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Recently， approximately 20% of the products unqualified in the national sampling inspection of imported food have been found through food label inspection， which has become one of the most important inspection methods for imported prepackaged food. In this study， the labels of imported prepackaged food were analyzed to determine the important inspection points， noting that particular attention should be paid to the conformity of products with the entry and registration requirements of the general administration of customs， the use of compliant raw materials， and the standardization of the special labeling content. The results suggest that the quality and efficiency of label inspection should be improved from four aspects： enhancing the awareness and ability to prevent and control unqualified risks， strengthening the training of inspectors’ professional skills， developing an artificial intelligence label verification system， and optimizing the relevant laws and standards to improve the safety of imported prepackaged food.

CuBi2O4 is a promising p-type semiconductor material with a theoretical maximum current density of about 19.7 mA cm‒2. Although CuBi2O4 has a very high theoretical photocurrent, its poor charge transmission efficiency makes its actual photocurrent far less than its theoretical values. Herein, an in situ modification method is adopted to prepare a photocathode material with Ag as conductive channels. A metal–organic coating method is used to introduce Ag conductive channels, promoting the charge transmission between grains. Ag particles play the role of electrical connection, and improve the separation and transmission of carriers, so as to obtain enhanced photocurrent density. In situ formed Ag conductive channels significantly enhanced the PEC performance of CuBi2O4 photocathodes. [ABSTRACT FROM AUTHOR]

As a photocathode with a band gap of about 1.8 eV, copper bismuthate (CuBi 2 O 4 ) is a promising material for photoelectrochemical (PEC) water splitting. However, weak charge transfer capability and severe carrier recombination suppress the PEC performance of CuBi 2 O 4 . In this paper, the conductivity and carriers transport of CuBi 2 O 4 are improved via introducing Zn 2+ into the synthesis precursor of CuBi 2 O 4 , driving a beneficial 110 mV positive shift of onset potential in photocurrent. Detailed investigations demonstrate that the introduction of an appropriate amount of zinc leads to in situ segregation of ZnO which serves as an electron transport channel on the surface of CuBi 2 O 4 , forming heterojunctions. The synergistic effect of heterojunctions and doping simultaneously promotes the charge transfer and the carrier concentration. OCP experiment proves that ZnO/Zn-CuBi 2 O 4 possesses better charge separation; the Mott-Schottky curve shows that the doping of Zn significantly enhances the carrier concentration; carrier lifetime calculated from time-resolved photoluminescence confirms faster extraction of carriers., (© 2024 Wiley-VCH GmbH.)

Herein, an integrated solar-thermal-power protocol is presented at a micro-nanoscopic level to maximize the energy utilization efficiency involving utilization period and utilization patterns, and the nexus of freshwater production and nanogeneration is realized. This sophisticated vaporization device is constructed with the merits of thermally confined evaporation space in favor of recycling latent heat of condensation and optimizing light absorption based on the local sunlight angle of incidence. Inspired by a bird's nest, Sb 2 WO 6 /D-Fructose composites are prepared as photothermal absorbers to achieve a superior water evaporation rate of 2.78 kg m -2  h -1 in the Multi-stage evaporator. In addition, a synergistic tandem photo thermal-electric device with a combination of solar-driven water evaporation and further waterflow-driven hydrovoltaic generation, which can output a stable voltage of up to 360.8 mV with effective utilization of steam energy and a limited water source, is exploited. Such integrated configurations pave a pathway for clean water production and renewable power generation simultaneously toward energy issues., (© 2024 Wiley-VCH GmbH.)