Recent advances in photodegradation of antibiotic residues in water

Luminescent lanthanide metal-organic framework test strip for immediate detection of tetracycline antibiotics in water.

Novel AgI/BiSbO4 heterojunction for efficient photocatalytic degradation of organic pollutants under visible light: Interfacial electron transfer pathway, DFT calculation and degradation mechanism study.

Inspired by the transpiration and natural photosynthesis of plants, bifunctional properties of mixed-dimensional Ti3C2Tx (MXene)/La0.5Sr0.5CoO3 (LSC) nanohetero-structures to degrade pollutants via photochemical reactions and simultaneously produce fresh water through photothermal effect were explored. Zero-dimensional (0D) LSC in the nanohybrid can absorb short-wave photons to generate active oxidative species for photocatalytic degradation, while photothermal components can convert long-wave photons into heat to evaporate water. More importantly, the hybrid hydrogels are developed by integrating MXene/LSC nanohybrids with polyvinyl alcohol (PVA) and chitosan (CS), which offers excellent thermal insulation, fluent water transport and low water vaporization enthalpy to accelerate water evaporation. Benefiting from the materials selection and design, the assembled MXene/LSC hydrogels (MLH) achieve a light-to-heat conversion efficiency of 92.3 %, and acquire a superior photodegradation efficiency of 97.2 % toward the removal of tetracycline hydrochloride (TC). The MLH evaporator also possesses a significant capacity in the purification of brine and wastewater.

Synergy of photocatalysis and photothermal effect in integrated 0D perovskite oxide/2D MXene heterostructures for simultaneous water purification and solar steam generation

Ammonia is the main precursor for the production of fertilizers, a hydrogen energy carrier and an emerging clean fuel that plays a crucial role in sustaining life on the globe. Herein, hybrid MoSe2@g-C3N4 micro/nanostructures are described that can serve as photoelectrochemical (PEC) catalysts to fix N2 into NH3 in a basic electrolyte at a low potential (−0.3 V vs. RHE) under ambient conditions. In situ functionalization of the hierarchical micro/nanoflowers of MoSe2 with exfoliated g-C3N4 nanosheets dramatically boosts the faradaic efficiency and yield rate up to 28.91% and 7.72 μmol h−1 cm−2 respectively. The high PEC activity can be attributed to the hierarchical architecture, light-harvesting capability, tunable active sites and formation of heterojunctions, as confirmed by various characterization and density functional theory (DFT) calculations. Therefore, this work not only develops an effective procedure to obtain hierarchical heterojunction catalysts towards a high-efficiency NRR but also provides a deep understanding of artificial N2 fixation at the MoSe2@g-C3N4 interface.

Photoelectrochemical reduction of N2 to NH3 under ambient conditions through hierarchical MoSe2@g-C3N4 heterojunctions

Preparation of Ag-AgVO3/g-C3N4 composite photo-catalyst and degradation characteristics of antibiotics.

This article is based on the Arduino controller and Linkboy integrated development system, APP Inventor and the Internet of Things platform of Bafa Cloud, and uses the Internet of Things system for intelligent management of morels cultivation as research. The morels planting management Internet of Things application system is based on the needs of the morels planting environment, using the microcontroller series single-chip Arduino2560 as the core system to collect the temperature, humidity, soil humidity, light, wind and other data of the morel growth environment and use The WIFI module ESP32 performs network transmission, combined with the Bafa Cloud Internet of Things platform, mobile phone App, mobile WIFI and solar energy conversion system, to realize the all-weather temperature and humidity, light, wind, soil humidity, etc. of Morels in the wild planting management Indicator monitoring, through local or remote control of the humidity and soil water content in the area, to achieve real-time monitoring and control of morel growth indicators.

Danyao Chen

Papers

Preparation of Ag-AgVO3/g-C3N4 composite photo-catalyst and degradation characteristics of antibiotics.

Research on Application of Intelligent Management System for Morchella Planting Based on Internet of Things Technology