TiO₂/UV-A 시스템을 이용한 Cu(II)-EDTA의 광촉매 산화반응에서 TiO₂ 재사용 및 회수

이승목,Lee, Seung-Mok 한국물환경학회 2005 한국물환경학회지 Vol.21 No.1

$TiO_2-catalyst$ suspensions work efficiently in Photocatalytic oxidation (PCO) for wastewater treatment. Nevertheless, once photocatalysis is completed, separation of the catalyst from solution becomes the main problem. The PCO of Cu(II)-EDTA was studied to determine the reusability of the titanium dioxide catalyst. Aqueous solutions of $10^{-4}M$ Cu(II)-EDTA were treated using illuminated $TiO_2$ particles at pH 6 in a circulating reactor. $TiO_2$ was reused in PCO system for treatment of Cu(II)-EDTA comparing two procedures: reuse of water and $TiO_2$ and reuse of the entire suspension after PCO of Cu(II)-EDTA. The results are as follows; (i) Photocatalytic efficiency worsens with successive runs when catalyst and water are reused without separation and filtration, whereas, when $TiO_2$ is separated from water, the reused $TiO_2$ is not deactivated. (ii) The $TiO_2$ mean recovery (%) with reused $TiO_2$ was 86.4%(1.73g/L). Although the mean initial degradation rate of Cu(II)-EDTA and Cu(II) was lower than that using fresh $TiO_2$, there was no significant change in the rate during the course of the three-trial experiment. It is suggested that Cu(II)-EDTA could be effectively treated using an recycling procedure of PCO and catalyst recovery. (iii) However, without $TiO_2$ separation, the loss of efficiency of the PCO in the use of water and $TiO_2$ due to Cu(II), DOC remained from previous degradation and Cu(II)-EDTA added to the same suspension was observed after 2 trials, and resulted in the inhibition of the Cu(II)-EDTA, Cu(II) and DOC destruction.

ZnO/Cu₂O-decorated rGO: Heterojunction photoelectrode with improved solar water splitting performance

Hou, Tian-Feng,Shanmugasundaram, Arunkumar,Hassan, Mostafa Afifi,Johar, Muhammad Ali,Ryu, Sang-Wan,Lee, Dong-Weon Pergamon Press 2019 International journal of hydrogen energy Vol.44 No.35

<P><B>Abstract</B></P> <P>In present work, we report a facile fabrication process to improve the photoelectrochemical (PEC) performance of ZnO-based photoelectrodes. In order to achieve that, the Cu<SUB>2</SUB>O nanocubes are cathodic-deposited on the as-prepared ZnO nanorods. Then rGO nanosheets are electrodeposited on the ZnO/Cu<SUB>2</SUB>O heterostructures. The fabricated photoelectrodes are systematically studied in detail by different characterization techniques such as powder X-ray diffraction, micro-Raman, X-ray photoelectron spectroscopy, ultraviolet diffused reflectance spectroscopy and photoluminescence spectroscopy analysis. Morphologies of the fabricated photoelectrodes are investigated through electron microscopy in scanning and transmission mode. To evaluate the PEC performance of the fabricated photoelectrodes, the line scan voltammetry (LSV) measurement is performed using a three-electrode system in 0.5-M Na<SUB>2</SUB>SO<SUB>4</SUB> electrolyte solution under stimulated light illumination at 100 mW/cm<SUP>2</SUP> from a 300-W Xenon Arc lamp coupled with an AM 1.5G filter using a three-electrode system. The photocurrent measurement demonstrates that the photoelectrodes based on ZnO/Cu<SUB>2</SUB>O/rGO possess enhanced PEC performance compared to the pristine ZnO and ZnO/Cu<SUB>2</SUB>O photoelectrodes. The photocurrent density of ZnO/Cu<SUB>2</SUB>O/rGO-15 photoelectrode (10.11 mA/cm<SUP>2</SUP>) is ∼9 and ∼3 times higher than the photoelectrodes based on pristine ZnO (1.06 mA/cm<SUP>2</SUP>) and ZnO/Cu<SUB>2</SUB>O (3.22 mA/cm<SUP>2</SUP>). The enhanced PEC performance of ZnO/Cu<SUB>2</SUB>O/rGO photoelectrode is attributed to the excellent light absorption properties of Cu<SUB>2</SUB>O and excellent catalytic and charge transport properties of rGO. Experimental results reveal that the proposed functional nanomaterials have a great potential in water splitting applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> rGO-protected ZnO/Cu<SUB>2</SUB>O heterojunction photoelectrodes for water splitting. </LI> <LI> Thickness of rGO on heterostructure controlled by electrochemical reduction time. </LI> <LI> Cu<SUB>2</SUB>O significantly enhances the light absorption for ZnO/Cu<SUB>2</SUB>O heterojunction. </LI> <LI> Super catalytic and charge transport properties of rGO improved the PEC performance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>The improved PEC performance of the ZnO/Cu<SUB>2</SUB>O/rGO hybrid photoelectrodes is attributed to (i) excellent crystalline nature of the as-prepared ZnO NRs and Cu<SUB>2</SUB>O nanocubes, (ii) large light absorption property of the Cu<SUB>2</SUB>O nanocubes, (iii) high electrical conduction effect and excellent charge transport property of the rGO nanosheets, (iv) electric effect induced by the heterojunction between the vertically aligned ZnO NRs, Cu<SUB>2</SUB>O nanocubes and rGO nanosheets (Scheme 2) and (v) excellent electron acceptor and passivation layer of rGO. All these factors coupled together contribute to the excellent PEC performance of ZnO/Cu<SUB>2</SUB>O/rGO hybrid based photoelectrodes.</P> <P>[DISPLAY OMISSION]</P>

Photocatalytic degradation of 4‐nitrophenol by using multicomponent Cu 2 O‐Cu@TiO 2 nanoparticl

Jiang Jianwei,문석영,윤성호,Piao Longhai 대한화학회 2024 Bulletin of the Korean Chemical Society Vol.45 No.4

Multicomponent nanomaterials with synergistic effect were typically used to enhance the photocatalytic performance. Herein, three‐component nanomaterials composed of Cu 2 O, Cu, and TiO 2 were prepared using a facile method, and applied in the photocatalytic degradation reactions. The synthetic procedure involves the formation of Cu 2 O nanoparticle aggregates (NPAs) followed by Cu nanoparticles growth on the surface of Cu 2 O NPAs in one pot, and TiO 2 encapsulation (Cu 2 O‐Cu@TiO 2 ). The catalyst structure was characterized by x‐ray diffraction, field emission‐scanning electron microscopy, transmission electron microscopy, and energy‐dispersed x‐ray. The catalytic performance of Cu 2 O‐Cu@TiO 2 NPAs was evaluated through the photocatalytic degradation of 4‐nitrophenol under the simulated solar light. We found that it exhibited greater activity than the Cu 2 O‐Cu NPAs, commercial TiO 2 , and Cu 2 O@TiO 2 NPAs, probably due to their synergistic interactions resulting in the effective photogenerated carrier transfer in the multicomponent nanomaterials. Multicomponent nanomaterials with synergistic effect were typically used to enhance the photocatalytic performance. Herein, three-component nanomaterials composed of Cu2O, Cu, and TiO2 were prepared using a facile method, and applied in the photocatalytic degradation reactions. The synthetic procedure involves the formation of Cu2O nanoparticle aggregates (NPAs) followed by Cu nanoparticles growth on the surface of Cu2O NPAs in one pot, and TiO2 encapsulation (Cu2O-Cu@TiO2). The catalyst structure was characterized by x-ray diffraction, field emission-scanning electron microscopy, transmission electron microscopy, and energy-dispersed x-ray. The catalytic performance of Cu2OCu@ TiO2 NPAs was evaluated through the photocatalytic degradation of 4-nitrophenol under the simulated solar light. We found that it exhibited greater activity than the Cu2O-Cu NPAs, commercial TiO2, and Cu2O@TiO2 NPAs, probably due to their synergistic interactions resulting in the effective photogenerated carrier transfer in the multicomponent nanomaterials.

표면 개질된 지지체를 이용한 Cu3(BTC)2 튜브형 분리막의 용매열 합성 및 특성분석

김진수 ( Jin Soo Kim ),노승준 ( Seung Jun Noh ) 한국화학공학회 2014 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.52 No.2

본 연구에서는 용매열합성법(solvothermal method)을 이용하여 매크로 기공의 알루미나 튜브 지지체 위에 나노기공Cu3(BTC)2 분리막을 제조하였다. In-situ 용매열합성법을 이용하는 경우, 매크로 기공의 알루미나 지지체 위에 균일한핵생성과 성장을 통해 연속적이고 균열이 없는 Cu3(BTC)2 층을 형성하기 어렵다. 본 연구에서는 용매열합성 전에 알루미나 지지체 표면을 200 oC로 가열한 상태에서 Cu 전구체 용액을 분무하여 지지체 표면을 개질한 후, 용매열합성법을 수행하여 연속적이고 균열이 없는 Cu3(BTC)2 튜브형 분리막을 제조할 수 있었다. 합성된 Cu3(BTC)2 분리막은 XRD,FE-SEM 및 기체투과 실험 등을 통해 분석하였다. 5 μm의 두께를 가진 Cu3(BTC)2 튜브형 분리막을 통한 단일기체 투과실험 결과, 80 oC에서 H2가 가지는 투과도는 7.8×10-7 mol/s·m2·Pa이고, H2/N2, H2/CO2의 이상선택도는 각각 11.94,12.82로 계산되었다. In this study, nanoporous Cu3(BTC)2 membranes were synthesized on macroporous alumina tube supports by solvothermal method. It is very difficult to prepare uniform and crack-free Cu3(BTC)2 layer on macroporous alumina support by in situ solvothermal method. In this study, continuous and crack-free Cu3(BTC)2 tubular membranes could be obtained by in situ solvothermal process after surface modification of alumina support. The surface modification was conducted by spraying Cu precursor solution on the alumina support heated at 200 oC. The prepared Cu3(BTC)2 tubul armembranes were characterized by XRD, FE-SEM and gas permeation experiments. H2 permeance through 5 μm thickCu3(BTC)2 tubular membrane was calculated to be 7.8×10-7 mol/s·m2·Pa by single gas permeation test, with the ideal selectivities of H2/N2=11.94, and H2/CO2=12.82.

Ar-N₂ 플라즈마가 Cu 표면에 미치는 구조적 특성 분석

박해성,김사라은경,Park, Hae-Sung,Kim, Sarah Eunkyung 한국마이크로전자및패키징학회 2018 마이크로전자 및 패키징학회지 Vol.25 No.4

Cu-Cu 웨이퍼 본딩 강도를 향상시키기 위한 Cu 박막의 표면처리 기술로 $Ar-N_2$ 플라즈마 처리 공정에 대해 연구하였다. $Ar-N_2$ 플라즈마 처리가 Cu 표면의 구조적 특성에 미치는 영향을 X선 회절분석법, X선 광전자 분광법, 원자간력현미경을 이용하여 분석하였다. Ar 가스는 플라즈마 점화 및 이온 충격에 의한 Cu 표면의 활성화에 사용되고, $N_2$ 가스는 패시베이션(passivation) 층을 형성하여 -O 또는 -OH와 같은 오염으로부터 Cu 표면을 보호하기 위한 목적으로 사용되었다. Ar 분압이 높은 플라즈마로 처리한 시험편은 표면이 활성화되어 공정 이후 더 많은 산화가 진행되었고, $N_2$ 분압이 높은 플라즈마 시험편에서는 Cu-N 및 Cu-O-N과 같은 패시베이션 층과 함께 상대적으로 낮은 수치의 산화도가 관찰되었다. 본 연구에서는 $Ar-N_2$ 플라즈마 처리가 Cu 표면에서 Cu-O 형성 억제 반응에 기여하는 것을 확인할 수 있었으나 추가 연구를 통하여 질소 패시베이션 층이 Cu 웨이퍼 전면에 형성되기 위한 플라즈마 가스 분압 최적화를 진행하고자 한다. The effect of $Ar-N_2$ plasma treatment on Cu surface as one of solutions to realize reliable Cu-Cu wafer bonding was investigated. Structural characteristic of $Ar-N_2$ plasma treated Cu surface were analyzed using X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscope. Ar gas was used for a plasma ignition and to activate Cu surface by ion bombardment, and $N_2$ gas was used to protect the Cu surface from contamination such as -O or -OH by forming a passivation layer. The Cu specimen under high Ar partial pressure plasma treatment showed more copper oxide due to the activation on Cu surface, while Cu surface after high $N_2$ gas partial pressure plasma treatment showed less copper oxide due to the formation of Cu-N or Cu-O-N passivation layer. It was confirmed that nitrogen plasma can prohibit Cu-O formation on Cu surface, but nitrogen partial pressure in the $Ar-N_2$ plasma should be optimized for the formation of nitrogen passivation layer on the entire surface of Cu wafer.

$Cu_2(OH)_3(CH_3COO){\cdot}H_2O$로 부터 마이크로파를 이용한 $Cu_2O$와 Cu의 합성

송하철,허영덕,Song, Ha-Chul,Huh, Young-Duk 한국결정성장학회 2006 한국결정성장학회지 Vol.16 No.4

[ $Cu_2O$ ] and Cu have been synthesized from the layered organic-inorganic hybrid, $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$, assisted by microwave irradiation. $Cu_2O$ is formed in aqueous glucose solution, while metallic Cu is formed in ethylene glycol by reduction of $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$. The influence of microwave irradiation time and concentration of glucose on $Cu_2O$ particles formation and growth has been examined. The morphologies of $Cu_2O$ particles change from spheres with a few fm size to nanowires with diameter of 40 nm as increasing the microwave irradiation times. 층상 구조의 유기-무기 복합 소재 $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$에 마이크로파를 조사하면서 $Cu_2O$와 Cu를 합성하였다. 에틸렌 글리콜에서는 $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$이 환원이 되어서 Cu금속이 형성되는 반면에, 수용액에 글루코오스를 넣으면$Cu_2(OH)_3(CH_3COO){\cdot}H_2O$이 환원이 되어 $Cu_2O$가 형성되었다. 마이크로파 조사시간과 글루코오스의 농도가 $Cu_2O$의 입자의 생성과 성장에 미치는 영향을 확인하였다. 마이크로파의 조사시간이 길어질수록 $Cu_2O$의 입자는 수 ${\mu}m$의 구형에서 40nm의 지름을 가진 나노 선으로 변함을 확인하였다.

Ar/N₂ 2단계 플라즈마 처리에 따른 저온 Cu-Cu 직접 접합부의 정량적 계면접착에너지 평가 및 분석

최성훈,김가희,서한결,김사라은경,박영배,Choi, Seonghun,Kim, Gahui,Seo, Hankyeol,Kim, Sarah Eunkyung,Park, Young-Bae 한국마이크로전자및패키징학회 2021 마이크로전자 및 패키징학회지 Vol.28 No.2

3 차원 패키징을 위한 저온 Cu-Cu직접 접합부의 계면접착에너지를 향상시키기 위해 Cu박막 표면에 대한 Ar/N₂ 2단계 플라즈마 처리 전, 후 Cu표면 및 접합계면에 대한 화학결합을 X-선 광전자 분광법(X-ray photoelectron spectroscopy)을 통해 정량화한 결과, 2단계 플라즈마 처리로 인해 Cu표면에 Cu₄N이 형성되어 Cu산화를 효과적으로 억제하는 것을 확인하였다. 2단계 플라즈마 처리하지 않은 Cu-Cu시편은 표면 산화막의 영향으로 접합이 제대로 되지 않았으나 2단계 플라즈마 처리한 시편은 효과적인 표면 산화방지효과로 인해 양호한 Cu-Cu접합을 형성하였다. Cu-Cu직접접합 계면의 정량적 계면접착에너지를 double cantilever beam 시험방법 및 4점 굽힘(4-point bending, 4-PB) 시험방법을 통해 비교한 결과, 각각 1.63±0.24, 2.33±0.67 J/m²으로 4-PB 시험의 계면접착에너지가 더 크게 측정되었다. 이는 계면파괴역학의 위상각(phase angle)에 따른 계면접착에너지 증가 거동으로 설명할 수 있는데 즉, 4-PB의 계면균열선단 전단응력성분 증가로 인한 계면거칠기의 효과에 기인한 것으로 판단된다. The effect of Ar/N₂ two-step plasma treatment on the quantitative interfacial adhesion energy of low temperature Cu-Cu bonding interface were systematically investigated. X-ray photoelectron spectroscopy analysis showed that Ar/N₂ 2-step plasma treatment has less copper oxide due to the formation of an effective Cu4N passivation layer. Quantitative measurements of interfacial adhesion energy of Cu-Cu bonding interface with Ar/N₂ 2-step plasma treatment were performed using a double cantilever beam (DCB) and 4-point bending (4-PB) test, where the measured values were 1.63±0.24 J/m² and 2.33±0.67 J/m², respectively. This can be explained by the increased interfacial adhesion energy according phase angle due to the effect of the higher interface roughness of 4-PB test than that of DCB test.

Sr₂Ru_1-xCu_xO_4-y(0.0≤x≤0.5) 화합물의 구조 및 전달 특성에 대한 연구

박중철,Park, Jung-Chul 대한화학회 2003 대한화학회지 Vol.47 No.6

고상반응으로 $Sr_2Ru_{1-x}Cu_xO_{4-y}(0.0{\le}x{\le}0.5)$ 화합물을 합성하였다. X-선 회절 분석 결과에 대한 Rietveld 정밀화로부터 합성된 $Sr_2Ru_{1-x}Cu_xO_{4-y}$ 화합물은 $0{\le}x{\le}0.30$의 Cu 치환 범위에서는 모두 단일상의 정방정계 구조를 갖는 $K_2NiF_4$ 형태의 구조를 취하지만, $0.4{\le}x{\le}0.5$의 범위에서는 미량의 $Sr_2CuO_3$ 화합물의 회절 피이크가 관찰되는 이중상을 갖는 화합물로 존재한다는 사실을 알 수 있었다. $Sr_2RuO_4$ 화합물의 Ru자리에 Cu 이온을 부분적으로 치환할 때의 전이금속 이온인, Ru와 Cu이온의 원자가 상태는 X-선 전자 분광법으로 확인하였다. $Ru\; 3p_{3/2}$ 전자와 $Cu\; 2p_{3/2}$ 전자의 결합에너지 측정으로부터 $Ru^{4+},\;Cu^{2+}$를 갖는 것으로 확인되었다. $Sr_2RuO_4$ 화합물의 Ru 자리에 치환하는 Cu 이온의 농도를 증가할수록 $Ru-O1({\times}4)$ 와 $Ru-O_2({\times}2$)의 결합길이 차이가 ${\Delta}=0.1329 {\AA}Sr_2RuO_4$ 경우)에서 ${\Delta}=0.0383 {\AA}(Sr_Ru_{0.7}Cu_{0.3}O_{4-y}$ 경우)으로 변하며, c/a 역시 감소하는 경향을 나타내고 있다. 따라서, $Sr_2RuO_4$ 화합물의 Ru 자리에 Cu 이온을 치환함에 따라 $RuO_6$ 팔면체의 국부 대칭성의 변화에 의해 결정구조가 정방정계로의 변화를 수반하면서, 이에 따른 $Sr_2Ru_{1-x}Cu_xO_{4-y}$의 전달특성이 금속에서 반도체로 변화한다. $Sr_2Ru_{1-x}Cu_xO_{4-y}(0.0{\le}x{\le}0.5)$ compounds were prepared using a conventional solid state reaction. Based on the Rietveld refinements of X-ray diffraction results, it is revealed that $Sr_2Ru_{1-x}Cu_xO_{4-y}$ compounds are the single phases with K2NiF4 type tetragonal system in the range of 0=x=0.3, while the mixed phases of$Sr_2RuO_4$ and $Sr_2CuO_3$ in the range of $0.4{\le}x{\le}0.5$. By means of X-ray photoelectron spectroscopy, the valence states of Ru and Cu in $Sr_2Ru_{1-x}Cu_xO_{4-y}$, have been confirmed to 4+ and 2+, respectively. The bond length difference between $Ru-O_1 ({\times}4)\;and\;Ru-O_2 ({\times}2)\;in\;RuO_6$ octahedron is gradually decreased with increasing Cu content in $Sr_2Ru_{1-x}Cu_xO_{4-y}$, which results in the lower c/a ratio. So, it might be assured that the variation of local symmetry of $RuO_6$ octahedron is very closely related to the transporting property of $Sr_2Ru_{1-x}Cu_xO_{4-y}$ compounds. The behavior of resistivity discloses that the metallic property in $Sr_2RuO_4$ changes into the semiconducting one in proportion to the Cu content in $Sr_2Ru_{1-x}Cu_xO_{4-y}$.

Growth of Cu₂S thin films by atomic layer deposition using Cu(dmamb)₂ and H₂S

Agbenyeke, Raphael Edem,Park, Bo Keun,Chung, Taek-Mo,Kim, Chang Gyoun,Han, Jeong Hwan Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.456 No.-

<P><B>Abstract</B></P> <P>In this study, atomic layer deposition (ALD) of Cu<SUB>2</SUB>S was explored using bis(dimethylamino-2-methyl-2-butoxy)copper(II) and 5% H<SUB>2</SUB>S combination as Cu and S sources, respectively. The reaction resulted in a high growth rate of ∼0.22–0.24 nm/cycle at 150–200 °C owing to the high reactivity of the Cu precursor. At all investigated temperatures, Cu<SUB>2</SUB>S films with Cu oxidation state of +1 were obtained with negligible impurity levels. It was revealed that stoichiometric Cu<SUB>2</SUB>S films could be deposited at 120–150 °C, while sulfur deficient films was formed at 200 °C. Cu<SUB>2</SUB>S ALD process at low temperatures of 100–120 °C resulted in continuous film formation while the higher deposition temperatures of >150 °C led to island formation. Cu<SUB>2</SUB>S films showed p-type electrical characteristic with high hole concentrations of 4 × 10<SUP>19</SUP>–10<SUP>21</SUP> cm<SUP>−3</SUP> and Hall mobility of 2 cm<SUP>2</SUP>/vs. Lastly, the as-deposited Cu<SUB>2</SUB>S films exhibited an optical band gap of 1.2 eV which widened upon prolonged surface oxidation and in addition displayed NIR intra-band absorption.</P> <P><B>Highlights</B></P> <P> <UL> <LI> High growth rate and impurity free Cu<SUB>2−x</SUB>S ALD process was developed using a new precursor combination of bis(dimethylamino-2-methyl-2-butoxy)Cu(II) and H<SUB>2</SUB>S at 120–200 °C. </LI> <LI> Stoichiometric Cu<SUB>2</SUB>S films were deposited at 120–150 °C, while sulfur deficient Cu<SUB>2−x</SUB>S film was formed at 200 °C. </LI> <LI> Cu<SUB>2</SUB>S films showed p-type characteristics with high carrier concentrations and mobility of 4 × 10<SUP>19</SUP>–10<SUP>21</SUP> cm<SUP>−3</SUP> and 2 cm<SUP>2</SUP>/Vs, respectively. </LI> <LI> As deposited Cu<SUB>2</SUB>S films showed an optical band gap of 1.2 eV which widened after prolonged air exposure and in addition exhibited increased near infrared intra-band absorption. </LI> </UL> </P>

Enhanced CO2/N2 separation performance in HP-Cu-BTCs by modifying the open-metal sites and porosity using added templates

Ping Yang,Rujin Zhou,Youhua Zhang,Shui Cao,Dan Zhang,Hongbing Ji,Linhai Duan,Xiuhong Meng 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.3

HP-Cu-BTCs (CTAB), HP-Cu-BTC(N,N), HP-Cu-BTC(SDBS) series with open metal coordination site Cu(I), cage window sites, tunable porosity, high specific surface area, cavity, etc., were synthesized using cationic surfactant (cetyltrimethylammonium bromide, neutral organic amine, and an anionic surfactant as templates, respectively, A variety of techniques were used to analyze the materials before and after CO2 cycle adsorption at 303K. A high BET specific surface area (1,194.06 m2/g) and total pore volume (0.63 cm3/g) were found in the synthesized HP-Cu-BTC(NN). The synthesized HP-Cu-BTC(N,N) not only has high CO2 adsorption capacity (7.4293 mmol/g) but also good selectivity (37.20) for adsorption separation of CO2/N2. Besides, FT-IR spectroscopy, CO2-TPD curves and adsorption kinetic curve demonstrated that the adsorption mechanism of synthesized HP-Cu-BTC(N,N) was mainly attributable to physisorption and it could be regenerated at relatively low temperature. The mesoporous structure not only improves the uptake capacity but also improves the diffusion and mass transfer of CO2. At the same time, the CO2-TPD showed that the HP-Cu-BTCs may have two major adsorption sites. One is to absorb CO2 molecules through van der Waals forces. The other is the electrostatic interaction of the open Cu sites with CO2. Therefore, the CO2/N2 adsorption selectivity of HP-Cu-BTC(N,N) is significantly higher than that of conventional Cu-BTC. After five consecutive adsorption/desorption cycles, the adsorbents retained an excellent adsorption property. Thus, it is a very good adsorbent for the CO2 capture.