Rapid global industrialization constantly impacts the environment by discharging pollutants. Therefore, various materials are currently being investigated for environmental applications, including two-dimensional (2D) MXenes. Herein, we focus on MXene-enabled technologies for removing inorganic and organic contaminants present in gaseous and liquid forms, especially organic dyes, pharmaceuticals, and solid pollutants. We foresee a considerable potential for MXene-enabled technologies to remove heavy ions and radionuclides and recover precious elements. We show that MXenes could efficiently inactivate microorganisms without harming the environment. Finally, we discuss the associated opportunities and challenges in MXenes’ surface chemistry, semiconducting activity, interfacial effects, adsorption, and photocatalysis. Altogether, this article showcases outstanding opportunities for MXenes in the rapidly growing field of environmental applications. Graphical abstract

Bio-neuronal led psychiatric abnormalities transpired by the loss of neuronal structure and function (neurodegeneration), pro-inflammatory cytokines, microglial dysfunction, altered neurotransmission, toxicants, serotonin deficiency, kynurenine pathway, and excessively produced neurotoxic substances. These uncontrolled happenings in the etiology of psychiatric disorders initiate further changes in neurotransmitter metabolism, pathologic microglial, cell activation, and impaired neuroplasticity. Inflammatory cytokines, the outcome of dysfunctional mitochondria, dysregulation of the immune system, and under stress functions of the brain are leading biochemical factors for depression and anxiety. Nanoscale drug delivery platforms, inexpensive diagnostics using nanomaterials, nano-scale imaging technologies, and ligand-conjugated nanocrystals used for elucidating the molecular mechanisms and foremost cellular communications liable for such disorders are highly capable features to study for efficient diagnosis and therapy of the mental illness. These theranostic tools made up of multifunctional nanomaterials have the potential for effective and accurate diagnosis, imaging of psychiatric disorders, and are at the forefront of leading technologies in nanotheranostics openings field as they can collectively and efficiently target the stimulated territories of the cerebellum (cells and tissues) through molecular-scale interactions with higher bioavailability, and bio-accessibility. Specifically, the nanoplatforms based neurological changes are playing a significant role in the diagnosis of psychiatric disorders and portraying the routes of functional restoration of mental disorders by newer imaging tools at nano-level in all directions. Because of these nanotherapeutic platforms, the molecules of nanomedicine can penetrate the Blood-Brain Barrier with an increased half-life of drug molecules. The discoveries in nanotheranostics and nanotherapeutics inbuilt unique multi-functionalities are providing the best multiplicities of novel nanotherapeutic potentialities with no toxicity concerns at the level of nano range.

The nanotechnology‐stem cell has enabled the engineering of nanotopographical surfaces for mimicking the topological features of nano‐stem cell interfaces and stem cell niches. The nanotechnology‐stem cell, an abiotic–biotic model, the impact of the multi‐functional materials underlying support on nanomaterials interactions with stem cells plays a significant role in the development of the nanoscale tools for tracking the top killer, arteriosclerosis, strokes, and heart attacks. The biomimetic topographical surfaces, employed in cell mechanobiology (cell adhesions, migrations, and differentiation) and tissue engineering. The conformational features of the scaffold (ridges, grooves, whorls, pits, and pores, and symmetry) alter stem cell behavior and differentiation. Biomedical engineering is offering promises and explaining how the convergence of nanotechnology and stem cells has emerged as novel therapeutics. The analysis of mechanotransduction and tissue engineering is the key factor, which altogether influence the stem cell niche, can be considered for originating nanno‐stem cell interface, and a useful remedy for treating cardiovascular diseases. The Hippo pathway underlined the signaling cascade responsible for inhibiting cell proliferation. Notch signaling is a key pathway that regulates the modulation of cardiomyocyte survival, cardiac stem cell differentiation. The Wnt/β‐catenin signaling involved in chronic infusion of angiotensin II (Ang II), cardiomyocytes, and cardiac fibroblasts.