Adsorption Of Br Research Articles

Insights into Adsorption Behavior and Mechanism of Br- onto Nickel-Aluminum Layered Double Hydroxides Intercalated with Different Inorganic Anions.

Layered double hydroxides (LDHs) have garnered significant attention from researchers in the field of adsorption due to their unique laminated structures and ion exchange properties. LDHs with various anion intercalation showed different adsorption effects on adsorbing ions, but the corresponding adsorption mechanisms are ambiguous. In this study, three types of NiAl-LDHs were synthesized, utilizing NO3-, CO32-, or Cl- as the interlayer anions. Batch tests were conducted to study their adsorption performances for Br-. Among them, the LDH with a NO3- intercalation layer exhibited the highest adsorption capacity for Br-, reaching up to 1.40 mmol g-1. The adsorption kinetics, mechanism, and renewability of these NiAl-LDHs were systematically compared. As a result, the type of Br- adsorption by all three materials was single molecular layer chemisorption. Moreover, the thermodynamic results of adsorption suggested that the adsorption of Br- was a spontaneous exothermic process. X-ray photoelectron spectroscopy, X-ray diffraction, and point of zero charge analysis collectively indicated that the adsorption of Br- by LDHs primarily occurred through interlayer ion exchange and electrostatic interactions. Structural characterizations of the adsorbents revealed that Br- entered the interlayers of the three LDHs, causing varying degrees of reduction in the interlayer spacing. Density functional theory calculations indicated that the interlayer binding energy of LDH with NO3- intercalation was the lowest, thereby making it more susceptible NO3- to be exchanged with Br-. Finally, the stability of the NiAl-LDHs was studied. The NiAl-LDHs retains a high removal efficiency of Br- even after 5 cycles of adsorption and desorption.

Oxygen vacancies rich polyoxometalate for haloperoxidase mimic involved antibiofouling on self-provided H2O2 from photocatalysis

Biofouling significantly impacts marine environments and economies through pollution and economic loss. Artificial nanozymes, resembling haloperoxidase, are highly effective in combating biofouling due to their ability to facilitate the conversion of Br− to HBrO, thereby inhibiting the survival and proliferation of microorganisms. However, this process necessitates the presence of H2O2. To achieve haloperoxidase mimicry in biofouling prevention without external H2O2, a bifunctional polyoxometalate (POM) with abundant oxygen vacancies has been developed. This compound simultaneously exhibits haloperoxidase mimicry and photocatalytic H2O2 generation. Theoretical analyses suggest that oxygen vacancies elevate the d-band center, improving the adsorption of H2O2 and Br-, and thus enhancing haloperoxidase mimicry. The POM compound demonstrates notable H2O2 production capabilities, with a rate of 1.77 mmol·h−1·g−1, attributed to oxygen vacancies facilitating electron-hole pair separation. This advancement allows for haloperoxidase mimic biofouling prevention without the need for added H2O2. This study not only elucidates the structure–activity relationship in haloperoxidase mimicry and photocatalytic H2O2 production but also presents an effective and eco-friendly method for biofouling prevention.

Surface and Interface Engineering for Highly Stable CsPbBr3/ZnS Core/Shell Nanocrystals.

Shelling with chalcogenides on the surface of lead halide perovskite (LHP) nanocrystals (NCs) is believed to be an effective approach to increase their stability under high-moisture/aqueous conditions, which is important for LHP NC-based optoelectronic devices. However, it is still a challenge to prepare high-quality LHP/chalcogenide core/shell NCs with moisture/aqueous stability. In this work, a surface-defect-induced strategy is carried out to facilitate the adsorption of Br- ions and subsequently Zn2+ ions to preform a bipolar surface, which reduces the energy barrier at the CsPbBr3/ZnS interface and promotes the epitaxial growth of the ZnS shell layer. The aqueous stability of the as-received NCs shows an increase of over 12 times compared to that of the original one. Likewise, Mn2+ ions are introduced to further reduce the geometric symmetry mismatch and defect density at the CsPbBr3/ZnS interface. Interestingly, aqueous stability characterizations illustrate negligible degradation even after 230 min of ultrasonication, suggesting their outstanding stability. This work proposes an effective approach to prepare high-quality LHP/chalcogenide core/shell NCs, which possess great potential in the fabrication of stable optoelectronic devices.

Membrane-Free Electrosynthesis of Epichlorohydrins Mediated by Bromine Radicals over Nanotips.

The industrial manufacture of epichlorohydrin (ECH) often suffers from excessive corrosive chlorine and multistep processes. Here, we report a one-pot membrane-free Br radical-mediated ECH electrosynthesis. Bromine radicals electro-oxidized from Br- ions initiate the reaction and then eliminate HBr from bromohydrin to give ECH and release Br- ions for reuse. A high energy barrier for *OH oxidation and isolated Br adsorption sites enables NiCo2O4 to suppress the competitive oxygen and bromine evolution reactions. The high-curvature nanotips with an increased electric field concentrate Br- and OH- ions to accelerate ECH electrosynthesis. This strategy delivers ECH with a Faradaic efficiency of 47% and a reaction rate of 1.4 mol h-1 gcat-1 at a high current density of 100 mA cm-2, exceeding the profitable target from the techno-economic analysis. Economically profitable electrosynthesis, methodological universality, and the extended synthesis of epoxide-drug blocks highlight their promising potential.

Fe-doped Zr-based metal-organic frameworks for efficient bromide ion capture: Adsorption performance and mechanism

The efficient recovery of bromide ions (Br−) from aqueous solutions can alleviate the shortage of bromide resources and holds significant practical value. In this work, a Fe-doped Zr-based metal-organic framework (Fe-MOF-808) was successfully prepared, demonstrating remarkable efficacy in the high-capacity adsorption of Br−. The incorporation of Fe leads to reduction in particle size, elevation of specific surface area, and defect-rich structure, allowing Fe-MOF-808 to quickly adsorb Br−, and the adsorption process follows the Langmuir isotherm and pseudo-second-order kinetic model. Notably, under the conditions of an initial Br− concentration of 100 mg/L, 298 K and pH of 7, Fe-MOF-808 demonstrates exceptional adsorption capacity for Br− (247 mg/g), surpassing that of the pristine MOF-808 and the majority of previously reported adsorbents. Additionally, insights derived from Fourier transform infrared spectrometer (FT-IR), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations elucidate the Br− adsorption mechanism on Fe-MOF-808, which can be attributed to the robust interaction between M-OH (M = Zr, Fe) groups and Br−, enhanced electron transfer behavior subsequent to iron modification, and ligand exchange processes. In summary, Fe-MOF-808 emerges as an efficient adsorbent for capturing Br− from aqueous solution, providing a novel approach for the design of advanced Br− adsorbents.

Experimental investigation of anti-corrosive behaviour of Beta vulgaris: A green approach

The loss of metals due to corrosion can be prevented using green inhibitors. Using natural and eco-friendly plant products is futuristic, preventing the environment from toxic and harmful chemicals. The present study aimed to investigate whole beetroot (BR, Beta vulgaris) for its anti-corrosion behaviour by galvanostatic polarization and electrochemical impedance techniques at a temperature between 298 K- 328 K. The temperature study would help in proposing BR's adsorption mechanism on metal surfaces. The maximum inhibition efficiency of 94% at 298 K for 5% BR was observed, whereas a minimum of 75% was obtained for 1% BR at 328 K. It was found to be a mixed-type inhibitor that followed Langmuir isotherm. From thermodynamic studies, ΔGoads was found to be -13.64 kJ/mol, which revealed that BR adsorbed physically on the surface of mild steel. Rct values increased while Cdl values decreased on exposure of metal surface with BR extract. The scanning electron micrographs (SEM) and atomic force micrographs (AFM) witnessed the formation of a protective layer on the mild steel surface, which served as a barrier between the metal and corrosive medium. The present study provides a remedy for the financial and structural losses due to metal corrosion in an acidic medium.

Atomic structure and peculiarities of the electronic properties of Br layers on Ag(111) at different coverages

The structure and electronic properties of Br layers on Ag(111) at different coverage were studied by low-temperature scanning tunnelling microscopy, scanning tunnelling spectroscopy (STS) and density functional theory (DFT) calculations. The Br layers are found to form a hexagonal (3×3)R30∘ structure for coverage ⁓ 0.3 monolayer (ML) and a striped (61−12) structure for coverage ⁓ 0.4 ML. STS measurements reveal suppressed differential conductance for both structures at voltages ranging between − 1.2 and 1.4 V, and surprisingly intense peaks at 1.5 V and 2.0 V. The position of the high-intensity peak in the spectra for the striped structure shows lateral variations within the unit cell and is determined by the Br coverage. In our structural model for the striped structure, supported by DFT calculations, the hexagonal (3×3)R30∘ structure transforms to the striped structure due to uniaxial inhomogeneous compression of Br atomic rows. The local work function for the Br/Ag(111) surface, estimated from dz/dV(V) measurements, is 5.0 ± 0.2 eV, which is higher than for the Ag(111) surface (4.4 ± 0.1 eV). This suggests an increase in the electrostatic dipole barrier on Ag(111) due to Br adsorption. Combined with the suppressed local density of states around the Fermi level observed by STS, these results clarify the usefulness of Br layers in reducing the coupling between Ag(111) electrons and adsorbates.

Quantum mechanical survey on the electronic sensitivity of aluminium phosphide monolayer toward halogen gases

ABSTRACT Density functional theory computations were undertaken to scrutinise the adsorption of gasses N2, O2, F2, Cl2 and Br2 on an AlP nano-sheet (AlPNS). N2, O2, F2 and Cl2 released an adsorption energy of 3.1, 3.5, 5.3, 7.3 and 12.1 kcal/mol, respectively, as they approached the AIPNS, demonstrating a physisorption. In addition, there were no dramatic changes in the electronic properties of the AIPNS. Br2 released an adsorption energy of 23.1 kcal/mol as it approached the AIPNS. According to the electronic analysis, there was a reduction in the energy of the HOMO–LUMO gap from 2.62 to 1.76 eV (∼ −32.8%) after the adsorption of Br2, leading to a considerable rise in the electrical conductance. Hence, the AlPNS was capable of generating electrical signals as the Br2 molecules approached, which suggests that it is a promising sensor. Moreover, the AIPNS was capable of selectively detecting Br2 among the gas molecules mentioned above. The recovery time when Br2 was desorbed from the surface of the AIPNS was 6.8 s, which was short.

Originating Point of Traveling Waves on a Spherical Field Dependent on the Nature of Substrate Surface

The Belousov–Zhabotinsky (BZ) reaction was investigated to understand how the direction of traveling waves (TWs) is determined in a spherical field. A cation-exchange resin bead loaded with the catalyst of the BZ reaction was placed on a glass plate coated with silicone greases with different surface densities. TWs were generated at the contact point between the bead and glass plate for a lower density silicone grease, and at the upper half of the bead for a higher density silicone grease. In addition, TWs were generated in the middle section of the bead, which was sandwiched between two parallel glass plates coated with a high-density silicone grease. The experimental results were qualitatively reproduced by numerical calculations. These results are discussed in relation to the adsorption of Br2 into the silicone grease as the source of the inhibitor.

Influence of capillary condensation on the adsorption of Br2 in flue gas using a super-fine polyester fiber as adsorbent

Br2 is the major speciation of Br in flue gas from the combustion of materials containing Br. The route for the recycling of this resource must be highly efficient, which could achieve maximum environmental protection with sound economics.In the present work, adsorption experiments of Br2 in simulated flue gas with a super-fine polyester fiber as adsorbent (SPFa) were conducted by using a lab-scale fixed bed system, and the real-time adsorbance was continuously monitored. The influence of operating condition and water vapor in flue gas on adsorption efficiency was systematically investigated. SPFa displays exceptional selectivity and remarkable adsorption capability at minimal running cost. At low or sufficiently high Br2 concentration (CBr2), capillary condensation dramatically promotes the adsorption rate and equilibrium adsorbance (me). With mid-range CBr2, at the later stage, the adsorption rate shows reduction, and me shows subtle reduction/minimal increment because of the influence of capillary condensation on the internal diffusion of Br2. The adsorbent retains a considerable amount of adsorption capacity after the penetration of the bed. The water vapor has no competition with Br2 to develop capillary condensation, in which the low molar density of Br2 has a significant contribution. Based on the results, measures to improve the working efficiency of adsorption devices are proposed.

Fabrication of Polyaniline/Graphene Oxide Nanosheet@ Tea Waste Granules Adsorbent for Groundwater Purification.

The reuse and separation of nanomaterials from an aquatic solution is always challenging and may cause nanotoxicity if not separated completely. Nanomaterial immobilization on the surface of a macro-size material could be an effective approach to developing an efficient composite for groundwater purification. Herein, polyaniline and graphene oxide nanosheet immobilized granular tea waste (PANI/GO@GTW) has been synthesized to remove the anionic and cationic contaminants from groundwater. The synthesized materials were characterized by SEM, XRD, XPS, and FTIR spectroscopies. The optimization of experimental conditions was tested for bromide (Br-) removal from synthetic water. The results revealed that Br- adsorption behavior onto the synthesized materials was as follows: PANI/GO < PANI/GTW < PANI < PANI/GO@GTW. The optimum removal of Br- ions was observed at pH 3 with 90 min of saturation time. Br- adsorption onto PANI/GO@GTW followed the pseudo-first-order kinetic and Langmuir isotherm model, and electrostatic interaction was involved in the adsorption process. The optimum adsorption of Br- onto PANI/GO@GTW was found to be 26.80 m/g. The application of PANI/GO@GTW on real groundwater treatment demonstrated the effective removal of anion pollutants such as F-, Cl-, Br-, NO3-, and PO43-. This study revealed that PANI/GO@GTW successfully reduced Br- concentrations in synthetic and real groundwater and can be used for large-scale applications.

In‐situ Synthesis of CsPbBr 3 Nanocrystals/Polyvinyl Pyrrolidone Ethanol Sol and High Resolution Fingerprint Identification

This article provides a remarkably simple strategy to successfully prepare CsPbBr3 nanocrystals/ethanol sol with relatively high stability by the synergistic effect of polyvinylpyrrolidone and trace water. By adding alcohol-soluble thermoplastic acrylic resin, the fingerprint identification films can be simply and quickly prepared, which can clearly emerge the three-level structure of fingerprint.

Controllable synthesis of porous silicate@carbon heterogeneous composite from Coal Gangue waste as eco-friendly superior scavenger of dyes

Converting naturally abundant Coal Gangue (CG) waste into new materials with special functions or excellent performance has always been desirable. Here, the new porous heterogeneous silicate@carbon composites with high specific surface area of 650.96 m 2 /g (52.88 times of CG), excellent adsorption and removal ability to cationic dyes were synthesized by a controllable one-pot reconstitution reaction process of calcined CG. The optimal composite adsorbent composed of 10.179% Mg and 0.35% carbon can adsorb 269.86 mg/g of Methylene blue (MB) and 504.91 mg/g of Basic Red 14 (BR), which are 29.2 and 28.6 times higher than that of original CG and calcined CG, respectively. The MB and BR dyes in 200 mg/L of the initial dye solution can be removed almost completely after adsorption with 2 g/L of the composite adsorbent, which is significantly superior to raw CG and calcined CG. The dynamic column adsorption curves indicate the adsorption equilibrium was attained at C / C 0 values of 0.78 (for MB adsorption) and 0.75 (for BR adsorption). The used adsorbent can be regenerated and reused for multiple cycles, and the removal efficiency of the adsorbent towards dye is still higher than 90% after 5 regenerations. The adsorption isotherms and adsorption kinetics were studied and the adsorption mechanism was explored. This study demonstrates a feasible way to achieve a sustainable cycle "from waste to environmental purification materials". • Coal Gangue (CG) was converted to synthesize new porous silicate composite adsorbent. • The specific surface area of the adsorbent (650.96 m 2 /g) reaches 52.88 folds of CG. • The adsorbent adsorb 269.86 mg/g of MB and 504.91 mg/g of ABR dye (over 28.6 folds of CG). • Dyes in 200 mg/L of initial solution were almost completely removed by the adsorbent. • The adsorbent shows excellent dye removal efficiency in a dynamic adsorption process.

Understanding the pitting mechanism of super ferritic stainless steel in bromide solutions: The role of Ti/Nb–Mo precipitates with a core–shell structure

The core–shell structure of Ti/Nb precipitates in UNS S44660 was revealed by focused ion beam–transmission electron microscopy (FIB–TEM). In the bromide solution, the Nb in the shell is preferentially and selectively eluted, leaving a micro-crevice. The combined effect of the strong anodic adsorption of Br− and the large strain field in the shell promotes the free dissolution of residual Mo. Micro-crevices surround the Ti-rich nucleus and expand into pits. Consequently, pitting preferentially initiates at the Ti/Nb precipitates, which was verified by scratching electrode tests and immersion tests in bromide solutions.

Anisotropic growth of gold nanocrystals induced by concerted adsorption using a photochemical approach

Photochemical reduction of noble metal ions in the presence of stabilizers that selectively adsorb on different crystal planes is a fascinating method for synthesizing shape-controlled metal nanocrystals (NCs). In this study, we demonstrate the photoreduction of Au3+ ions in the presence of polyvinylpyrrolidone (PVP) and Br− ions, that are classified into different categories of protective agents. Au nanoplates with atomically flat surfaces are obtained by the photoirradiation of an aqueous solution containing Au3+, PVP and Br−. Notably, PVP preferentially adsorbs along the perimeter, while Br− ions tend to adsorb on the flat top and bottom (111) faces. The selective adsorption of these structurally distinct stabilizers promotes two-dimensional growth of the Au nanoplates. PVP serves not only as a protective agent but also as a reduction agent in the photoreduction process. At high concentrations of Br− ions, the adsorption of the Br− ions also occurs at the perimeter, which kinetically traps the side growth of the nanoplates and leads to the formation of polygonal Au nanoplates. In other words, competitive adsorption of PVP and Br− at the facets and their density kinetically affect the shape of the formed Au NCs. This concept was successfully applied to control the photoreduction of Au3+ ions into icosahedral Au nanoparticles.

Theoretical investigation of Br2 and Cl2 detection by the pristine and Co-doped graphyne

The Br2 and Cl2 interaction with the intrinsic and Co-doped graphyne nanosheets has been explored by density functional theory calculations. Two vertical and parallel configurations were identified for Br2 and Cl2 adsorption. Calculations showed that the adsorption of Br2 was stronger than Cl2 on the graphyne nanosheet. Neither Br2 nor Cl2 could make serious changes to the HOMO–LUMO gap (Eg) and electrical resistance of pristine sheet. By manipulating the structure of pristine graphyne by Co atom, its reactivity and sensitivity dramatically improved toward Br2 and Cl2 gases. Compared to the Cl2, the Br2 much more decreases the electrical resistance and Eg of the Co-doped graphyne (~ −40.25%). Thus, the Co-doped graphyne may selectively recognize the Br2 gas in the presence of Cl2. The computed recovery time value for Br2 from the surface of the Co-doped graphyne is 36.4 s, which shows that the graphyne, as a sensor, benefits from a short recovery time to detect Br2.

Defect-controlled halogenating properties of lanthanide-doped ceria nanozymes.

Marine organisms combat bacterial colonization by biohalogenation of signaling compounds that interfere with bacterial communication. These reactions are catalyzed by haloperoxidase enzymes, whose activity can be emulated by nanoceria using milli- and micromolar concentrations of Br- and H2O2. We show that the haloperoxidase-like activity of nanoceria can greatly be enhanced by Ln substitution in Ce1-xLnxO2-x/2. Non-agglomerated nanosized Ce1-xLnxO2-x/2 (Ln = Pr, Tb, particle size < 10 nm) was prepared mechanochemically from CeCl3 and Na2CO3 followed by short calcination. Lanthanide metals could be incorporated into the CeO2 host without solubility limit, as shown for Tb. The distribution of the Ln3+ defect sites in the CeO2 host structure was analyzed by electron spin resonance spectroscopy. Ce3+ and superoxide O2- species are present at surface sites. Their formation is promoted by increasing dopant concentration. Ce1-xLnxO2-x/2 was prepared in copious amounts by ball-milling. This energy-saving and residue-free method can be upscaled to industrial scale. The surface defect chemistry of Ce1-xLnxO2-x/2 was unravelled by vibrational spectroscopy. It is associated with the mechanochemical preparation and leads to enhanced catalytic activity. Although Ce0.9Pr0.1O1.95 had a lower BET surface area than pure CeO2, its catalytic activity, calibrated by oxidative bromination of phenol red, was much higher because the ζ-potential increased from 15 mV (for CeO2) to 30 mV (for Ce0.9Pr0.1O1.95). This facilitates adsorption of Br- in aqueous conditions and explains the high catalytic activity of the Ln-substituted CeO2. Ce1-xLnxO2-x/2 is an effective and "green" nanoparticle haloperoxidase mimic for antifouling applications, as no chemicals other than the ubiquitous Br- and H2O2 (generated in daylight) are required, and only natural metabolites are released into the environment.

The Role of Graphene Monolayers in Enhancing the Yield of Bacteriorhodopsin Photostates for Optical Memory Applications

Bacteriorhodopsin (bR) is a photoactive protein that has gained increasing importance as a tool for optical memory storage due to its remarkable photochemical and thermal stability. The two stable photostates (bR and Q) obtained during the bR photocycle are appropriate to designate the binary bit 0 and 1, respectively. Such devices, however, have limited success due to a low quantum yield of the Q state. Many studies have used genetic and chemical modification as optimization strategies to increase the yield of the Q state. Nonetheless, this compromises the overall photochemical stability of bR. This paper introduces a unique way of stabilizing the conformations of bacteriorhodopsin and, thereby, the bR and Q photostates through adsorption onto graphene. All-atom molecular dynamics (MD) simulations with NAMD and CHARMM force fields have been used here to understand the interactive events at the interface of the retinal chromophore within bR and a single-layer graphene sheet. Based on the stable RMSD (~4.5 Å), secondary structure, interactive van der Waals energies (~3000 kcal/mol) and electrostatic energies (~2000 kcal/mol), it is found that the adsorption of bR onto graphene can stabilize its photochemical behavior. Furthermore, the optimal adsorption distance for bR is found to be ~4.25 Å from the surface of graphene, which is regulated by a number of interfacial water molecules and their hydrogen bonds. The conformations of the key amino acids around the retinal chromophore that are responsible for the proton transport are also found to be dependent on the adsorption of bR onto graphene. The quantity and lifetime of the salt bridges also indicate that more salt bridges were formed in the absence of graphene, whereas more were broken in the presence of it due to conformational changes. Finally, the analysis on the retinal dihedrals (C11 = C12-C13 = C14, C12-C13 = C14-C15, C13 = C14-C15 = NZ and C14-C15 = NZ-CE) show that bacteriorhodopsin in the presence of graphene exhibits increased stability and larger dihedral energy values.

DFT calculations on selectivity enhancement by Br addition on Pd catalysts in the direct synthesis of hydrogen peroxide

Although the direct synthesis of hydrogen peroxide (DSHP) is a potential alternative to the current anthraquinone auto-oxidation process, the low H2O2 selectivity of the former presents a major challenge. Previous studies have reported that the addition of halides improves the H2O2 selectivity of Pd-based catalysts. In this study, the H2O2 selectivity of Pd/SiO2 and PdBrx/SiO2 catalysts was observed to increase with the Br content. Furthermore, density functional theory (DFT) calculations on clean and Br-adsorbed Pd (1 1 1), (1 0 0), and (2 1 1) surfaces confirmed that the activation energies of the side reactions on the Pd (1 1 1) surface increased slightly after Br adsorption, whereas those of the main reactions were less affected. The repulsion between Br and O on the Pd (1 0 0) surface increased the O2 dissociation barrier by changing reaction configurations. Considering that the Pd (1 0 0) surface adsorbed O2 more strongly than did the Pd (1 1 1) surface, inhibiting O2 dissociation on the Pd (1 0 0) surface improved the H2O2 selectivity of PdBrx/SiO2 catalysts. On the Pd (2 1 1) surface, Br blocked an edge site and induced the reactions on the Pd (1 1 1) surface. In conclusion, DFT calculation confirmed that the repulsion and site blocking by adsorbed Br improved the H2O2 selectivity of PdBrx/SiO2 catalysts.

Syntheses, structures and Br2 uptake of Cu(I)-bipyrazole frameworks

A novel metal-organic framework [CuCN(TMBP)·H2O]n (TCuCN) has been synthesized by the reaction of 3,3′,5,5′-tetramethyl-4,4′-bipyrazole (TMBP) and CuCN. Its structure was determined by single-crystal X-ray diffraction (SCXRD) analysis and further characterized by power X-ray diffraction (PXRD) analysis, FT-IR spectroscopy and thermogravimetric (TG) analysis. Previously reported structurally analogous TCuCl, TCuBr, TCuI have also been synthesized for Br2 adsorption comparison. All of these four MOFs exhibited reversible uptake of Br2 vapor judging by the unchanged PXRD patterns. Among four MOFs, Br2-loaded TCuI showed the most uptake amount of Br2 (15.7 ​wt%), providing the formula to be TCuI·0.33Br2. The different uptake amount of Br2 for TCuX (X ​= ​CN, Cl, Br, I) should be mainly ascribed to the intermolecular interaction between CuX and Br2.