ABSTRACT
Wood-inhabiting fungi are a cosmopolitan group and show a rich diversity, growing in the vegetation of boreal, temperate, subtropical, and tropical regions. Xylodon grandineus, X. punctus, and X. wenshanensis spp. nov. were found in the Yunnan-Guizhou Plateau, China, suggested here to be new fungal species in light of their morphology and phylogeny. Xylodon grandineus is characterized by a grandinioid hymenophore and ellipsoid basidiospores; X. punctus has a membranous hymenophore, a smooth hymenial surface with a speckled distribution, and absent cystidia; X. wenshanensis has a grandinioid hymenophore with a cream to slightly buff hymenial surface and cystidia of two types. Sequences of the ITS and nLSU rRNA markers of the studied samples were generated, and phylogenetic analyses were performed using the maximum likelihood, maximum parsimony, and Bayesian inference methods. After a series of phylogenetic studies, the ITS+nLSU analysis of the order Hymenochaetales indicated that, at the generic level, six genera (i.e., Fasciodontia, Hastodontia, Hyphodontia, Lyomyces, Kneiffiella, and Xylodon) should be accepted to accommodate the members of Hyphodontia sensu lato. According to a further analysis of the ITS dataset, X. grandineus was retrieved as a sister to X. nesporii; X. punctus formed a monophyletic lineage and then grouped with X. filicinus, X. hastifer, X. hyphodontinus, and X. tropicus; and X. wenshanensis was a sister to X. xinpingensis.
ABSTRACT
Hierarchical copper sulfide/bismuth tungstate (CuS/Bi2WO6) p-n junction with two-dimensional (2D) interfacial coupling were prepared through a two-step hydrothermal method. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, diffuse reflectance spectroscopy, photoluminescence spectroscopy, photocurrent and electrochemical impedance spectroscopy. CuS nanoplates anchored on the surface of hierarchical Bi2WO6 microspheres consisting of Bi2WO6 nanosheets to form a CuS/Bi2WO6 p-n junction photocatalyst. The photocatalytic activity of glyphosate degradation over CuS/Bi2WO6 under 44â¯W light-emitting diode (LED) light irradiation (λâ¯>â¯400â¯nm) was investigated. The results indicate that the CuS/Bi2WO6 heterojunctions display higher photocatalytic activity than pure CuS and Bi2WO6. The improved photocatalytic activity of the CuS/Bi2WO6 heterostructures can be attributed to strong visible light absorption and enhanced separation of photogenerated charge carriers by the internal electric field near the interface of the p-n junction. In addition, the CuS/Bi2WO6 p-n junction photocatalysts consisting of nanosheets are beneficial for the transport of photoexcited charge carriers, thus resulting in the increase of the photocatalytic activity of glyphosate degradation. This work provides the new avenue for the development and design p-n junction materials for photocatalytic applications.
ABSTRACT
The novel peanut-like shaped MoSe2/BiVO4 composites were fabricated via a facile two-step hydrothermal method and their photocatalytic activity was evaluated by the degradation of glyphosate under the visible light irradiation. The efficient transfer of photogenerated carriers and the charge separation were confirmed by photoluminescence spectra (PL), electrochemical impedance spectroscopy (EIS) and photocurrent. The coupling of MoSe2 and BiVO4 remarkably enhanced the photocatalytic activity. The 0.15MoSe2/BiVO4 composite showed the highest photocatalytic performance for the degradation of glyphosate among all the as-prepared photocatalysts and presented the high stability and good reusability in the photocatalytic reactions.
