Self-cleaning isotype g-C3N4 heterojunction for efficient photocatalytic reduction of hexavalent uranium under visible light

Highly Efficient Uranium Capture via Crystalline Water Coordination Coupling with Cation Exchange and Surface Redox Reaction Mechanisms within an Open-Framework Vanadoborate

“…At this pH value, the removal capacity of SUT-6 reaches its maximum value of 347.7 mg/g, which shows the state-of-the-art removal capacity among all the reported crystalline inorganic open-framework porous materials, as shown in Table S2. The only exceptional case with superior capacity is SCU-19, which is an inorganic–organic hybrid metal-organic framework material. Spontaneously, the leaching concentrations of V and Zn under different pH values after UO 2 2+ removal experiments have also been monitored with inductively coupled plasma optical emission spectroscopy (ICP-OES), as shown in Figure d.…”

“…6−11 Among all the techniques mentioned above, developing highly efficient uranium removal materials based on an adsorption mechanism is a promising strategy to improve the capability to separate low-concentration uranium in polluted water. 12,13 However, it is limited to various aspects of developing state-of-the-art adsorbents, such as poor stability, low adsorption capacities, and slow uptake kinetics. Highly efficient adsorption materials are still of interest to be developed.…”

“…Uranium is widely used in the nuclear industry due to its high energy production during the nuclear fission process. However, its radiation and carcinogenic effects pose severe threats to the environment and human health. , It is highly desirable to develop an efficient and selective technique for radioactive uranium removal. − In this regard, many conventional methods such as adsorption, complexation, precipitation, photocatalytic reduction and membrane filtration have been widely explored to remove uranium from radionuclide-contaminated water. − Among all the techniques mentioned above, developing highly efficient uranium removal materials based on an adsorption mechanism is a promising strategy to improve the capability to separate low-concentration uranium in polluted water. , However, it is limited to various aspects of developing state-of-the-art adsorbents, such as poor stability, low adsorption capacities, and slow uptake kinetics. Highly efficient adsorption materials are still of interest to be developed. − …”

g‐C3N4‐Based 2D/2D Composite Heterojunction Photocatalyst

“…At a high pH value, the dissociated UO 2 2þ would combine with OH À via hydrolysis reaction, and ultimately existed in the form of (UO 2 ) x (OH) y 2xÀy . [131] The x and y values relied on the pH value. When the OH À concentration was so high to induce a y value larger than 2x, the (UO 2 ) x (OH) y 2xÀy group behaved as an anion.…”

Efficient Photocatalytic Extraction of Uranium over Ethylenediamine Capped Cadmium Sulfide Telluride Nanobelts

“…From the perspective of resource recovery and environmental protection, the conversion of soluble U­(VI) to insoluble U­(IV) in radioactive effluents has been widely studied. − The photocatalytic reduction approach possess high selectivity for nonreductive ions, which provides an environmentally friendly method to extract the U­(VI) in radioactive effluent. − However, the photocatalysts for U­(VI) reduction suffered from the low uranium uptake capacity and weak long-wavelength light absorption. − Different strategies have been proposed to optimize the photocatalysts of U­(VI) reduction, mainly by modulation of bandgap or introduction of adsorption sites over photocatalysts. The modulation of bandgap commonly originates from introduction impurity energy states into bandgap of photocatalysts, which can be simply achieved by the element doping.…”