可再生能源技术在住宅项目应用中的经济效益分析

传统能源总有用完耗尽的时候,发展可再生能源正在成为当今世界新的能源革命。在住宅项目中大力提倡和应用可再生能源,是实现房地产行业可持续发展、发展循环经济的关键,也是全面建设小康和谐社会的必然选择。文章以笔者参与建设的南京栖园项目为例,对太阳能生活热水技术、太阳能光伏发电技术、地源热泵技术等可再生能源技术在住宅项目应用中的经济效益进行了分析,认为应用了可再生能源技术后,不仅大大地降低了成本,带来了巨大的经济效益,而且具有长远的示范意义。     

Room-Temperature Hydrogen Sensor with High Sensitivity and Selectivity using Chemically Immobilized Monolayer Single-Walled Carbon Nanotubes

Although semiconducting single-walled carbon nanotubes (sc-SWNTs) exhibit excellent sensing properties for various gases, commercialization is hampered by several obstacles. Among these, the difficulty in reproducibly fabricating sc-SWNT films with uniform density and thickness is the main one. Here, a facile fabrication method for sc-SWNT-based hydrogen (H₂) sensors with excellent reproducibility, high sensitivity, and selectivity against CO, CO₂, and CH₄ is reported. Uniform-density and monolayer sc-SWNT films are fabricated using chemical immobilized through the click reaction between azide-functionalized polymer-wrapped sc-SWNTs and immobilized alkyne polymer on a substrate before decorating with Pd nanoparticles (0.5–3.0 nm). The optimized sc-SWNT sensor has a high room-temperature response of 285 with the response and recovery times of 10 and 3 s, respectively, under 1% H₂ gas in air. In particular, this sensor demonstrates highly selective H₂ detection at room temperature (25 °C), compared to other gases and humidity. Therefore, the chemical immobilization of the monolayer SWNT films with reproducible and uniform density has the potential for large-scale fabrication of robust room-temperature H₂ sensors.