Zhejiang Gongshang University

About: Zhejiang Gongshang University is a education organization based out in Hangzhou, China. It is known for research contribution in the topics: Computer science & Chemistry. The organization has 8258 authors who have published 7670 publications receiving 90296 citations. The organization is also known as: Zhèjiāng Gōngshāng Dàxué.

Identity-Based Conditional Proxy Re-Encryption

Abstract: This paper proposes a new cryptographic primitive, named identity-based conditional proxy re-encryption (IBCPRE). In this primitive, a proxy with some information (a.k.a. re-encryption key) is allowed to transform a subset of ciphertexts under an identity to other ciphertexts under another identity. Due to the specific transformation, IBCPRE is very useful in encrypted email forwarding. Furthermore, we propose a concrete IBCPRE scheme based on Boneh-Franklin identity-based encryption. The proposed IBCPRE scheme is secure against the chosen ciphertext and identity attack in the random oracle.

Fabrication of Z-Scheme Fe2O3–MoS2–Cu2O Ternary Nanofilm with Significantly Enhanced Photoelectrocatalytic Performance

Abstract: Ternary Fe2O3–MoS2–Cu2O nanocomposites were fabricated via electrodeposition and hydrothermal method. The as-prepared photocatalytic films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that MoS2 and Cu2O particles were successfully deposited onto the surface of Fe2O3 particles. MoS2 and Cu2O coloading achieved a synergetic effect on the improvement of the photoelectrochemical performance of Fe2O3 film. The highest photocurrent density was achieved on Fe2O3–MoS2–Cu2O film, which was 20, ∼5.5, and 2 times those of Fe2O3, Fe2O3–MoS2, and Fe2O3–Cu2O films, respectively. The excellent photoelectrocatalytic performance was attributed to the Z-scheme electron transfer mechanism, which results in the fast charge transfer and strong redox ability on the ternary composite. This work provides a promising Z-scheme ternary semiconductor for environmental purification and water oxidation.

Ultraviolet Irradiation of Permanganate Enhanced the Oxidation of Micropollutants by Producing HO• and Reactive Manganese Species

Abstract: Permanganate was activated by ultraviolet (UV) photolysis at 254 nm, resulting in the efficient degradation of micropollutants. The degradation of four probe molecules (i.e., nitrobenzene, benzoic acid, terephthalic acid, and p-chlorobenzoic acid) and two micropollutants (i.e., gemfibrozil and nalidixic acid) resistant to permanganate oxidation was enhanced by the UV/permanganate system, with pseudo-first-order rate constants (k′) of 0.065–0.678 min–1 under the experimental conditions. Hydroxyl radicals (HO•) and Mn(V) peroxide, which were produced during the activation of permanganate by UV irradiation, were responsible for the enhancement. The quantum yield of HO• was 0.025 ± 0.001 mol Einstein–1 (mol Es–1) in the system. HO• oxidation primarily accounted for the degradation of nitrobenzene and gemfibrozil, while both HO• and Mn(V) were responsible for the degradation of benzoic acid, terephthalic acid, p-chlorobenzoic acid, and nalidixic acid. This study is the first report on the activation of permang...