Donghua University

About: Donghua University is a education organization based out in Shanghai, China. It is known for research contribution in the topics: Fiber & Nanofiber. The organization has 21155 authors who have published 21841 publications receiving 393091 citations. The organization is also known as: Dōnghuá Dàxué & China Textile University.

Selective Oxidation of Arsenite by Peroxymonosulfate with High Utilization Efficiency of Oxidant

Abstract: Oxidation of arsenite (As(III)) is a critical yet often weak link in many current technologies for remediating contaminated groundwater. We report a novel, efficient oxidation reaction for As(III) conversion to As(V) using commercial available peroxymonosulfate (PMS). As(III) is rapidly oxidized by PMS with a utilization efficiency larger than 90%. Increasing PMS concentrations and pH accelerate oxidation of As(III), independent to the availability of dissolved oxygen. The addition of PMS enables As(III) to oxidize completely to As(V) within 24 h, even in the presence of high concentrations of radical scavengers. On the basis of these observations and theoretical calculations, a two-electron transfer (i.e., oxygen atom transfer) reaction pathway is proposed. Direct oxidation of As(III) by PMS avoids the formation of nonselective reactive radicals, thus minimizing the adverse impact of coexisting organic matter and maximizing the utilization efficiency of PMS. Therefore, this simple approach is considered ...

A Route Toward Smart System Integration: From Fiber Design to Device Construction.

Abstract: Fiber is a symbol of human civilization, being ubiquitous but obscure in society over most of history. Fiber has been revived upon the advent of fiber-based electronic devices in the past two decades. This is due to its desirable lightweight, flexible, and conformable characteristics, which enable it to play a fundamental role in the electronic and information era. Numerous fiber-based electronic devices have sprung up in energy conversion, energy storage, sensing, actuation, etc. A possibility is thereby conceived that they can be integrated into smart systems compatible with the human body, consisting of biotic fiber-based organs and tissues, which possess similar but more advanced functions. However, the design of mono-/multifibers, the construction of fiber-based devices, and the integration of these smart systems represent great challenges in fundamental understanding and practical implementation. A systematic review of the current state of the art with respect to the design and fabrication of electronic fiber materials, construction of fiber-based devices, and integration of smart systems is presented. In addition, limitations of current fiber-based devices and perspectives are explored toward potential and promising smart integration.

Ultrastrong, Superelastic, and Lamellar Multiarch Structured ZrO2-Al2O3 Nanofibrous Aerogels with High-Temperature Resistance over 1300 °C.

Abstract: Advanced ceramic aerogel materials with a performance combining sufficient mechanical robustness and splendid high-temperature resistance are urgently needed as thermal insulators in harsh environments. However, the practical applications of ceramic aerogel materials are always limited by poor mechanical performance and degradation under thermal shock. Here, we report the facile creation of lamellar multiarch structured ceramic nanofibrous aerogels that are simultaneously ultrastrong, superelastic, and high temperature resistant by combining ZrO2-Al2O3 nanofibers with Al(H2PO4)3 matrices. The resulting ZrO2-Al2O3 nanofibrous aerogels exhibit the integrated properties of rapid recovery from a strain of 90%, high compression strength of more than 1100 kPa (at a strain of 90%), high fatigue resistance, and temperature-invariant superelasticity. Moreover, the all-ceramic component feature also provides the ceramic nanofibrous aerogels with high-temperature resistance up to 1300 °C and thermal insulation performance with low thermal conductivity (0.0322 W m-1 K-1). These superior performances make the ceramic aerogels ideal for high-temperature thermal insulation materials in extreme conditions.

Decomposition of Toluene with a Combined Plasma Photolysis (CPP) Reactor: Influence of UV Irradiation and Byproduct Analysis

Abstract: A combined plasma photolysis (CPP) reactor was used to study the effect of UV irradiation on the removal efficiency and byproducts of toluene decomposition. The influence of UV irradiation length on the removal rate and byproducts were compared. The results show that the toluene removal is obviously improved in the CPP reactor. The removal rate is enhanced with the increase of the UV irradiation length. The increase of removal efficiency is 7.94% and 19.1% under the UV irradiation with 5 cm and 15 cm length, respectively. UV also reduces the production of ozone significantly. It is interesting to find that the effect of UV on the carbon balance is not always increased as expected, but is related to the inlet toluene initial concentration. When the inlet toluene concentration is 300 ppm or 400 ppm, the carbon balance is enhanced by UV. When the inlet concentration is lower, in 60 ppm and 100 ppm, UV no longer plays a positive role. However, UV can change the trend of carbon balance at low initial concentrations and makes it positively related to specific input energy (SIE), which is contrary to the cases without UV.