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95 result(s) for "Lv, Huijun"
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Facile Synthesis of P-Doped ZnIn2S4 with Enhanced Visible-Light-Driven Photocatalytic Hydrogen Production
ZnIn2S4 (ZIS) is widely used in the field of photocatalytic hydrogen production due to its unique photoelectric properties. Nonetheless, the photocatalytic performance of ZIS usually faces problems of poor conductivity and rapid recombination of charge carriers. Heteroatom doping is often regarded as one of the effective strategies for improving the catalytic activity of photocatalysts. Herein, phosphorus (P)-doped ZIS was prepared by hydrothermal method, whose photocatalytic hydrogen production performance and energy band structure were fully studied. The band gap of P-doped ZIS is about 2.51 eV, which is slightly smaller than that of pure ZIS. Moreover, due to the upward shift of its energy band, the reduction ability of P-doped ZIS is enhanced, and P-doped ZIS also exhibits stronger catalytic activity than pure ZIS. The optimized P-doped ZIS exhibits a hydrogen production rate of 1566.6 μmol g−1 h−1, which is 3.8 times that of the pristine ZIS (411.1 μmol g−1 h−1). This work provides a broad platform for the design and synthesis of phosphorus-doped sulfide-based photocatalysts for hydrogen evolution.
Construction of Electrostatic Self-Assembled 2D/2D CdIn2S4/g-C3N4 Heterojunctions for Efficient Visible-Light-Responsive Molecular Oxygen Activation
Molecular oxygen activated by visible light to generate radicals with high oxidation ability exhibits great potential in environmental remediation The efficacy of molecular oxygen activation mainly depends on the separation and migration efficiency of the photoinduced charge carriers. In this work, 2D/2D CdIn2S4/g-C3N4 heterojunctions with different weight ratios were successfully fabricated by a simple electrostatic self-assembled route. The optimized sample with a weight ratio of 5:2 between CdIn2S4 and g-C3N4 showed the highest photocatalytic activity for tetracycline hydrochloride (TCH) degradation, which also displayed good photostability. The enhancement of the photocatalytic performance could be ascribed to the 2D/2D heterostructure; this unique 2D/2D structure could promote the separation and migration of the photoinduced charge carriers, which was beneficial for molecular oxygen activation, leading to an enhancement in photocatalytic activity. This work may possibly provide a scalable way for molecular oxygen activation in photocatalysis.
Average amplitudes analysis for a phenomenological model under hydrodynamic interactions with periodic perturbation and multiplicative trichotomous noise
From a statistical mechanics perspective, to describe the dynamics of a tracer, a phenomenological model has been established by a generalized Langevin equation (GLE) which includes a Basset force, a periodic perturbation force, a Stokes force, an external force and a thermal noise. Using the generalized Shapiro-Loginov formula, the iterative expressions of the first moments of the system are obtained. The time series of the first moments have been extensively investigated. By analyzing the time series of the first moments of the system with different system parameters, the irregular responses of the curves are revealed and tend to be stable for a long time. Significantly, the dynamics of average amplitudes of the first moments, influenced by various system parameters, have also been addressed in detail. Especially, the monotonic and non-monotonic properties of the average amplitudes of the first moments versus the memory exponent α are discussed.
The Field off Communication Between Chinese and Japanese Literati and the Literary Relationship During the Period of Shanghai's Occupation - Centered Around Colleagues in The Shanghai Literature
This paper takes the colleagues of The Shanghai Literature, the only Japanese literature magazine in Shanghai during the Japanese occupation period in the first half of the 1940s, as the main research object. Through the investigation of first-hand materials in Chinese and Japanese, taking the Japanese newspapers, cultural groups and Chinese newspapers in the Japanese occupied areas in Shanghai at the same time as the two main axes, this paper combs the various complicated relationships around Shanghai Literature, re-examines the speech space constructed between Chinese and Japanese people and Chinese and Japanese newspapers and media in the late period of the Anti-Japanese War, and restores the special period of Japanese occupation of Shanghai. The little-known scene of modern Chinese and Japanese cultural exchange in the special context dominated by national policy literature reveals the seemingly lively but deformed literary exchange field between Chinese and Japanese literati and the heterogeneous relatio
The Spread and Variation of Japanese National Policy Literature abroad - Focused on The Shanghai Literature, A Japanese Magazine in the Period of the Occupation
The Shanghai Literature, a Japanese magazine born during the Japanese occupation of Shanghai, is fundamentally the product of Japanese national policy literature and a part of Japan's so-called \"cultural work\" overseas during the wartime. Its main theme is the advocacy of the \"Greater East Asian War.\" However, different from the national policy literature in Japan, it has the local color of Shanghai and the participation of some Chinese literati. Uchiyama Kanzo is one of the core of this literary magazine, so in addition to the so-called theme, his works show a variety of heterochromatic and even diversified tendencies. The Shanghai Literature, published in five issues, is an important Japanese literature for the study of Japan's overseas national policy literature during this period, the Japanese literary world in Shanghai during the occupation period, and the variation of Sino-Japanese literary relations. The contribution of this paper is that for the annihilation of Japanese magazine, combing its literatur
Lattice Strain and Piezoelectric Field Modulated Piezo‐Photocatalytic Nitrate‐to‐Ammonia Conversion in Chemically Bonded S‐Scheme Heterojunction
Piezo‐photocatalysis provides an efficient approach to harness mechanical and solar energy simultaneously for chemical conversion. However, prior studies predominantly focus on piezoelectric fields, while ignoring the influence of lattice strain induced by mechanical stimulations in the piezo‐photocatalytic process. Herein, a ZnO@ZnSe S‐scheme heterojunction is constructed by in situ growth of an ultrathin ZnSe shell on piezoelectric ZnO nanorods for piezo‐photocatalytic nitrate‐to‐ammonia. Such a piezo‐photoelectric heterojunction is designed to exploit the lattice strain and piezoelectric effect in parallel. Under ultrasound irradiation, the coherent lattice strain induced by O─Zn─Se interfacial chemical bonds regulates the active‐site Zn and Se atoms in the ZnSe shell, accelerating the dissociation of H 2 O molecules at Zn atoms and optimizing the thermodynamic process of nitrate‐to‐ammonia at Se atoms. Meanwhile, the piezoelectric field in ZnO modulates the band structure of ZnO@ZnSe heterojunction, enabling sustained charge carrier separation. Benefiting from the synergistic effects, the ZnO@ZnSe catalyst achieved an ammonia yield of 2.88 mmol g −1 h −1 and a high selectivity of 92.86% in the piezo‐photocatalytic nitrate‐to‐ammonia process. This work reveals, for the first time, the synergy between the piezoelectric field and lattice strain in piezo‐photocatalysis, paving the way for designing advanced catalytic systems based on a novel principle.
Facile Synthesis of P-Doped ZnIn 2 S 4 with Enhanced Visible-Light-Driven Photocatalytic Hydrogen Production
ZnIn S (ZIS) is widely used in the field of photocatalytic hydrogen production due to its unique photoelectric properties. Nonetheless, the photocatalytic performance of ZIS usually faces problems of poor conductivity and rapid recombination of charge carriers. Heteroatom doping is often regarded as one of the effective strategies for improving the catalytic activity of photocatalysts. Herein, phosphorus (P)-doped ZIS was prepared by hydrothermal method, whose photocatalytic hydrogen production performance and energy band structure were fully studied. The band gap of P-doped ZIS is about 2.51 eV, which is slightly smaller than that of pure ZIS. Moreover, due to the upward shift of its energy band, the reduction ability of P-doped ZIS is enhanced, and P-doped ZIS also exhibits stronger catalytic activity than pure ZIS. The optimized P-doped ZIS exhibits a hydrogen production rate of 1566.6 μmol g h , which is 3.8 times that of the pristine ZIS (411.1 μmol g h ). This work provides a broad platform for the design and synthesis of phosphorus-doped sulfide-based photocatalysts for hydrogen evolution.
Weight loss efficiency and safety of tirzepatide: A Systematic review
Tirzeptide is a novel glucagon-like peptide-1 receptor (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) drug, which shows good efficiency for weight loss. Therefore, we aim to investigate the efficacy and safety of tirzepatide for weight loss in type 2 diabetes mellitus (T2DM) and obesity patients in this meta-analysis study. Cochrane Library, PubMed, Embase, Clinical Trials, and Web of Science were searched from inception to October 5, 2022. All randomized controlled trials (RCTs) were included. The odds ratio (OR) was calculated using fixed-effects or random-effects models by Review Manager 5.3 software. In total, ten studies (12 reports) involving 9,873 patients were identified. A significant loss body weight in the tirzepatide group versus the placebo by -9.81 kg (95% CI (-12.09, -7.52), GLP-1 RAs by -1.05 kg (95% CI (-1.48, -0.63), and insulin by -1.93 kg (95% CI (-2.81, -1.05), respectively. In sub-analysis, the body weight of patients was significantly reduced in three tirzepatide doses (5 mg, 10 mg, and 15 mg) when compared with those of the placebo/GLP-1 RA/insulin. In terms of safety, the incidence of any adverse events and adverse events leading to study drug discontinuation was higher in the tirzepatide group, but the incidence of serious adverse events and hypoglycaemia was lower. Additionally, the gastrointestinal adverse events (including diarrhea, nausea, vomiting and decreased appetite) of tirzepatide were higher than those of placebo/basal insulin, but similar to GLP-1 RAs. In conclusion, tirzeptide can significantly reduce the weight of T2DM and patient with obesity, and it is a potential therapeutic regimen for weight-loss, but we need to be vigilant about its gastrointestinal reaction.
The association between blood urea nitrogen to albumin ratio and 28-day ICU mortality in sepsis patients: a retrospective cohort study
Background Sepsis remains a leading cause of mortality in intensive care unit (ICU) patients, with mortality rates up to 30%. While the Blood Urea Nitrogen (BUN) to Albumin ratio has been associated with outcomes in various conditions, the dose–response relationship between this ratio and mortality in sepsis patients remains unclear. Methods This retrospective cohort study analyzed 9,783 sepsis patients from the eICU Collaborative Research Database. The relationship between BUN/Albumin ratio and 28-day ICU mortality was examined using multivariate logistic regression and threshold effect analysis. Models were adjusted for demographics, clinical parameters, comorbidities, and laboratory values. Threshold effect analysis was performed using two-piecewise linear regression. Results A non-linear relationship was identified between the BUN/Albumin ratio and 28-day ICU mortality, with a threshold at 20.91 mg/g (95% CI 17.19–26.90). Below this threshold, each unit difference in the ratio was associated with higher mortality odds (OR: 1.06, 95% CI 1.04–1.08, P  < 0.0001). Above the threshold, the association persisted but is markedly attenuated (OR: 1.01, 95% CI 1.00–1.02). This relationship remained robust after adjusting for potential confounders and in sensitivity analyses. Conclusions A nonlinear association was observed between the BUN/Albumin ratio and 28-day ICU mortality among patients with sepsis, with an inflection point established at 20.91 mg/g. This readily accessible parameter has the potential to aid in early risk stratification within the ICU setting. Additional research is warranted to validate these findings.