��ࡱ�>�� kn����j��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� �R�Tjbjbj��>r�}�}r1)�������� � 11111����EEE8}<�lEj*V%;QQQ�� �})))))))$�,�b/8�)�1������)11QQX$*�����1Q1Q})��})��V�$�5&Q����@TFb�E�Z�% i):*0j*�%x�/ ��/5&5&|�/1�'����������)�)����j*�������������������������������������������������������������������������/���������� ' �: D�1� 2018t^_>e�����bhy��vGl;`h� �^�Sy��v T�yT��|�N1NO�Ruir(�Pg�e�[T�����S�^(uxvz�Q �e2ˆ}vv�h��g�IQ�c���g�^�S�[�nv�SO����Ǐ z:y*�xvzH�\:_3Enhancement of embedded interfaces in low-CO2 chemically activated cementitious materials using nanomaterials�� Oe4Hydrogen Spillover Effect by Au Nanoclusters on Nitrogen-Doped Carbon hg 3�5�_Am�c�gQ{zf��4l�Q���_�VH� ς6 ieQPg�e�v�NuRP[�����T�|�Q g�^Z�ƖSO�v6RY�_ y� y��vN� NO�Ruir(�Pg�e�[T�����S�^(uxvz �QN�vؚ��SU\�~>yO�~Nm�v3z�[�SU\�c�O�N�W,gir(��O�� �FO T�e_N&^eg�NN�|R�s�X� ��YW0W�v�xS ��Qo�Am1Y �4lSOal�gI{0;m'`�p/flQ���vN�]�~��^�l�^(u�N�s�O���W�v hQ�� Pg�e0�s6��k �;m'`�pu�N;N���N O�~Sf[�l�Tirt�l:N;N ��[�;m'`�p N�N�N f:yN�[�v RP[[{He�^ �sS�v�[RP[(�ϑ\�NN�[� e0R�nv�SO��Y�vހ(�-N �b:NTg�nv�SO�SN�~ހ�Q�N/T�RNgbL��vsQ.��V }0ُ�y�~�~ˆ}vv�1u���QT��Yibce���y�vyr'`:Nb�N�g�^�e�W�v�nv�SO����S:y*�ՋBR�c�O�N�e�v`�0,gy��v�b\wQ gpH�T�^�R���vg�IQ�OhRP[ޏ�c�N�~�~ˆ}vv� N �S_�nv�SO����T ��~�~ˆ}vv�1u���QT��Yibce���y �\��Y9hnc���QY�vpH�T�^g�IQ�O�S�v9e�S�[�Ǐ zۏL�:y*�0y��v�v_U\\%_e��s g�nv�SO����S:y*�ՋBR@bX[(W�v:w� � T�e �@bx�S�v���[�eߍ*��nv�SO����Ǐ z�vg�IQ�c��\:N�c:y�nv�SO�SN�~ހ�Q�N�v:g6Rxvz�c�O gHe�vq_�P�]wQ �v^ g�R�N�f�~ހ�Q�NǏ z-N�nv�SO�����vRP[:gt ��N ��cۏ�[�~ހ�Q�N:g6R�v�meQxvz0 ,gy��v�b(W@b�g�^�v YT�g�e�c��SO�|�[�~ހ�~�~ˆ}vv�;mSTyr_'`�~T���R0�c��(W;m�~ހ�Q�SMOh��ˆ}vv����R�S;mSh��T�[�nv�SO�_�s�X-N�vb�Pxvz�Q�[ NN�XYxvz�~qQ T_U\�vsQ�]\O � T�e)R(u YT�g�e�c��SO�|xvz�nv�SO��:R�o�VP[��[ N�v�~ހ�Q�[ir�R�Rf[L�:N �:N@b_�S�v�g�e�c��SO�|�c�O gHe'`����0 T��|�N�H�\:_ Ye�c 5u ݋�025-83587856 E-mail: chenxq@njtech.edu.cn y��v N� Enhancement of embedded interfaces in low-CO2 chemically activated cementitious materials using nanomaterials Research background Given that ordinary Portland cement (OPC) production accounts for 5  8% of anthropogenic CO2 emissions,1 there is a pressing need to develop and implement sustainable alternatives. Chemically activated materials in terms of either alkali-activated materials (AAMs) or CO2 activated materials (CAMs) are two of the most competitive alternatives. AAMs have been shown to emit less CO2 (~ 40 � 80%) compared with OPC.2-4 AAMs utilize aluminosilicate-rich precursor materials, including industrial by-products such as ground granulated blast-furnace slag, fly ash from coal-fired power plants and calcined clays (e.g., metakaolin), which form mechanically hard binders (gels) when activated by alkaline solutions (or solids, as is the case for 1-part mixes).4 Furthermore, given correct mix designs, AAMs have comparable mechanical performance and cost5 to OPC, and can be tuned to have superior properties via specific chemical compositions, such as high thermal performance6 and low permeability.7 Nevertheless, questions remain regarding the long-term durability of AAMs, with the underlying degradation mechanisms often founded at the atomic/nanoscale, such as carbonation-induced chemical reactions8,9 (from atmospheric and accelerated CO2 conditions) and sulfate attack of the binder gel.10 Progress is being made to elucidate the mechanisms responsible for chemical degradation of different types of AAMs, with the aim to pinpoint which mix designs are most resistant to different forms of degradation.9 Due to the high surface-to-volume ratio, nanomaterials may potentially improve the performance of cementitious materials by acting as extra nucleation sites for gel growth or providing a filler effect. Numerous studies have been conducted on adding nanoparticles to cementitious materials (albeit sometimes at extremely high concentrations (> 1% wt.) which may not be economically viable), revealing that the addition of nanoparticles can accelerate the reaction process,11,12 increase strength,13 and reduce porosity.11 However, there is limited literature available on the impact of nanoparticles on their ability to augment the chemical degradation mechanisms that plague cementitious materials, including AAMs. Preliminary research revealed that ZrO2 nanoparticles have stark impact on the drying-induced atomic structural changes that occurred when silicate-activated slag (a type of AAM) was exposed to low relative humidity environments (Figure 1). Given that the nanoparticles were seen to drastically alter the nanoscale behavior of the material during drying, density functional theory (DFT) calculations were used to uncover the mechanism by which the nanoparticle surfaces alter the evolution of the material during evaporation of the pore solution. Specifically, it was found that an �unconventional� silica-rich gel precipitated as drying progressed, which provided a reinforcing effect and minimized the development of nanoscopic strain. Hence, the zirconia surfaces were catalyzing additional gel growth during drying, where an increase in the ionic concentration of the pore solution led to the precipitation of a highly polymerized silica gel on the surface of the nanoparticles. Content of Research The proposed research in this project builds on these preliminary results that revealed the significant impact a small (< 1% wt.) amount of nanoparticles can have on the chemical mechanisms at play in a ubiquitous construction material. Specifically, this project will investigate the ability of nanoparticles to chemically enhance the bulk properties of AAM pastes and the interfacial properties located in the interfacial transition zone (ITZ) in AAM mortar and concrete. The ITZ in concrete (both traditional and sustainable options) is the weak link of the material, where typically there is a low density interface between the paste and inert sand and aggregate particles.5 Hence, any structural damage that occurs to concrete as a response to mechanical or chemical degradation tends to be concentrated at the ITZ, and therefore options to strengthen this region would enhance the durability of concrete. A range of readily available nanoparticles/nanomaterials will be investigated, specifically those that are known to be stable under high pH conditions (conditions prevalent in cementitious materials), including ZrO2, TiO2, graphene oxide, carbon nanotubes and nano-CSH (cement additive). One technique that is capable of investigating the chemical/physical interactions at (smooth) interfaces is reflectometry. By using either X-rays or neutrons, reflectivity analysis provides information on any embedded nanometer-sized layers that exist at an interface, such as any weak low density layers. Therefore, this technique will be used to uncover the extent of physisorption/chemisorption that is present in AAM systems, specifically by elucidating the interfacial properties existing between the bulk paste and atomically smooth quartz (SiO2) and calcite (CaCO3) surfaces. Samples will be synthesized via the spin-coating technique, and will be kept stored in a high relative humidity environment to avoid drying of the thin deposited layer. Additional interfacial measurements will be performed on hydrated alite, which is the main constituent in OPC-based systems. Once the surface interactions are elucidated for neat AAM (and OPC) systems, the impact of nanomaterials on the strength of physisorption/chemisorption at the nanoscale will be assessed. The nanoscale information determined using reflectometry will be complemented by micron scale data on the ITZ obtained using environmental scanning electron microscopy (SEM). Furthermore, focused ion beam (FIB) coupled with TEM analysis will be performed to assess the influence of nanomaterials on the local atomic structure of the paste in the vicinity of the interface. It has been recently shown that the presence of nanomaterials in cement paste can locally alter the atomic structure of the main binding phase, calcium-silicate-hydrate (C-S-H) gel,14 and therefore this project will elucidate the influence certain nanomaterials have on the strength of interactions in the vicinity of the embedded interfaces (quartz/calcite). Complementary DFT calculations will be performed to uncover the mechanisms by which these nanomaterials enhance the interfacial properties, which, as outlined earlier, was crucial for determining the effect nano-ZrO2 had on the drying behavior of silicate-activated slag (one type of AAM). Research Partner Requirements Strong background on chemistry and physics and experience of performing the fundamental researches on the chemically activated materials (AAMs or CAMs) coupled with expertise in utilizing modern techniques, e.g. neutrons, X-ray, TEM, to characterize the microstructure of cementitious materials at nano-scale. Capable of pursuing fundamental research on the AAMs or CAMs and publishing high impact papers with reputable international journals. Expect Research Outcomes/Results Outcomes of this fundamental research include : (1) understanding the intrinsic influence of foreign or in-situ formed nanomaterials on the reaction taking place in the chemically activated materials (AAMs and/or CAMs) as well as the corresponding effects on microstructure and mechanical performance at nano-scale. (2) determination of the ideal nanomaterial(s) in AAMs and/or CAMs to enhance the strength of physisorption/chemisorption at the ITZ, and mechanism(s) of interaction that lead to this increase in interfacial strength. Contact: Prof. Dr. Min Deng Associate Prof. Liwu Mo State Key Laboratory of Materials-oriented Chemical Engineering Materials Science and Engineering Nanjing Tech University Xin-Mo-Fan Road 5 Nanjing 210009, P.R. China Email: dengmin@njtech.edu.cn or andymoliwu@njtech.edu.cn y��v�V� Hydrogen Spillover Effect by Au Nanoclusters on Nitrogen-Doped Carbon With growing interest in alternative energy sources, the prospect of hydrogen s role as a fuel has become a major driving force for the optimization of storage methods. In heterogeneous catalysis, hydrogen spillover refers to the migration of hydrogen atoms from the metal catalyst onto the nonmetal support or adsorbate, which has emerged as a possible technique for achieving high-density hydrogen storage at near-ambient conditions in lightweight, solid-state materials as adsorbents. 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Current trends include the use of metal-organic frameworks (MOFs) and other porous nanocarbons materials with high surface area for such storage. Our group has focused on the photocatalytic water splitting by junction composites based on atomically precise noble metal nanoclusters, especially Au nanoclusters for the hydrogen production. Recently we have also developed several methods for synthesizing nitrogen-doped carbon with designable morphologies and defect states. Therefore, it is very attractive and practical to combine the Au nanoclusters with nitrogen-doped carbon to understand the possible hydrogen spillover effect therein. For the above research purpose, our group is inclined to cooperate with an international group which has plentiful experiences in the hydrogen spillover effect. Especially, in attempts to characterize the mechanism of hydrogen spillover in our precisely nanofabricated model system, research group that is skillful at radiation photoelectron spectroscopy to analyze the shift between different oxidation states of the support as well as single-particle spectromicroscopy is urgently expected. Contact Person: Prof. Yang Yang Office Tel�025-8317 2297 E-mail: HYPERLINK "mailto:yangy@njtech.edu.cn"yangy@njtech.edu.cn y��v�N� �_Am�c�gQ{zf��4l�Q���_�V 8h�X�~�g�v4l�Q���_�V/fN�yup;mY�S�v}�SO �vQ�Q8h��Y�c�O^��vzz��(u�NS��\RP[0'YRP[CN��~ހ ��XB\��Y gHe0W:NS��(W�Q8h�vbR�c�O�v�[3z�[�v�s�X �v^�c6RvQʑ>e �/fuir;So����W�vxvz�p�pKNN �wQ g^�l�v�^(uMRof0,gy��v�b�����_Am�chV�N �-d�^:g�h�/cs^�S�TY�R5u:Wňn ����R Tt�$c�Q�v4l��Q�v ��T4l�Q���-N���v � �(Wzzl�Y�v �-Nb_b4l�Q���_�V0 �bN g0N�[xvz�~���v�����~ۏL�T\O �)R(u�_Am�c�b/g �Ǒ(u�e�k�nBR�Tuir�v�[Pg�e �Nek�l6RY'Y\GWN�S�c�v4l�Q���_�V0�Ǐ(W Tt�qQ\Am�~�g�v�_Am�c��Gr N�e�R�S5u/c�Rňn�c6RY�vAm�HT�{��SS �\Y�vޏ�cؚ�S5u�n�N6RY'Y\GWN�v�S�c�m�n �)R(u�NT��S�^b_bwQ g4l�Q��Y�X�v�_�V �㉳Q O�~6RYǏ z-N�_�Vl��y�T�l�v�Sd��V���v�0����V��Y(u�NS��4l�n'`�T��n'`o�irRP[ ��cؚo�ir3z�['`�S��ˆ}v(�0DNAI{uir'YRP[ �(u�Nuir'YRP[�vR�g�hKm�S���~ހ �ۏL��~ހ�v N�~�W{Q0 T��|�N�RP[�~ň�[���[ H�ςYe�c 5u ݋�Zf]h]�]�]d^f^p^�^�^�_�a�a�afXfZf\f^f`fbf��������������������gd|p�dhgd�OZ ��dhWD�`��gd�OZ$a$gd]~l$a$gd]~ld,��7$8$H$XD2gd�@���d,��7$8$H$WD�XD2`��gd�@�p^�^�^�afXfZftfxfzf|f~f�f�f�f�f�g�gvizi�i�����ĺ����ucSuC4C4Ch�(#h�(#CJOJQJaJh�(#h�(#CJOJQJaJo(h�(#h�(#5�CJ OJQJaJ"h�(#h�(#5�CJ OJQJaJo(#h�(#B*CJKHOJPJQJphh�OZh�(#5�CJOJQJaJ h�(#5�CJ KHOJQJaJ o(#h�OZh�(#5�CJ KHOJQJaJ h�(#OJPJQJh|p�OJPJQJUh�OZh]~lCJOJQJaJh�OZh]~l5�CJOJQJaJh�OZh]~l5�CJ OJQJaJ�025-8317 2258 E-mail: chensu@njtech.edu.cn y��vmQ� ieQPg�e�v�NuRP[�����T�|�Q g�^Z�ƖSO�v6RY Z�(l�Wx�0Z�Y�|I{Pg�ewQ g��ؚ�vuir;m'` ��S(ueg!j�b�~ހY�W(� ��Sg�^(u�N�~�~�] z�ShV�[�O Y0uir�WPg�exvz�[�c�Q�W�N YBg�~�~�R��0zz���~�gI{�VRf[�W@xۏL�!j�bR�g�S�Nu6RYzf��Pg�e0vQMR�c/f�[uiruirؚRP[ۏL��Nu����v^�[vQZ�ƖSO�v g�^�|�Q�c6R0 �bN g0N�[uir;S(uPg�e_�S�~���vxvz�~0;Sb�T\O �_U\(u�NY�~ހqQ�W{Q�v/e�gPg�ex�S�SvQ�W{QSO�|�v�^�z �ۏL�K��N/e�guir�R���v����0�b/g�SSO�QY�����T�|�~ċ�N0͑�pۏL� ieQPg�e�[‰�Sh�b�/Lub��Rf['`(��:_�^09_'`!jϑ0R'` �0h�b�/Lub�5uw�05uMO�SR^0�bQb�g�W ��N�ST[���~�g�T[���s0T[��:\�^�SR^I{ ��vh��_�SvQ�[�~ހ���y0��[0�X�k0RS0�Q�N�SN�~�~�~T�vq_�T�SvQ�['`�SJS�[ϑsQ�|�/e�gPg�e�vؚuir;m'`�SvQ�Nu�v:g6R�SNPg�e�vSf[�~b0:\�^�T�~�g�vsQ�|0 T��|�N�uir�WPg�exvz�[ �_y�Ye�c 5u ݋� 025-58139433 E-mail: xuh@njtech.edu.cn     PAGE \* MERGEFORMAT3 bfdfffhfjflfnfpfrftf~f�f�f�f�gxizi�i�i�i�i�i�i���������������������� ��dhWD�`��gd�(# ��WD�`��gd�(#$a$gd�(# $��WD�`��a$gd�(#$a$gd�(#gd|p��i�i�i�i�i�i�ijjjj jjjjjjDjFjHjJjLjNjRjTj�������¾¾¾¾���������hVhb|Dhb|DmHnHsHuh[g�jh�UhdMojhdMoUh�OZh�(#OJPJQJh�(#OJPJQJh�(#h�(#CJOJQJaJo(h�(#h�(#CJOJQJaJ�ijjj j jjjjjLjNjPjRjTj��������������$a$gdnfgd|p�< 001�82P:p[g���. ��A!�"�#��$��%��S�� ���$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@��$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@��$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@��$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@��$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@��$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@��$$If�!vh5�15�5�#v1#v#v:V �l�� t��0��������6,�5��5�E5�dyt�@�j ��������666666666vvvvvvvvv666666>6666666666666666666666666666666666666�666666666666hH66666666666666666666666666666666666666666666666666666666666666666�62���� 0@P`p������2(�� 0@P`p������ 0@P`p������ 0@P`p������ 0@P`p������ 0@P`p������ 0@P`p��8X�V~ OJPJQJ_HmH nHsH tHJ`��J ��ck�e $1$a$ CJKH_HaJmH nHsH tHZ@"Z �{bh�� 2�d�d1$@&[$\$a$5CJ$KHOJQJ\aJ$tH $A`���$ ؞���k=�W[SOBi@���B 0nf�h� *B*ph�DD nf0u� w�9r G$P��a$CJaJ>��!> nf0u� w CharCJOJPJQJ^JaJ: @2: nf0u���9r G$a$CJaJ>��A> nf0u�� CharCJOJPJQJ^JaJ�eR� �'`0 HTML ���� @J �{bh�� 1$a$m$ @���CJ8KHOJPJQJaJ8tH J���J �{bh�� Char$@���CJ8KHOJPJQJ^JaJ8tH D�O�D �{bR�Q�k=�11$^��a$m$CJKHaJtH PK!����[Content_Types].xml���j�0E����ж�r�(��΢Iw},��-j��4 ��w�P�-t#bΙ{U�����T�U^h�d}㨫���)��*1P�'�� �^��W��0)��T�9<�l�#��$yi}��;�~@��(���H����u�* Dנz��/0�ǰ���� $�� X��3aZ����,�D0j~�3߶�b��~i>���3�\`�?�/�[���G��\�!�-�Rk.�s�Ի�..���a濭?��PK!�֧��6 _rels/.rels���j�0 ���}Q��%v/��C/�}�(h"���O� ������=������ ����C?�h�v=��Ʌ��%[xp��{۵_�Pѣ<�1�H�0���O�R�Bd���JE�4b$��q_����6L��R�7`�������0̞O��,�En7�Li�b��/�S���e��е������PK!ky���theme/theme/themeManager.xml �M � @�}�w��7c�(Eb�ˮ��C�AǠҟ����7��՛K Y,� �e�.���|,���H�,l����xɴ��I�sQ}#Ր���� ֵ+�!�,�^�$j=�GW���)�E�+& 8���PK!�lN���theme/theme/theme1.xml�YOoG�W�w�b'v�#;6i!ņ��x=�2���'����T�*�8�ꥇ�-H�T�eJE��W蛙��N�n�(j��g���߼Y��p+bh�Iy���g+"�χ4�޵~�̊����3��7!һ����� ID��*nz�R��‚�a˳ xjm)ʬuW��Lfd���ݮ�+5_��4cs��j��-V��?k3���rm}�����g��z���� ��g��s�嚋7���xw����sȈ��R� �W*)|��jȫK��Xͫ��� dX��IBF؇bn�h (� �*��'vɗ3KZ����jz'c*����_=}��<9����ݻw~���]�8��^~��_o�?����xY���ýg�~^�������G }J��0��E�m��h��=���Ԅ��� �Ξa�>s�$�-, �O�ɠ���=Hp� Ua/� �UO d*:�(�.�f�T�����U��/!�9$V[|h���rv����s��-i�U�t. �����6��ڪ�4C����ebs)����bMj�B�e��k�p��� u�m����,�f�d��$͑�{6GU���Vf�~�b��#�V���b�@�q�TTW��.�ޛd)��i�@��vdq�9Y���^��X�����7�{2�%�u��H�x��+a���f6]>�f#s�m�*���q�q��DH��ehK� ���)���@��?71����o�ggo��`:fղ�e������k�p£�2֌Nj��8��ǰ�D �CB�?8���1e��>�nE��eU}�H�]��dm1iQ6��褣�֧<��z[[v�|�0��p�sz�4��F؉�]�j�����Qv�1�1ߖ��⃛�� ��`̔4��S 3t��4��h��� ��PK! 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