulk Pd, the anodization of Pd in H2SO4 solutions leads to different cyclic voltammetry (CV) behaviors including well-separated adsorption/desorption peaks in the hydrogen region and relatively larger reduction peak areas. The improvement of electrochemically active surface areas (EASAs) of the anodized Pd samples is strongly dependent upon the electrolyte concentration, and the optimum H2SO4 concentration is 1.0 M. Both the applied potential and polarization time have a significant influence on the anodization process of Pd. For the given electrolyte concentration, there exist desirable applied potential and polarization time to achieve greater EASAs. The EASAs of the anodized Pd obtained under the optimum polarization conditions can reach as large as 890 times compared to its geometric area. In addition, the formation mechanism of Pd nanostructures on the electrode surface has been discussed on the basis of microstructural analysis. The present findings provide a promising route to fabricate nanostructured Pd electrocatalysts with ultrahigh EASAs

Multielement-Doped Fe_<i>x</i>Se_<i>y</i>/Carbon Nanotube Composites for High Performance Sodium-Ion Storage

FexSey-based composites have become very attractive anode materials for sodium-ion batteries due to their excellent electrochemical reversibility and the low price of iron resources. However, the unsatisfactory rate capacities and cycling stabilities continue to stimulate modification studies on synthetic strategies, crystal structure, morphologies, and composition structures. Here, we presented a straightforward synthetic route to a series of multielement-doped FexSey/carbon nanotube (FexSey/CNT) composites containing different ion selenide phases (Fe3Se4, FeSe2, and FeSe) from a single priceless stainless-steel powder. Among them, Fe3Se4/CNT exhibits the best rate capability and cycling stability with micron-scale sizing (250.0 mAh g–1 at 50 A g–1 and 338.6 mAh g–1 after 1600 cycles at 10 A g–1). The excellent sodium-ion storage properties of the Fe3Se4/CNT electrode could be attributed to the small subgrain size, abundant crystal boundaries, and amorphous regions in the composite structures caused by high-content multielement doping. The performance differences among the as-prepared composites containing various iron selenides lie in their intrinsic crystal structure characteristics. The practical application prospects of the Fe3Se4/CNT electrodes are also proved. The full cell assembled with Fe3Se4/CNT and Na3V2(PO4)2F3/C displayed a high-rate capability of 368 mAh g–1 at 5 A g–1 and good capacity retention (about 100%) after 150 cycles

¹⁸F‑Radiolabeling and Evaluation of an AMD3465 Derivative for PET Imaging of CXCR4 in a Mouse Breast Tumor Model

The exploration of pharmaceutically active agents and positron emission tomography (PET) tracers targeting CXCR4 has been a focal point in cancer research given its pivotal role in the development and progression of various cancers. While significant strides have been made in PET imaging with radiometal-labeled tracers, the landscape of 18F-labeled small molecule tracers remains relatively limited. Herein, we introduce a novel and promising derivative, [18F]SFB-AMD3465, as a targeted PET tracer for CXCR4. The compound was synthesized by modifying the pyridine ring of AMD3465, which was subsequently labeled with 18F using [18F]SFB. The study provides comprehensive insights into the design, synthesis, and biological evaluation of [18F]SFB-AMD3465. In vitro and in vivo assessments demonstrated the CXCR4-dependent, specific, and sensitive uptake of [18F]SFB-AMD3465 in the CXCR4-overexpressing 4T1 cell line and the corresponding xenograft-bearing mouse model. These findings contribute to bridging the gap in 18F-labeled PET tracers for CXCR4 and underscore the potential of [18F]SFB-AMD3465 as a PET radiotracer for in vivo CXCR4 imaging

One-step Solid-State Synthesis of V_1.13Se₂/V₂O₃ Heterostructure as a High Pseudocapacitance Anode for Fast-Charging Sodium-Ion Batteries

Sodium-ion batteries (SIBs) offer several benefits, including cost-efficiency and fast-charging characteristics, positioning them as attractive substitutes for lithium-ion batteries in energy storage applications. However, the inferior capacity and cycling stability of electrodes in SIBs necessitate further enhancement due to sluggish reaction kinetics. In this respect, the utilization of heterostructures, which can provide an inherent electric field and abundant active sites on the surface, has emerged as a promising strategy for augmenting the cycling stability and rate features of the electrodes. This work delves into the utilization of V1.13Se2/V2O3 heterostructure materials as anodes, initially fabricated via a simplified one-step solid-state sintering technique. The high pseudocapacitance and low characteristic relaxation time constant give the V1.13Se2/V2O3 heterostructure impressive properties, such as a high capacity of 328.5 mAh g–1 even after 1500 cycles at a high current density of 2 A g–1 and rate capability of 278.9 mAh g–1 at 5 A g–1. Moreover, the assembled sodium-ion full battery delivers a capacity of 118.5 mAh g–1 after 1000 cycles at 1 A g–1. These findings provide novel insight and guidance for the rapid synthesis of heterojunction materials and the advancement of SIBs

Microwave-Assisted Hydrothermal Synthesis of Na₃V₂(PO₄)₂F₃ Nanocuboid@Reduced Graphene Oxide as an Ultrahigh-Rate and Superlong-Lifespan Cathode for Fast-Charging Sodium-Ion Batteries

Na3V2(PO4)2F3 (NVPF) has been regarded as a favorable cathode for sodium-ion batteries (SIBs) due to its high voltage and stable structure. However, the limited electronic conductivity restricts its rate performance. NVPF@reduced graphene oxide (rGO) was synthesized by a facile microwave-assisted hydrothermal approach with subsequent calcination to shorten the hydrothermal time. NVPF nanocuboids with sizes of 50–150 nm distributed on rGO can be obtained, delivering excellent electrochemical performance such as a longevity life (a high capacity retention of 85.6% after 7000 cycles at 10 C) and distinguished rate capability (116 mAh g–1 at 50 C with a short discharging/charging time of 1.2 min). The full battery with a Cu2Se anode represents a capacity of 116 mAh g–1 at 0.2 A g–1. The introduction of rGO can augment the electronic conductivity and advance the Na+ diffusion speed, boosting the cycling and rate capability. Besides, the small lattice change (3.3%) and high structural reversibility during the phase transition process between Na3V2(PO4)2F3 and NaV2(PO4)2F3 testified by in situ X-ray diffraction are also advantageous for Na storage behavior. This work furnishes a simple method to synthesize polyanionic cathodes with ultrahigh rate and ultralong lifespan for fast-charging SIBs

A Spontaneously Formed Plasmonic-MoTe2 Hybrid Platform for Ultrasensitive Raman Enhancement

To develop highly sensitive, stable and repeatable surface-enhanced Raman scattering (SERS) substrates is crucial for analytical detection, which is a challenge for traditional metallic structures. Herein, by taking advantage of the high surface activity of 1T' transition metal telluride, we have fabricated high-density gold nanoparticles (AuNPs) that are spontaneously in-situ prepared on the 1T' MoTe2 atomic layers via a facile method, forming a plasmonic-2D material hybrid SERS substrate. This AuNP formation is unique to the 1T' phase, which is repressed in 2H MoTe2 with less surface activity. The hybrid structure generates coupling effects of electromagnetic and chemical enhancements, as well as excellent molecule adsorption, leading to the ultrasensitive (4*10^-17 M) and reproducible detection. Additionally, the immense fluorescence and photobleaching phenomena are mostly avoided. Flexible SERS tapes have been demonstrated in practical applications. Our approach facilitates the ultrasensitive SERS detection by a facile method, as well as the better mechanistic understanding of SERS beyond plasmonic effects