Facile synthesis of TiO2/In2S3/CdS ternary porous heterostructure arrays with enhanced photoelectrochemical and visible-light photocatalytic properties
JOURNAL OF MATERIALS CHEMISTRY C
Authors: Zuo, Yong; Chen, Jinjun; Yang, Haocheng; Zhang, Miao; Wang, Yanfen; He, Gang; Sun, Zhaoqi
Abstract
In this paper, TiO2/In2S3/CdS ternary porous heterostructure arrays are successfully synthesized on FTO (fluorine-doped tin oxide) substrates through a hydrothermal reaction and an in situ cation exchange method. The microstructure, morphology, and composition, as well as the optical, photoelectrochemical and photocatalytic properties, of the obtained samples are studied. The results demonstrate that the TiO2/In2S3/CdS ternary heterostructure arrays can significantly enhance the separation rate of electron-hole (e(-)-h(+)) pairs, improve the absorption of visible light, and augment the photoelectrochemical and photocatalytic properties. The resulting photocurrent density (0.18 mA cm(-2)) and photodegradation efficiency (58.8%) of TiO2/In2S3/CdS (30 min) are approximately 18 and 6 times higher than those of TiO2 nanorod (TNR) arrays, respectively. The excellent performance can be ascribed to the synergistic effect of the components in the TiO2/In2S3/CdS ternary porous heterostructure arrays, such as (i) the presence of a double type-II band alignment at the interfaces, (ii) increasing the absorption of visible light through the large specific surface area of porous In2S3, and (iii) the ideal band gaps of In2S3 and CdS.
C-11-acetate and F-18-fluorodeoxyglucose positron emission tomography/computed tomography dual imaging for the prediction of response and prognosis after transarterial chemoembolization
MEDICINE
Authors: Park, Sohyun; Kim, Tae-Sung; Kang, Se Hun; Kim, Hyun Beom; Park, Joong-Won; Kim, Seok-ki
Abstract
The aim of the present study was to evaluate the clinical significance of dual radiotracer studies, C-11-acetate and F-18-fluoro-Dglucose positron emission tomography/computed tomography (F-18-FDG PET/CT), for the prediction of response and recurrence after transarterial chemoembolization (TACE). This study retrospectively included a total 42 hepatoceullar carcinoma (HCC) patients (median age, 59; range, 34-85 years old) who underwent C-11-acetate and F-18-FDG PET/CT concurrently. Tumor uptake normalized by liver uptake (TNR; maximum tumor SUV to mean normal liver SUV ratio) was obtained first. Then, FAratio, which is the ratio of F-18-FDG TNR (TNR_FDG) to C-11-acetate TNR, was obtained and correlated with response after TACE and recurrence-free survival (RFS), using a Cox multivariate proportional-hazard model. Among clinical factors, including the Hepatoma Arterial Embolization Prognostic score and positron emission tomography (PET) parameters, multiple regression analysis revealed FAratio and tumor size to be the only significant factors. As a PET parameter, FAratio exhibited the largest area under the curve in the prediction of response after TACE. In the Cox multivariate proportional-hazard model, TNR_FDG was the only significant predictive factor for RFS. In subgroup analysis, TNR_FDG was the only significant predictive factor for recurrence in intermediate stage patients. However, FAratio was the only significant predictive factor for recurrence in advanced stage patients. Dual radiotracer use of C-11-acetate and F-18-FDGPET/CT contributed to the prediction of response and recurrence after TACE. Used in addition to F-18-FDG, C-11-acetate PET/CT could give additional information in advanced stage patients. Based on the characteristics of tumor metabolism assessed by dual radiotracer PET/CT, treatment plans could be more personalized and optimized.
COA
Publication 
Loading ......
