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Highly selective photocatalytic conversion of CO2 into valuable hydrocarbon fuel such as CH4 is a promising solution to tackle greenhouse effect and energy shortage. To achieve this goal, more efforts should be made to design well-performed catalysts. In this work, a series of composite photocatalysts were fabricated for CO2 reduction, through hydrothermal mixing of hydroxylated TiO2 (P25m) with sulfonated covalent porphyrin polymers (s-COP-P). Notably, the optimal sample 2%-s-COP-P/P25m (2% denotes the weight percent of s-COP-P) exhibits the highest production rate (15.5 μmol g−1 h−1) and selectivity (> 90%) of all composites for the formation of CH4 within 1 h, which are nearly 33 and 2 times as large as that of P25m. This good performance was attributed to improved photogenerated carrier separation efficiency verified by enhanced photocurrent and reduced fluorescence intensity that associating closely with the interaction between two moieties of the composites. Based on energy band structure analyses and hydroxyl radical probing, the reduction of CO2 into CH4 was proposed occurring mainly on P25m moiety companied with the oxidation of H2O into hydroxyl radical. In addition, high cyclic stability was confirmed for the composite catalyst by constant photocatalytic performance lasting over four times of cyclic test. This work provides a facile and effective way to design stable photocatalyst for the conversion of CO2 into CH4 in high production rate and selectivity. A sulfonated porphyrin polymer/P25m composite of high cyclic stability was fabricated by simple thermal mixing, and exhibits high photocatalytic activity for the conversion of CO2 into CH4 with a rate of 15.6 μmol g−1 h−1 and a selectivity of > 90%. [ABSTRACT FROM AUTHOR]

Background: Internet is gradually reshaping adolescents' behaviors in China. It is important to identify the prevalence and risk factors to predict Internet addiction among adolescent psychiatric patients. Methods: The survey was conducted among inpatient or outpatient adolescent patients with mental disorders. All participants were interviewed face-to-face and completed Young Internet Addiction Test and other relevant assessments. Binary logistic regression analysis was used to exam between-group differences of internet addiction. Result: The prevalence for internet addiction (mild to severe) in adolescent psychiatric patients was 80.2%, where the prevalence for "medium and severe internet addiction was 25.5%. Logistic regression analysis identified two independent predictors for "medium and severe internet addiction" including the total score of Adolescent Non-suicidal-self-injury (NSSI) Behavior Function Assessment Scale (ANBFAS) and the diagnosis of generalized anxiety disorder (GAD) (R2 =0.27, p =.02 for total ANBFAS score, p =.01 for GAD) in psychiatric adolescent patients. Conclusion: The prevalence of internet addiction is notably high among adolescent psychiatric patients in China. Coping for Internet addiction in adolescent psychiatric patients should conclude the coping of NSSI and GAD. [ABSTRACT FROM AUTHOR]

Threedifferent methods were used to prepare CuY catalysts, whichplay an important role in Cu loading and ion-exchange level duringthe oxidative carbonylation of ethanol to synthesize diethyl carbonate.Of the prepared CuY catalysts, those synthesized by the ammonia evaporationmethod exhibited a significantly enhanced activity compared to thoseobtained by the other two methods. In addition, under optimized conditions,four different copper precursors were applied to adjust the texturalproperties and chemical states of the CuY catalysts. To obtain a deepunderstanding of their structure–performance relationship,XRD, XPS, CO adsorption, DRIFTS, and NH3TPD were conductedto characterize the CuY catalysts. The experimental results indicatedthat the catalytic performances were in line with the proportionsof Cu+in CuY catalysts, which can be regulated by cupricprecursors. In addition, the textural structures of the catalystsand the acidity and type of Cu+species influenced by theprecursors were all responsible for the activity and product distribution. [ABSTRACT FROM AUTHOR]