5 results on '"Huitao Zhang"'
Search Results
2. Synthesis of MnO2 modified porous carbon spheres by preoxidation-assisted impregnation for catalytic oxidation of indoor formaldehyde
- Author
-
Changming Zhang, Caimei Fan, Huitao Zhang, Rui Li, Yaqi Wang, Xiaochao Zhang, and Song Wen
- Subjects
Materials science ,Scanning electron microscope ,Mechanical Engineering ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Catalysis ,Adsorption ,X-ray photoelectron spectroscopy ,Chemical engineering ,Catalytic oxidation ,Mechanics of Materials ,Desorption ,General Materials Science ,Fourier transform infrared spectroscopy ,Temperature-programmed reduction ,0210 nano-technology - Abstract
Resin-based porous carbon spheres with well dispersed MnO2 particles were sucessfully synthesised by steam activation and preoxidation-assisted impregnation of manganese nitrate salt. X-ray diffractometer (XRD), Fourier Transform Infrared spectroscopy (FT-IR), N2 adsorption–desorption, scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), H2 temperature programmed reduction (H2-TPR), O2 temperature-programmed desorption (O2-TPD) and in-situ diffuse reflectance fourier transform spectrometry (DRIFTS) were applied to characterize the obtained porous carbon spheres, and the HCHO adsorption and stability performances were evaluated in a fixed bed reactor. The results demonstrated that surface chemical properties and HCHO removal performances were significantly enhanced after the modification of preoxidation-assisted impregnation. The optimal manganese nitrate loading value, and relative humidity were 6 and 50%, respectively. Moreover, the higher HCHO concentration showed a smaller breakthrough time. The HCHO removal efficiency of ACS–O-6% Mn remained 100% even after reaction for 20 h at room temperature, while the average HCHO removal efficiency only declines by 0.2% compared with the first adsorption after 10 regeneration cycles. The in-situ DRIFTS results showed the smaller accumulation and faster desorption of intermediate products over the ACS–O-6% Mn. The HCHO removal mechanism analysis indicated that the enriched Mn3+ and surface active chemisorbed oxygen accounted for the excellent catalytic oxidation activity and stability.
- Published
- 2020
3. Silica/antibody-conjugated microcomb electrode sensor for cardiac biomarker analysis
- Author
-
Thangavel Lakshmipriya, Huitao Zhang, Yuan Seng Wu, Haitao Li, Jing Li, Xingzhou Zhao, Shujiang Song, Subash C. B. Gopinath, Zihan Xue, and Jinpeng Xu
- Subjects
010302 applied physics ,Detection limit ,medicine.medical_specialty ,biology ,Chemistry ,02 engineering and technology ,General Chemistry ,Gold standard (test) ,Conjugated system ,021001 nanoscience & nanotechnology ,medicine.disease ,01 natural sciences ,Silica nanoparticles ,Internal medicine ,0103 physical sciences ,medicine ,Cardiology ,biology.protein ,Interdigitated electrode ,General Materials Science ,Biomarker Analysis ,Myocardial infarction ,Antibody ,0210 nano-technology - Abstract
Myocardial infarction (MI), which is generally known as a heart attack, occurs when there is a lack of blood supply to the heart. Electrocardiogram (ECG) is commonly used for the initial screening of MI but is not sufficiently sensitive. With ECG, cardiac biomarkers help to efficiently assess MI. The cardiac troponin I level has a high correlation with MI and is one of the gold standard biomarkers to identify MI. This study focuses on detecting cardiac troponin I by its parent antibody on a microcomb interdigitated electrode (IDE) sensor. To improve the detection, silica nanoparticles (SiNps) were complexed with antibody and immobilized on the IDE sensing surface. Amine-modified SiNps help to hold more antibodies on the sensing surface and interact with more cardiac troponin I molecules, leading to sensitive detection with a limit of detection of 1 fM (24 pg/mL). Moreover, the control proteins were failed to specifically interact, indicating the genuine detection of cardiac troponin I. This study helps to more easily and efficiently quantify the cardiac troponin I level to diagnose MI.
- Published
- 2021
4. Smoking modify the effects of polycyclic aromatic hydrocarbons exposure on oxidative damage to DNA in coke oven workers
- Author
-
Hongjie Zhang, Wubin Wang, Yanfeng Fan, Huitao Zhang, Jin Yang, and Yanli Liu
- Subjects
Adult ,Male ,0301 basic medicine ,China ,Coke oven ,Urinary system ,Air Pollutants, Occupational ,Patient Health Questionnaire ,010501 environmental sciences ,complex mixtures ,01 natural sciences ,Oxidative damage ,Young Adult ,03 medical and health sciences ,chemistry.chemical_compound ,Age Distribution ,Risk Factors ,Occupational Exposure ,medicine ,Humans ,Food science ,Polycyclic Aromatic Hydrocarbons ,Lung cancer ,Coke ,Carcinogen ,0105 earth and related environmental sciences ,Guanosine ,Heavy smoking ,Smoking ,Public Health, Environmental and Occupational Health ,Middle Aged ,medicine.disease ,Oxidative Stress ,Logistic Models ,030104 developmental biology ,chemistry ,Air Pollution, Indoor ,Environmental chemistry ,Population study ,Female ,DNA ,DNA Damage - Abstract
Coke oven emissions containing polycyclic aromatic hydrocarbons (PAHs) are predominant toxic constituents of particulate air pollution that have been linked to increased risk of lung cancer. Numerous epidemiological studies have suggested that oxidative DNA damage may play a pivotal role in the carcinogenic mechanism of lung cancer. Little is known about the effect of interaction between PAHs exposure and lifestyle on DNA oxidative damage. The study population is composed by coke oven workers (365) and water treatment workers (144), and their urinary levels of four PAH metabolites and 8-hydroxydeoxyguanosine (8-OHdG) were determined. Airborne samples of exposed sites (4) and control sites (3) were collected, and eight carcinogenic PAHs were detected by high-performance liquid chromatography. The median values of the sum of eight carcinogenic PAHs and BaP in exposed sites were significantly higher than control sites (P
- Published
- 2017
5. Quantitative coherence analysis with an X-ray Talbot–Lau interferometer
- Author
-
Peiping Zhu, Wanxia Huang, Ziyu Wu, Qingxi Yuan, Youli Hong, Xiaosong Liu, Kai Zhang, Kun Gao, Xin Ge, Zhili Wang, and Huitao Zhang
- Subjects
Physics ,Interferometric visibility ,business.industry ,Astrophysics::High Energy Astrophysical Phenomena ,Physics::Optics ,Degree of coherence ,Grating ,Biochemistry ,Analytical Chemistry ,Generator (circuit theory) ,Interferometry ,Optics ,Point (geometry) ,Physics::Atomic Physics ,Absorption (electromagnetic radiation) ,business ,Visibility - Abstract
Differential phase-contrast (DPC) X-ray imaging has been performed in the Talbot-Lau configuration, in which the X-ray source was a combination of an absorption grating and a laboratory X-ray generator. We report here quantitative analysis of partial coherence effects on the X-ray Talbot-Lau interferometer. Based on the visibility of the self-image, the well-known geometry condition is reproduced. It is shown that effects of partial coherence are determined by the opening ratio of the source grating, and that the effects are independent of the Talbot order and the type of the phase grating, a condition quite different from those in a Talbot interferometer. A possible explanation is discussed from the point of view of the effective spatial coherence length. Taking into account the available X-ray flux and experimental fluctuations, we present the optimum opening ratio. Furthermore, we mention that our results can also be successfully used to discuss the properties of a multiline X-ray source.
- Published
- 2010
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.