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    Recent advances in manipulating strategies of NH2-functionalized metallic organic frameworks-based heterojunction photocatalysts for the sustainable mitigation of various pollutants
    (Academic Press Inc Elsevier Science, 2024) Kaur, Balvinder; Soni, Vatika; Kumar, Rohit; Singh, Pardeep; Selvasembian, Rangabhashiyam; Singh, Archana; Thakur, Sourbh
    NH2-functionalized metal-organic frameworks (NH2-functionalized MOFs) can abate organic pollutants, predominantly favored by their chemical, mechanical, and thermal stabilities. The present review stated the chemistry of identifying NH2-functionalization and its role in enhancing the properties of bare MOFs. The integration of the amine group bestows several advantages: 1.) enabling band structure modification, 2.) establishing strong metal-NH2 bonds, 3.) preserving MOF structures from reactive oxygen species, and 4.) shielding MOF structures against pH alterations. Consequently, the NH2-functionalized MOFs are promising materials for the photodegradation of organic contaminants. The following section illustrates the two approaches (pre-synthetic and post-synthetic) for NH2-functionalized MOFs. Nevertheless, specific intrinsic limitations, entailing a high recombination rate of charge carriers and inadequate optical adsorption, restrain the applicability of NH2-functionalized MOFs. Accordingly, the succeeding segment presents strategies to elevate the photocatalytic activities of NH2-functionalized MOFs via heterojunction fabrication. The importance of the NH2- functionalized MOFs-based heterojunction has been evaluated in terms of the effect on the enhancement of charge separation, optical adsorption, and redox ability of charge carriers. Subsequently, the potential application for organic pollutant degradation via NH2-functionalized MOFs-based heterojunctions has been scrutinized, wherein the organic pollutants. Eventually, the review concluded with challenges and potential opportunities in engaging and burgeoning domains of the NH2-functionalized MOFs-based heterojunctions.
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    Unveiling new horizons of progress on manipulating the structure and characterization of phosphate-modified polymer for selective uranium adsorption
    (Elsevier Science Sa, 2024) Kaur, Balvinder; Rana, Parul; Singh, Pardeep; Singh, Archana; Chaudhary, Vishal; Kaya, Savas; Van Le, Quyet
    The hazardous effect of Uranium (U(VI)) on the environment principally stems from its metallic and radioactive properties. Considering the toxicity and radioactivity of U(VI)), there is an imperative necessity to remove U(VI)) from wastewater through various adsorbents. This comprehensive review delves into the quest for employing phosphate-modified polymers for U(VI) uptake by adsorption. The review emphasizes the critical role of U(VI) specific binding to phosphate-modified polymers in increasing the affinity of polymers toward U(VI). The merging of phosphate-based polymers and interactions such as coordination bonding and complexation generated a precise speculation of the chemisorption exhaustion mechanism. The advertisements for interactions with the adsorbent are determined by parameters like pH, coexisting ions, ionic strength, temperature, and contact time, which gives information about the adsorption process. This review summarises the recent breakthroughs towards the classifications, synthesis, and adsorption mechanism of phosphate-modified polymers. In turn, the capacity of phosphate-modified polymers to adsorb contributes to the fact that the polymers are regeneratable after desorption. Overall, this clarifies the potential of phosphate modification to improve the adsorption capacity of polymer adsorbents.