Improving visible-light-induced photocatalytic ability of TiO2 through coupling with Bi3O4Cl and carbon dot nanoparticles

The fabrication of photocatalysts with considerable photocatalytic performance can be the main purpose for the researchers to substitute the traditional wastewater treatment processes. Accordingly, in this work, visible-light-responsive TiO2/Bi3O4Cl/carbon dots (denoted as TO/BOC/CD) photocatalysts were synthesized via simple strategy. Multiple techniques including EIS, photocurrent, XPS, PL, UV-vis DRS, BET, FT-IR, EDX, XRD, HRTEM, and SEM were employed to explore electrochemical, chemical, and physical features of the nanocomposites. The photocatalytic ability of the samples for Cr (VI), methylene blue, fuchsine, and rhodamine B removals was examined to display their widespread capability in removing different pollutants. The optimal photocatalytic performance related to the nanocomposite with 20% of BOC and 1 mL of CD solution (TO/BOC/CD (1 mL) photocatalyst), which was 13.8, 25.9, 14.2, and 52.3-folds as high as the TiO2 and 2.84, 2.26, 2.57, and 5.25-times higher than the TO/BOC (20%) nanocomposite in removals of Cr (VI), methylene blue, fuchsine, and rhodamine B, respectively. The impressive photocatalytic activity of the TO/BOC/CD photocatalysts is ascribed to the betterment of the optical property of the fabricated photocatalysts. With the enhancement CD content, the respective ternary nanocomposites displayed the highest optical absorption in the visible region. The other reasons in improving the photocatalytic activity are related to increased e(-)/h(+) separation capability, and better textural properties. Additionally, trapping experiments demonstrated that the holes and superoxide anion radicals possess a substantial role during the photocatalytic reaction. Thus, this work could promote the potential utilization of TiO2-based photocatalysts for removal of hazardous contaminants under visible light

Determination Of Frequency Rate Of Chlamydia Pneumonia Infection In Two Groups Of Patients With And Without AMI

Background: ‏Today, coronary artery disease is a leading cause of death and morbidity in the world and recognition of all aspects of this problem appears to be necessary and important. In recent years in addition to traditional coronary risk factors, other new risk factors are presented that can affect coronary arteries and accelerate atherosclerosis process. One of the most important of these, are infections, specially with Chlamydia pneumonia. We aimed to study this possibility that is whether correlation between infection with Chlamydia pneumonia and Acute Myocardial Infarction. (AMI). Materials and Methods: This research is a descriptive case-control study which evaluates frequency of infection with Chlamydia pneumonia in the 100 patients with AMI and 105 patients without any history or evidence of CAD admitted in sections of CCU and surgery, in Dr. SHARIATI and SINA hospitals in 2001. For this purpose we took 5ml blood sample from all of the patients, and tested for specific anti Chlamydia pneumonia antibodies (IgG & IgM) by ELISA method. Results: Our study showed that 38 percent of control group patients and 54 percent of patients with AMI had positive titer of anti Chlamydia pneumonia antibody and so they were infected with Chlamydia pneumonia {OR= 1.9 (95% CI: 1.34 to 2.46)} (P< 0/001). Conclusion: This study demonstrates that, there is significant correlation between infection with Chlamydia pneumonia and occurrence of AMI so treatment of this infection could be of profit