拉合尔大学学院

The unevenly distributed environmental burdens of the Anthropocene become evident in conflicts surrounding the extractive industries. ThyssenKrupp’s steel mill (TKCSA) in Rio de Janeiro is an illustrative example. The factory transformed its surrounding landscape and emitted a fine metallic dust over its human and non-human neighbours. This article focuses on some of the less tangible elements of Anthropocene transformations around the mill. I examine ThyssenKrupp’s communication strategies to reveal the underlying meanings of corporate rhetorical devices, uncover the violence of public relations language and understand the intensity of feeling that surrounded it. I trace the affective registers that emerged around the steel mill as a result of its polluting activities, its approach to corporate communications, and its ‘corporate social responsibility’ (CSR) activities. Everyday life involved minimal corporeal expressions of emotion that encapsulated feeling and allowed for perseverance in the face of toxic suffering. The ‘Stop TKCSA’ campaign involved affective labour; emotions were the agentic contribution campaigners were able to make in the context of unequal power structures. I centre these less visible dynamics of power to examine how emotions can shape experiences of environmental conflict, form coalitional politics, and contribute to the very landscapes of the Anthropocene.

Here in this article we are reporting six newly prepared di- and tri-organotin(IV) complexes derived from 2-(2((4-bromo-2-methylphenyl)amino)-2-oxoethoxy)acetic acid that were characterized by the FT-IR, 1H & 13CNMR, CHN analyses and single crystal X-ray crystallography. The solution state geometry obtained from NMR data using coupling constants (1J[119Sn-1H] and 2J[119Sn-13C]) as well as C-Sn-C angle indicate the 5- and 6-coordination environment around the Sn center for tri- and di-organotin(IV) complexes, respectively. The X-ray crystallographic data of complexes 1 and 3 revealed a five-coordinated distorted trigonal bipyramidal geometry with monodentate behavior of the carboxylate ligand. The solid state FT-IR data also confirm of monodentate nature of the carboxylate moiety for the triorganotin(IV) derivatives (1-3) and bidentate for the diorganotin(IV) derivatives (3-6). The HOMO-LUMO study indicates that an intermolecular charge transfer behavior is observed in the screened compounds. The higher ionization energy (6.61-6.74 eV) and smaller electron affinity values (0.74-0.97 eV) of HL and complexes 1-6, demonstrate their significant thermal stability and their ability to attract electrons. The total reducing power for complex 3 was maximum while the total antioxidant capacity for complexes 2 and 5 was highest among the studied compounds. Complex 6 has the highest % scavenging activity against DPPH. Complex 2 has shown maximum hemolysis of 78.69 among the tested compounds. Based on the achieved results, this study provides new insights for further development of organotin derivative as potential drug candidates.

The fabrication of an extremely productive, inexpensive and prominent electrocatalyst is required to improve the slow oxygen evolution reaction (OER). Here, a hydrothermal approach was utilized to fabricate Er2O3/ZnS composite as a competent electrode material for the purpose of efficient water splitting. The various analytical tools were used to evaluate morphology, crystallinity, functionality, surface area, and thermal stability of the reported materials. The large surface area of the Er2O3/ZnS composite (61.06 m(2 )g(-1)), makes it a suitable candidate for carrying out the OER process. Moreover, the electrochemical study for Er2O3/ZnS composite was conducted on nickel foam (NF) as a substrate to determine the electrolytic nature. The electrochemical study showed that the synthesized composite responds to an impressive overpotential (260 mV) and low Tafel value (40 mV dec(-1)) at an ideal current density (j) of 10 mA cm(-2). The Er2O3/ZnS composite exhibits a reduced onset potential of approximately 1.31 V and exceptional durability of about 30 h. The electrochemical observation suggests that incorporating Er2O3 into ZnS resulted in an enlarged surface area and enhanced active regions which reduce the resistance and promote the rapid binding of electrolyte ions. The composite (Er2O3/ZnS) developed by this approach can be utilized in various energy conversion and storage applications.

Transition metal oxides are promising for hydrogen evolution reaction (HER) and hybrid energy storage due to their excellent redox properties, inherent electrochemical activity, and abundant electroactive sites. A significant challenge limiting their broader application is their intrinsic low electrical conductivity and reduced electrochemical stability. For hybrid energy storage devices and HER, a highly electrochemical active material is designed from 2D graphitic carbon nitride nanosheet (g-C3N4) networks anchored with strontium tungstate nanospheres (SrWO4/g-C3N4). The excellent performance observed can be attributed to several factors: multiple electro-active sites, well-defined electronic structures, and interaction between SrWO4 nanosphere on the surface of g-C3N4 nanosheets surface. The supercapattery device exhibited superior energy density (65.4 W h/kg) and power density (1240.5 W/kg) in comparison. In addition, the theoretical technique was utilized to provide a detailed analysis of the experimental findings. In addition, the SrWO4/g-C3N4 material demonstrates a low overpotential of 129 mV at -10 mA/cm2, along with Tafel slope values of 67 mV/dec for the HER, and it exhibits excellent cyclic stability. This study presents an advanced method for designing SrWO4/g-C3N4-based supercapacitors and HER platforms with nanoscale structures and optimized interface arrangements.

Transition-metal oxides are attracting significant interest as potential energy storage materials and electrochemical sensors for hydroquinone (HQ) detection due to their exceptional redox properties, electrochemical activity, and abundance of electroactive sites. However, their practical application is hindered by challenges such as limited electrochemical stability and electrical conductivity, which restrict their economic viability. A sensitive sensor is developed featuring 2D g-C3N4 nanosheet networks decorated with strontium manganite nanoparticles, referred to as SrMnO3/g-C3N4, for applications in supercapacitors and electrochemical sensing. The designed hybrid-type devices exhibit a energy density of 84.8 Wh/kg and a power density of 1190.3 W/kg while maintaining robust stability over 10,000 cycles with a capacitive retention of 86 % and a coulombic efficiency of 95 %. Dunn's model clarifies the faradaic and non-faradic contributions in the fabricated device, demonstrating how its capacitive and diffusive contributions relate to the scan rate. The fabricated sensing device is used for the electrochemical detection of HQ. The SrMnO3/g-C3N4-modified GCE demonstrates enhanced performance, with a low limit of detection (LOD) of 6.32 mu M over a broad linear range of 1-600 mu M. Furthermore, the SrMnO3/g-C3N4-modified electrode shows high sensitivity, achieving a 0.214 mu A mu M- 1 cm- 2 value. The sensor proves its practicality and recovery performance through real sample wastewater and tap water analysis.