| 1 | MXene-derived TiO_(2)nanosheets decorated with Ag nanoparticles for highly sensitive detection of ammonia at room temperature显示文摘Due to their large surface-to-volume ratio and low electronic noise,two-dimensional transition metal carbides(Ti_(3)C_(2)T_(x) MXene)and their derived transition metal oxides have demonstrated significant potential for use in high-precision gas sensing.However,the construction of high-sensitivity Ti_(3)C_(2)T_(x) MXene-based gas sensors operated at room temperature(RT)is still a major challenge.Herein,we demonstrate a sensitive nanocomposite prepared by uniformly anchoring silver nanoparticles(AgNPs)on Ti_(3)C_(2)T_(x) MXene-derived transition metal oxide(TiO_(2))nanosheets for high-sensitivity NH_(3) detection.AgNPs can not only serve as spacers to effectively prevent the restacking of MXene-derived TiO_(2)nanosheets and ensure an effective transmission highway for target gas molecules,but also enhance the sensitivity of the sensor through chemical and electronic sensitization.By integrating the unique merits of the individual components and the synergistic effects of the composites,the optimized Ag@TiO_(2)nanocomposite-based sensors revealed an extraordinary response value of 71.8 to 50 ppm NH_(3) at RT with a detection limit as low as 5 ppm.In addition,the Ag@TiO_(2)NH_(3) sensor also exhibits excellent selectivity and outstanding repeatability.This strategy provides an avenue for the development of MXene derivatives for advanced gas sensors. | Jie Wen Zihao Song Jiabao Ding Feihong Wang Hongpeng Li Jinyong Xu Chao Zhang | 2022 | Journal of Materials Science & Technology2022，，19： | 1 |
| 2 | Efficacy and safety of Weichang’an pill(胃肠安丸)combined with Western Medicine on gastrointestinal diseases:a systematic review and Meta-analysis显示文摘OBJECTIVE:To systematically evaluate the efficacy and safety of Weichang’an pill(胃肠安丸,WCA)combined with Western Medicine(WM)for the treatment of gastrointestinal diseases.METHODS:Eight databases,including China National Knowledge Infrastructure Database,Wanfang Data,China Science and Technology Journal Database,SinoMed,PubMed,Web of Science,Cochrane Library,and Embase,were searched for randomized controlled trials(RCTs)of WCA from inception to 30 September 2021.We independently screened the literature,extracted data,and then evaluated the bias risk,effectiveness,safety,and other indicators of the included articles.RESULTS:A total of 33 RCTs were included in this study with 3368 patients.After analysis,it was found that WCA combined with WM could effectively prevent and treat antibiotic-associated gastrointestinal reaction,functional dyspepsia(FD),irritable bowel syndrome,rotavirus diarrhea(RVD),and ulcerative colitis(UC);no serious adverse reactions occurred.Moreover,compared with the control group,the experimental group showed significantly improved symptoms and some biochemical parameters.CONCLUSIONS:WCA combined with WM for the treatment of gastrointestinal diseases had better clinical efficacy than the control group,without serious adverse reactions.Notably,in the treatment of FD,RVD,and UC,WCA improved clinical symptoms and biochemical indicator expression.Nevertheless,owing to the restricted quality and quantity of the literature,the results need to be further studied using high-quality RCTs. | WANG Jiabao ZHANG Lishuang NIU Baihan YU Yajun YANG Fengwen MIAO Lin CHAI Lijuan DING Xinya SUN Yingjie WANG Yujing WANG Lin ZHANG Han WANG Yi LI Lin | 2023 | Journal of Traditional Chinese Medicine2023，43，6： | 0 |
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